api 653 pc question bank psj

8/17/2019 API 653 PC Question Bank PSJ

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INTRODUCTION

This material is to help prepare you for the API 653 Certification Examination.Your degree of proficiency in this material will be tested throughout the course.

The below listed references are indicated as the source of the answers next toeach question. To best prepare for the course and the examination, you shouldstrive to memorize these questions and answers.

REFERENCE INDEX

API 650 Welded Steel Tanks for Oil Storage

API 651 Cathodic Protection of Aboveground Petroleum StorageTanks

API 652 Lining of Aboveground Petroleum Storage Tank Bottoms

API 653 Tank Inspection, Repair, Alteration and Reconstruction

API 2015 Preparing Tank Bottoms for Hot Work

Section V ASME Boiler and Pressure Vessel Code

Nondestructive Examination

Section IX ASME Boiler and Pressure Vessel Code

Brazing and Welding Qualifications.






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1) __________ is a change from previous operating conditions involvingdifferent properties of the stored product such as specific gravity or

corrosivity and / or different service conditions of temperature and / orpressure"

(a) Re-rating; (b) Change in service;(c) Repair; (d) Reconstruction

REF : API-653, - 1.5.4

ANS : (b)

2) A __________ is a device used to determine the image quality of aradiograph.

(a) A step wedge comparison film; (b) A densitometer;(c) A penetramter (d) All of the above.

REF : Section V, T-233

ANS : (c)

3) A corroded roof plate is found to have an average thickness of 0.1"measured over an area of 100 sq. inches. This area shall be :-

(a) Repaired or replaced; (b) Found to be acceptable;(c) Repair is prohibited; (d) Replacement is mandated

REF : API-653, 2.2.1.2

ANS : (b)

4) A double-welded butt joint is defined as :-

(a) A joint between two members that intersect at an angle between0 degrees (a butt joint) and 90 degrees (a corner joint).

(b) A joint between two abutting parts lying in approximately the same

plane that is welded from both sides.(c) A joint whose size is equal to the thickness of the thinner jointedmember.(d) A joint between two overlapping members in which the overlappededge is welded.

REF : 650 3.1.1.1






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ANS : (b)

5) An external floating roof shall be provided with atleast one manhole havinga minimum inside diameter of __________ inches.

(a) 18; (b) 15; (c) 24; (d) 30.

REF : 650 APP. C. 3.11

ANS : (c)

6) A formal Visual External inspection by a qualified inspector shall be doneatleast :-

(a) Every 5 years of ¼ CR life whichever is less(b) Every 5 years of ½ CR life whichever is less(c) Every 2 years(d) Every 1- years or ¼ CR life whichever is greater

REF : 653 4.3.2.1

ANS : (a)

7) A full hydrostatic test (when required) shall be held for __________ hours:-

(a) 24; (b) 8; (c) 18; (d) 12

REF : 653 10.3.1.1

ANS : (a)

8) A full-fillet weld is a weld that :-

(a) not less than 1/3 the thinner plate;(b) the legs equal the thickness of the thinner plate;(c) the largest isosceles triangle that can be inscribed within the crosssection of the weld(d) is atleast the thickness of the thicker plate

REF : API 650 3.1.1.7

ANS : (b)

9) A hot tap in a 1.25" thick tank with a minimum metal temperature of 65oFat time of hot tap, without having material toughness data is :-






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(a) not permitted; (b) permitted;

(c) not enough information; (d) not addressed by the codeREF : API 653 – 7.13.4 & Fig. 7-5

ANS : (a)

10) A hydrostatic test for a relocated tank :-

(a) may be waived by the Owner / Operator; (b) is required;(c) may be waived by the Inspector; (d) is not necessary

REF : 653 10.3.1.1 (a)

ANS : (b)

11) A liquid penetrant examiner must have vision to enable him to read JaggerType 2 standard chart at a distance of not less than 12 inches and iscapable of distinguishing and differentiating contrast between coloursused. Examiners shall be checked __________ to ensure that they meetthese requirements :-

(a) Quarterly; (b) Semi-Annually;(c) Annually; (d) Bi-Annually.

REF : 650 6.4.3 (a)

ANS : (c)

12) A procedure qualification record (PQR) shall address :-

(a) non-essential variables;(b) (b) essential variables;(c) supplemental essential variables (when required);(d) (d) both (b) and (c)

REF : IX QW-200.2

ANS : (d)

13) A radiograph is made using an X-ray source and two films in each filmholder. For composite viewing, each film of the composite shall have aminimum density of :-

(a) 4.0; (b) 1.8; (c) 2.0; (d) 1.3






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REF : Section V, T-282.1

ANS : (b)14) A reconstructed tank with a total height of 25' has been determined tohave an out-of-plumbness of 2-3/4". This is :-

(a) acceptable; (b) unacceptable;(c) not covered by the code (d) corrected by eternalstrengthening

REF : API-653, 8.5.2.1

ANS : (a)

15) A riveted tank shell with a butt joint has 3 rows. What is the jointefficiency ?

(a) 0.75"; (b) 0.85"; (c) 0.90; (d) 0.91.

REF : API-653, Table 2-1

ANS : (b)

16) A SAW welding operator is attempting to quality by radiography on a 6inch thick test coupon. Elongated slag inclusions are measured to be 0.2inch long.

(a) Must weld 2 additional coupons; (b) meets the requirements(passes)(c) slag must not exceed 0.5" (d) slag is not acceptable.

REF : Section IX, QW-191.2.2

ANS : (b)

17) A self-supporting cone roof :-

(a) is formed approximately to the surface of a right cone;(b) both a and d(c) has columns and / or rafters on trusses(d) is supported at the periphery.

REF : API 650 3.10.1 (a)

ANS : (b)






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18) A shell to bottom fillet weld for a Grade IV material shall be

(a) made with atleast 2 passed; (b) may be made with 1 pass(c) shall be atleast 3 / 16" (d) both (a) and (c) aboveREF : API 650 3.1.5.7 c

ANS : (a)

19) A single film technique was used to make a radiograph using a Cobalt-60source. The minimum permitted density in the area of interest is :

(a) 4.0; (b) 1.8; (c) 2.0; (d) 1.3.


ANS : (c)

20) A supported cone roof :-

(a) is formed approximately to the surface of a right cone;(b) both (a) and (c);(c) has columns and / or rafters on trusses;(d) is supported at the periphery

REF : API 650 3.10.1 (a)

ANS : (b)

21) A tank bottom depression is 9.125" deep, radius of depression is 22.5 feet.What is the maximum depth of depression ?

(a) 7.825"; (b) 8.062"; (c) 8.125"; (d) 8.325"

REF : 653 APP. “B” B-6

ANS : (d)

22) A tank bottom lining with a measured thickness of 15 mils should be testedwith :-

(a) A high voltage detector in accordance with NACE RP0188;(b) A low voltage (67.5 volts) wet sponge detector;(c) A calibrated Ultrasonic tester;(d) An Eddy Current lift-off detector;






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REF : API-652, 7.3.2

ANS : (b)

23) A weld shall be unacceptable by Visal Inspection if the inspection showswhich of the following ?

(a) The weld has no crater cracks or other surface cracks.(b) Undercutting exceeds the limits given in 5.2.1.4 for vertical orhorizontal butt joints.(c) The frequency of surface porosity in the weld does not exceed onecluster (one or more pores) in any four inches of length, and the diameterof each cluster does not exceed 3/32 inch.(d) All of the above;

REF : 650 6.5.1

ANS : (b)

24) A weld with a nominal thickness of 1.5 inch is to be radiographed using afilm side penetrameter, hole type. The penetrameter designation should be:-

(a) 25; (b) 30; (c) 35; (d) Both (a) and (b) areresponsible;


ANS : (a)

25) A welder may deviate from the parameters specified in WPS if they arenonessential variables :-

(a) Provided authorisation from inspection is documented;(b) Provided the welding supervisor approves;(c) No;(d) Nonessential variables only apply to PQRs

REF : Section IX, QW-200.1

ANS : (c)

26) A welder qualifies in the 3G position on a plate coupon, he is then qualifiedto weld in the position(s) on NPS 6 pipe :-

(a) F, V; (b) F only; (c) F, V, O; (d) ALL






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REF : IX QW-461.9

ANS : (b)

27) A welder who is qualified using a double-groove weld :-

(a) is also qualified to make a single V-groove weld without backing;(b) is also qualified to make a single V-groove weld with backing;(c) may weld in the 6G position;(d) must requalify every 2 months


ANS : (b)

28) A welder's ID must be placed at intervals not exceeding along completedwelds :-

(a) One foot; (b) One and a half feet; (c) Two feet; (d) Threefeet.

REF : API-653, 9.2.2

ANS : (d)

29) A welding procedure qualified on ¼ inch thick plate can be used to weldgroove welds in materials from to :-

(a) 3/16 to 3/4; (b) 1/16 to 3/4;(c) 3/8 to 3/4; (d) 1/16 to 1/2.

REF : QW-451.1

ANS : (d)

30) A welding procedure qualified on 3/8" thick plate can be used to weldgroove welds in materials :-

(a) 3/16 to 3/4; (b) 1/16 to 3/4;(c) 3/8 to 3/4; (d) 1/16 to 3/8.

REF : IX QW-451.1

ANS : (b)






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31) A welding procedure qualified under the 1965 ASME Code Section IX :

(a) Is obsolete;(b) Is still applicable;(c) Must be re-qualified every 3 years when code is re-issued;(d) is not addressed by the code

REF : Section IX Forward

ANS : (b)

32) Above-ground storage tank is defined as a stationary container with abarrel capacity greater than :-

(a) 2000 barrels; (b) 300 barrels;

(c) 500 barrels; (d) 750 barrels.

REF : API 651-1.2.1

ANS : (c)

33) Acceptance standards for MT examination shall be per :-

(a) AWS D-1.1;(b) SNT-TC-1A;(c) Appendix 6 of ASME Sect VII, div. 1(d) Article 7 of ASME Sect V

REF :650 6.2.4

ANS : (c)

34) All tanks shall be given a formal visual external inspection by an inspectorat least :-

(a) every 3 years or at quarter corrosion rate;(b) every 5 years or at quarter corrosion rate;(c) every 3 years or at half corrosion rate;(d) every 5 years or at half corrosion rate.

REF : API-653-4.3.2.1

ANS : (b)

35) An external inspection may be used as an alternative to the internalinspection only when :-

SEC VIII






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(a) operations dictate;(b) construction allows external access to the tank bottom to determine

thickness;(c) all insulation is removed from the tank;(d) no alternate is allowed.

REF : 653 4.5

ANS : (b)

36) Anticipated minimum thickness of tank bottom where bottom / foundationdesign provides for leak detection and containment is :-

(a) 0.10"; (b) 0.05"; (c) 0.09";(d) same as without leak detection and containment.

REF : API 653 Table 4-1

ANS : (b)

37) Radiographic location markers are to be placed

(a) on the exposure holder / cassette; (b) on the part;(c) between the part and the film; (d) either (b) or (c) above

REF :ASME Section V-T375

ANS : (d)

38) At what design metal temperature must impact tests be made for all weldmetal and procedures to be used ?

(a) Below 32oF; (b) Below 20oF; (c) Below 15oF; (d) Below10oF.

REF : API 650-7.2.2.4

ANS : (b)39) At what level is the atmosphere considered oxygen-deficient ?

(a) less than 19.5 %; (b) less than 21.9 %;(c) less than 24.9 %; (d) less than 16.0 %

REF : API 2015 – 3.3






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ANS : (a)

40) Base metals are grouped into groupings according to their weldingcharacteristics :-

(a) F-number; (b) AWS;(c) A-number; (d) P-number.

REF : IX QW-421

ANS : (d)

41) Based on a measured corrosion of 0.006" annually and using a corrosion

allowance of 0.120", how long before the next UT thicknessmeasurements are required ?

(a) 10 years; (b) 36.5 years;(c) 20 years; (d) 15 years.

REF : API-653 4.3.3.2

ANS : (d)

42) Based on variable-design point method, calculate the first coursethickness, exclusive of CA, for a 200 foot diameter tank, purchaser

specified specific gravity of 1, 56 feet in height, using 96 inch courses withmaterial stress of 23,000 psi. Design is based on test conditions :-

(a) 0.853; (b) 0.934; (c) 1.239; (d) 1.220

REF : API 650-3.6.4

ANS : (c)

43) Before elevating the operating temperature of a shell tank to a temperaturabove 200 degrees F, what document must be considered ?

(a) API RP 650, Welded Steel Tanks for Oil Storage;(b) API 650, Appendix M;(c) API RO 650, Lining of Aboveground Petroleum Tanks;(d) Publication 2207, Preparing Tank Bottoms for Work.

REF : API-653, 2.2.4.4

ANS : (b)






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44) Bimetallic corrosion can occur when :-

(a) A bronze check valve is joined to steel piping;(b) Either stainless steel or copper is connected to a steel tank;(c) Neither (a) or (b);(d) Both (a) and (b).

REF : API 651 2.2.2

ANS : (d)

45) Bottom leak detection :-

(a) can be detected by installation of cathodic protection;(b) can be detected by observation at a tell-tale hole;(c) is a hazard that can not be detected;(d) never happens when lining are properly installed.

REF : API 651 2.2.2

ANS : (b)

46) Bottoms exceeding 100' diameter in tanks operating above 200oF shallhave :-

(a) butt-welded annular bottom plates;(b) be made of a Group IV, V or VI material;(c) have a modulus of elasticity of 30,000,000;(d) all of the above.

REF : API 650< M.4.1

ANS : (a)

47) Hot water is defined as :-

(a) Work than can lead to fever;(b) an operation that can produce a spark or flake hot enough to igniteflammable vapours;(c) an atmosphere between the LEL and UEL;(d) both (a) and (c) above.

REF : API 2207, 1.1

Hot work






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ANS : (b)

48) Cathodic protection is achieved by directing the flow of current from :-

(a) A cathode to an anode; (b) An anode to a cathode;(c) Both installations are unacceptable; (d) Neither (a) or (b).

REF : 651 5.2.1

ANS : (b)49) Concrete rings shall be inspected for :-

(a) broken concrete, spalling, cracks; (b) vegetation against tank;(c) holidays in paint; (d) only (a) and (b).

REF : API 653 Appendix C, C.1.1.1

ANS : (d).

50) Construction, inspection and repair records shall be maintained by the :-

(a) Manufacturer; (b) Inspector;(c) Owner / Operator; (d) Jurisdiction.

REF : 653 11.2.1

ANS : (c)

51) Describe how a liquid penetrant examination should be performed in orderto detect discontinuities, which are open to the surface :-

(a) clean the part, apply the developer, apply the penetrant, removeexcess penetrant, inspect the part, clean the part;(b) clean the part, apply the penetrant, remove excess penetrant, apply thedeveloper, inspect the part, clean the part;(c) clean the part, apply the developer, apply the penetrant, inspect thepart, remove excess penetrant, clean the part;(d) clean the part, apply the developer, apply the penetrant, inspect thepart, clean the part.

REF : Section V-T620

ANS : (b)






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52) Determine the exact interval for ultrasonic thickness measurements for atank with 17 mils of the original 25 mils corrosion allowance still remaining

after 15 years ?

(a) 5 years; (b) 15 years; (c) 23.875 years; (d) 31.875 years.

REF : 653 4.3.3.2 (c)

ANS : (b)

53) Determine the maximum allowable height for a 90 foot diameter tank

based on a maximum shell plate thickness of 0.5 inch and maximumallowable stress of 21,000 psi, with a joint efficiency of 0.85, and nocorrosion allowance :-

(a) 29.6; (b) 35.3; (c) 39.1; (d) 43.9

REF : API 650-Table A-4

ANS : (c)

54) Differential settlement leads to :-

(a) potential floating roof hang up; (b) lack of circularity at the top;(c) oval shape at the top; (d) all of the above.

REF : API 653 Appendix B.2.2.3

ANS : (d)

55) Distorted anchor bolts may indicate :-

(a) overpressure uplift condition; (b) foundation settlement;(c) both (a) and (b) above; (d) anchor bolts do not distort.

REF : API 653, 2.5.3

ANS : (c)

56) During an inspection, you are required to calculate the retirementthickness for the bottom course of a tank. The information available is asfollows :-






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Diameter = 150 feetHeight = 40 feet

Specific gravity of contents = 0.77Joint efficiency = 0.7Material tensile strength is unknownMaterial tensile strength is unknown;Material maximum allowable stress is unknown.

(a) 0.050; (b) 0.7141; (c) 0.500; (d) 0.5625

REF : API 653 2.3.3.1

ANS : (c)

57) During hydrostatic test, no less than ______ settlementmeasurement points shall be surveyed :-

(a) 8; (b) 10; (c) 15; (d) 5.

REF : 653 10.5.1.2

ANS : (a)

58) E7018 electrodes are classified as F number :-

(a) 1; (b) 2; (c) 4; (d) 5.

REF : IX QW-432

ANS : (c)

59) Essential variable on a welding procedure specification :-

(a) those in which a change, as described in the specific variables, isconsidered to affect the mechanical properties of the weldment;

(b) variable are listed in section IX of the ASME CODE;

(c) both (a) and (b) above.






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(d) are the same for all procedures.

REF : Section IX, QW 251.2

ANS : (c)

60) Examiners who perform ultrasonic examinations under API-650 shall bequalified and certified by the manufacturers as meeting the requirements ofcertification as outlined in ?

(a) ASME; (b) ASNT-TC-1A; (c) API-650; (d) API-653.

REF : 650 6.3.3

ANS : (b)

61) Except as modifed in Section 6 of API-650, the radiographic methodemployed shall be in accordance with which Section and article of the ASMEcode ?

(a) Section II, Article 2; (b) Section III, Article 1;(c) Section V, Article 2; (d) Section IX, Article 1.

REF : 650 6.1.3.1

ANS : (c)

62) Exclusive of corrosion allowance, what is the minimum nominal thicknessfor all new construction bottom plates ?

(a) 1/2 inch; (b) 1/4 inch; (c) 3/16 inch; (d) 5/8 inch.

REF : API 650-3.4.1

ANS : (b)






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63) Existing shells shall be analysed by experienced personnel for :-

(a) fluid static head, internal and external pressure, wind loads,settlement and business needs;

(b) wind loads, settlement, fluid static head, internal and external pressureand nozzle loads;

(c) internal and external pressure, wind loads, fluid static head, settlementand if it convenient.

(d) only (a) and (b) above.

REF : API 653, 2.3.1.2

ANS : (b)

64) External tank bottom inspection is permitted :-

(a) when required by the inspector;

(b) only when reassembly is being done.

(c) where construction, size or other aspects allow;

(d) is not permitted.

REF : API-653, Table 4-1; 4.5

ANS : (c)

65) Find the capacity of a small tank, with a joint efficiency of 0.85, specificgravity = 1.0, no corrosion allowance, diameter is 40 feet, height is 30 feetwith 5 completed 72" courses.

(a) 5,370; (b) 5,140; (c) 6,710; (d) 7,350.

REF : API 650 – Appendix A.2.2 Table A-1

ANS : (c)

66) Flaws such as cracks in the weld in shell-to-bottom of a tank are :-

(a) not critical;

(b) acceptable if length is less than twice the width;






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23,430

(49)(150)2.6

(c) to be removed and repaired;

(d) welded over without needing to be removed.

REF : API-653, 2.3.6

ANS : (c)

67) Floating root anti-rotation devices shall be evaluated for :-

(a) needed repairs; (b) replacement;

(c) ultrasonically for flaws; (d) only (a) and (b) above.

REF : API 653, 2.2.3.3

ANS : (d)

68) For a 30 inch shell manhole, 0.5 inches thick shell and reinforcing plate,what minimum neck thickness is required ?

(a) 3/16; (b) 3/8; (c) 1/2; (d) 5/16.

REF : API 650 – 3.7.5.1 (Table 3-5)

ANS : (d)

69) For an existing 150 foot diameter storage tank, which has been in servicefor 28 years, known joint efficiency is 1.0, contents have been the same,with a specific gravity of 1.0, material yield of plate is 30,000 and tensilestrength is 55,000, liquid fill level is 50 feet, calculate the minimumallowable thickness for the second course :-

(a) 0.6789; (b) 0.7962; (c) 0.8056; (d) 0.8156.

REF : API 653 2.3.3.1

ANS : (d)

70) For butt-welded joints in which the thinner shell plate is 3/8 inch or less,how many spot radiographs shall be taken in the first 10 feet of completed






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vertical joint of each type and thickness welded by each welder orwelding operator ?

(a) One; (b) Two; (c) Three; (d) Four.

REF : API 650 – 6.1.2.2

ANS : (a)

71) For dome roofs that are flanged, the radius of curvature is limited by thedepth of the roof, including the crown and knuckle depth. What is t hemaximum roof depth for a shop assembled cone roof 10 feet in diameter?

(a) 2.0"; (b) 3.5"; (c) 5.5"; (d) 8.0

REF : API 650 – J.3.5.3 (Table J-1)

ANS : (c)

72) For impact testing materials, what is the minimum transverse value ofGroup IV materials, 1.5" thick ?

(a) 13 foot – pounds; (b) 15 foot – ponds;

(c) 20 foot – pounds; (d) 25 foot – pounds;

REF : API-650 Table 2-4

ANS : (c)

73) For impact testing materials, what is the minimum longitudinal value for a1.8" thick A-516-70 as rolled material for a WPS ?

(a) 50 foot – pounds; (b) 15 foot – pounds;

(c) 42 foot – pounds; (d) 40 foot – pounds.

REF : 650 7.2.2.5 or Table 2-3






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ANS : (c)

74) For new or repaired shell horizontal joints, how many radiographs shall betaken for each 50 feet of horizontal joint, not including those required atintersections of vertical and horizontal joints ?

(a) 1; (b) 2; (c) 3; (d) 5.

REF : API 653 – 10.2.1.2

ANS : (a)

75) For welds that attach nozzles, manholes, cleanout openings andpermanent attachments, undercut shall not exceed ______ inch.

(a) 3/32; (b) 1/8; (c) 3/16; (d) 1/64.

REF : 650 6.5.1

ANS : (d)

76) Foundations of relocated tanks specified as true to horizontal planewithout ringwalls shall be true :-

(a) ± 1/8" in any 30' and ± 1/4" in the total circumference;

(b) ± 1/8" in any 30' and ± 1/2" in the total circumference;

(c) ± 1/8" in any 10' and ± 1/2" in the total circumference;

(d) ± 1.4" in any 30' and ± 1/2" in the total circumference.

REF : API 653 8.5.6.2 b

ANS : (c)

0.4mm






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77) From what type of material should shims be fabricated when they are tobe used to radiograph welds ?

(a) Malleable materials capable of being drilled;

(b) From the same heat number as the material being inspected;

(c) Fabricated of radiographically similar material to the object to beinspected;

(d) All of the above.

REF : Section V, T277.3

ANS : (c)

78) Generally, tank bottom linings cover the entire tank bottom and extend ____ inches up the shell of the tank :-

(a) 10 – 15 inches; (b) 12 - 18 inches; (c) 18 – 24 inches; (d) 24 – 30inches.

REF : API 652 4.4

ANS : (c)

79) Hot taps are not permitted :-

(a) on the roof of a tank or within the gas / vapour space of a tank;

(b) where heat of welding may cause environmental cracking;

(c) hot (a) and (b);

(d) (a) only.

REF : API 653 – 7.13

ANS : (c)

80) Safe entry administrative controls include :-






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(a) an emergency plan; (b) atmospheric testing;

(c) ventilation procedures; (d) all of the above.

REF : API 2015, 2.1

ANS : (d)

81) How does the calculation of minimum thickness for a riveted tank shelldiffer from that of a welded tank shell :-

(a) The formula for the calculation of minimum thickness of a riveted tankshell is the same as for a welded tank shell except that the maximumallowable stress (S) is 21,000 lbs / sq. inch and the efficiency equals 1 forthe shell plate 6 inches away from rivets;

(b) The formula for the calculation of minimum thickness of a riveted tankshell is exactly the same for a welded tank;

(c) The formula for the calculation of minimum thickness of a riveted tankshell is the same as for a welded tank shell except the minimum allowablestress (S) is 21,000 lbs /s q. inch and the efficiency equals 0.85 for theshell plate 6 inches away from the rivets.

(d) API does not set minimum thickness.

REF : API-653, 2.3.4.1

ANS : (a)

82) How many equally spaced measurement are required for the thicknessaveraging technique ?

(a) 2; (b) 5; (c) 4; (d) 3.

REF : API 653, 2.3.2.1

ANS : (b)

83) How many impact specimens must be broken for an average value for P1,Group 1, 2, 3 material ?






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(a) 2; (b) 3; (c) 4; (d) 6.

REF : API-650, 2.2.8.3

ANS : (b)

84) How many inches must project beyond the outside edge of the weldattaching t he bottom sketch plate to the shell plate ?

(a) atleast 1/2 inch; (b) atleast 2 inches;

(c) atleast 9/16 inch; (d) atleast 1.0 inch

REF : API 650 – 3.4.2

ANS : (d)

85) How many settlement measurement points are required for a tank thatmeasures 200 ft. in diameter ?

(a) 30; (b) 8; (c) 21; (d) 10.

REF : 653 APP. “B” B-2

ANS : (c)

86) How many specimens and impact tests must be performed from a singletest coupon or test location ?

(a) 1; (b) 2; (c) 3; (d) 4.

REF : API 650 2.2.8.3

ANS : (c)






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87) How many specimens must be broken for an average value for P1, Group

1, 2, 3 material ?

(a) 2; (b) 3; (c) 4; (d) 6.

REF : 650 2.2.8.3

ANS : (b)

88) Hydrochloric acid may be formed by :-

(a) Sodium and potassium; (b) Magnesium and calcium chlorides;

(c) Calcium chlorides and sodium; (d) Potassium and Magnesium.

REF : API Chapter II, 202.022

ANS : (b)

89) Hydrostatic tests shall be held for ____ hours :-

(a) 2; (b) 8; (c) 24; (d) 72.

REF : API 653 10.3.1.1

ANS : (c)

90) If penetrameters are not placed adjacent to the welds, what rules apply ?

(a) The penetrameter should be placed on the source side of the materialbeing radiographed.

(b) The penetrameter may be placed on the film side of the material beingradiographed.

(c) Lead letter "F" atleast as high as the identification number is placedadjacent to the film side penetrameter;







25

REF : Section V, T277

ANS : (d)

91) In a radiographic film of a weld, how is film sensitivity or quality measurd ?

(a) by use of a penetrameter; (b) by film density;

(c) comparing to known defects; (d) all of the above.

REF : Section V, T282, T283

ANS : (a)

92) In a riveted tank shell, a butt joint has 3 rows. What is the joint efficiency ?

(a) 0.75; (b) 0.85; (c) 0.90; (d) 0.91.

REF : 653 Table 2-1

ANS : (b)

93) In accordance with Section V, intensifying screens :-

(a) Can always be used;

(b) Can be used unless restricted by the referencing Code;

(c) Can never be used;

(d) Can be used only with Type 1 film.

REF : Section V T-232

ANS : (b)

94) In general, if shell thickness does not exceed ____ inch, it does notrequire further assessment for brittle fracture :-

(a) 0.25; (b) 0.75; (c) 1.00; (d) 0.50






26

REF : 653 Notes for FIG. 3-1

ANS : (d)

95) In tank floors, the maximum depth of bulge or edge settlement isdependent upon :-

(a) Floor thickness; (b) The radius of an inscribed circle in the area;

(c) tank diameter; (d) Tank height.

REF : 653 APP. “B” ANS : (b)

96) Information needed when determining the rate of corrosion :-

(a) Original thickness or last inspection thickness;

(b) Current thickness;

(c) Length of time in service;


REF : AI 653,

ANS : (d)

97) Inspection history as required in the tank records is :-

(a) all measurements taken, condition of all parts inspected and a recordof all tests and examinations;

(b) personnel certification;

(c) training records;

(d) the as built record from the erector.

REF : API 653, 4.8.3

ANS : (a)

98) ______ inspection may be substituted for a program of external URthickness measurements :-

(a) Hydrostatic; (b) External; (c) Acoustic; (d) Internal.






27

REF : 653 4.3.3.3

ANS : (d)

99) Inspection of emergency P/V hatches includes :-

(a) Servicing; (b) Removing oil from seals;

(c) Action to prevent chattering; (d) Only (a) and (c) above.

REF : API 653, appendix C.2.7.4

ANS : (d)

100) Inspection of insulation :-

(a) is not required;

(b) is done in routine in-service inspections;

(c) requires material traceability records;

(d) only (b) and (c) above.

REF : API 653, 4.3.1.3

ANS : (b)

101) Insulated tanks shall have their insulation removed :-

(a) completely prior to inspection;

(b) yearly;

(c) from welded joints only;

(d) to extent necessary to determine the external condition.

REF : 653 4.3.2.2

ANS : (d)






28

102) Interference current problems in cathodic protection are can beapproached by :-

(a) drainage of collected current to sacrificial anodes;

(b) design to mimnimise exposure;

(c) provide metallic return of collected current to a foreign structured;

(d) all of the above.

REF : API 651 8.4.1

ANS : (d)

103) Internal inspection intervals are determined by corrosion rates. Normally,the corrosion rates govern :-

(a) roof; (b) upper shell; (c) bottom; (d) lower shell.

REF : API 653 4.4.2.1

ANS : (c)

104) Internal inspection intervals normally :-

(a) are controlled by bottom corrosion rates;

(b) shall not exceed 20 years;

(c) owner / user is free to set any convenient material;

(d) both (a) and (b) above.

REF : API 653 4.4.2.1

ANS : (d)






29

105) Internal inspection is primarily to :-

(a) all of the below;

(b) Ensure that the bottom is not corroded and leaking;

(c) Gather data for assessment;

(d) Identify and evaluate bottom settlement.

REF : API – 653, 4.4.1

ANS : (a)

106) Intervals between internal inspections shall be determined by thecorrosion rate. Normally, bottom corrosion rates control the inspectioninterval. However, in no case shall the interval inspection interval exceed ____ years :-

(a) 10; (b) 15; (c) 20; (d) 25.

REF : API 653 – 4.4.2.1

ANS : (c)

107) Letters and numerals on nameplates shall not be less than inch high.

(a) 5/32; (b) 5/16; (c) 3/16; (d) 1/8.

REF : 650 8.1.1

ANS : (a)

108) Liquid penetrant examiners shall be qualified in accordance with ____ :-

4mm






30

(a) ASME Section VIII, div. 1 Appendix 8.

(b) API 650;

(c) ASNT proc. SNT-TC-1A

(d) ASME SECTION V, Art 6.

REF : 650 6.4.3

ANS : (b)

109) Magnetic particle examination shall be performed in accordance with awritten procedure that is in compliance with the requirements of :-

(a) ASME Section V, Art. 7; (b) ASME Sectin IX, Art. 2;(c) SNT-TC-1A; (d) Appendix C, API 653.

REF : 650 6.2.1

ANS : (a)

110) Measurement of film thickness of tank bottom linings are taken :-

(a) only when the film has completely dried;

(b) both before and after the film has dried;

(c) in accordance with ASNT;

(d) only if there is reason to believe it is thin.

REF : API-652, 7.3.2.2

ANS : (b).

111) Minimum spacing between toes of welds for a radius (R) on a penetration

and other welds of 1.25" plate must be :-

(a) 6"; (b) 7.5"; (c) 3"; (d) 1.25"

REF : API 653 Figure 7-1

ANS : (b)






31

112) Minimum thickness calculation for shells of tanks 200 ft. or less in diameter

shall be done using ____ :-

(a) the variable design point method fo API 650;

(b) ASME section VII, div. 1;

(c) the formula given in API 653;

(d) either (a) or (c) may be used.

REF : 653 2.3.3.2

ANS : (d)

113) Acceptance criteria for NDT of reconstructed tanks are to be inaccordance with :-

(a) ASME Section VIII; (b) ASME Section V;

(c) API 653; (d) API 650.

REF : API 650 6.1.5, 6.2.4, 6.3.4

ANS : (d)

114) Of the following welding processes, which one is not permitted for weldingon above ground storage tanks :-

(a) SMAW; (b) GMAW; (c) OFW; (d) SAW.

REF : 650 5.2.1.1

ANS : (c)

115) On plates more than 3/16 inch thick, the fillet weld thickness shall not beless than 1/3 the thickness of the thinner plat at the joint and shall beatleast :-







32

REF : API 650 – 3.1.3.3

ANS : (c)

116) On the drawing that the manufacturer shall furnish the purchase, youwould expect to see which of the following information :-

(a) The required shell thickness for both the design condition (includingcorrosino allowance) and the hydrostatic test condition;

(b) The nominal thickness used;

(c) The material specification and allowable stresses;

(d) All the above.

REF : 650 3.6.1.8

ANS : (d)

117) Opening in tank shells larger than required to accommodate a _____ inchstandard-weight coupling shall be reinforced :-

(a) 1.0 inch; (b) 1.5 inch; (c) 2.0 inch; (d) 2.5 inch.

REF : API 650 – 3.7.2.1

ANS : (c)

118) Pan-type, pontoon-type and double-deck-type are examples of :-

(a) internal roofs; (b) external roofs;(c) both internal and external roofs; (d) roofs on tanks < 200' in dia.

REF : API 650 appendixes C & H

ANS : (c)






33

119) Per API 650, calculation of shell thickness by the 1-foot method cannot beused for tanks :-

(a) under 200 ft. in diameter; (b) over 200 ft. in diameter;

(c) under 150 ft. in diameter. (d) of any size.

REF : 650 3.6.3.1

ANS : (b)

120) Pinhole leaks or porosity in tank bottom joints may be repaired by :-

(a) grinding and out area; (b) penning over affected area;

(c) applying additional weld bead over area; (d) mechanical caulking.

REF : API 650 – 5.4.2

ANS : (c)

121) Piping connections such as nozzles shall be inspected for :-

(a) structural adequacy; (b) thickness of component;

(c) reinforcement; (d) all of the above.

REF : API 653, 2.3.9

ANS : (d)

122) Plate material thicker than ____ inches shall be normalised or quench

tempered, killed, made to fine grain practice and impact tested :-

(a) 2.00; (b) 1.75; (c) 1.50; (d) 1.00

REF : 650 2.2.1.4






34

ANS : (c)

123) Plates found to be thinner than those in the course above it are :-

(a) not allowed;

(b) permitted;

(c) permitted provided they were so designed;

(d) need to be calculated for suitability for service.

REF : API 650, 3.6.1.5

ANS : (a)

124) Procedure qualification for welding on a tank of unknown or obsoletematerial shall be done using test coupons of :-

(a) any P-1 material;

(b) any similar type material;

(c) material from the same P number grouping;

(d) actual material from the tank.

REF : 653 9.1.2

ANS : (d)

125) Procedure requirements for ultrasonic examination of welds :-

(a) shall be performed to a written procedure; (b) approved by ASNT;

(c) proven to the satisfaction of the inspector; (d) both (a) and (c) above.

REF : Section V, T150 c

ANS : (d)

126) Pure hydrocarbon fluids :-






35

(a) usually cause corrosion;

(b) require special corrosion control;

(b) both (a) and (b);

(c) (d) are usually not corrosive.

REF : API-651, 1.1.3

ANS : (d)

127) Radiographic acceptance standards are found in :-

(a) ASME Section VIII, div. 1, para UW-51;

(b) ASME Section V, Article 2;

(c) API 650, Section 3;

(d) API 653, Appendix D.

REF : 650 6.1.5

ANS : (a)

128) Reinforcement pads shall be tested by applying pressure between thetank shell and reinforcement plate using the telltale hole. How muchpressure is used to perform this inspection :-

(a) 15 psig hydrostatic pressure; (b) 15 psig pneumatic pressure;

(c) 5 psig hydrostatic pressure; (d) 5 psig pneumatic pressure.

REF : API 650 – 5.3.5

ANS : (b)

129) Repairs of cracks in the shell-to-bottom :-

(a) are only necessary if they exceed 0.25" in length;

(b) are performed on an individual basis, according to extent of damage;






36

(c) may be welded over and left as is without reinspection;

(d) both (b) and (c) above.

REF : API-653, 2.3.6

ANS : (b)

130) Resistivity of surrounding soil may be used to determine the probability ofcorrosion on tank bottoms. Which of the following resistivity ranges isconsidered to be very corosive :-

(a) < 500; (b) 500 – 1000; (c) 1000 – 2000; (d) < 10,000

REF : API 651 – 3.3.1.3 (Table – 1)

ANS : (a)

131) Rewelding vertical joints requires cutting horizontal welds back from the joint a minimum of ____ inches :-

(a) 1/2; (b) 1; (c) 2; (d) 12.

REF : API 653 Figure 7-1

ANS : (d)

132) Flame arresters are to be inspected :-

(a) semi-annually;

(b) annually;

(c) at intervals determined by experience locally;

(d) every 5 years.

REF : API Chapter XIII 13.4.2.11

ANS : (c)






37

133) Routine visual inspection by Owner / Operator personnel shall be done at

least :-

(a) annually; (b) bi-monthly; (c) monthly; (d) semi-annually.

REF : 653 4.3.1.2

ANS : (c)

134) With a vertical sweep board 36 inches long, banding on reconstructedtanks shall not exceed ____ inch(s) :-

(a) 1/2"; (b) 3/4"; (c) 1"; (d) 1 ½".

REF : API-653, 8.5.5

ANS : (c)

135) Scheduled external inspections shall be performed a tleast :-

(a) the lesser of every 5 years of 1/2 corrosion rate of the shell life;

(b) the lesser of every 5 years or 1/4 corrosion rate of the shell life;

(c) the lesser of every 10 years or 1/2 corrosion rate of the shell life;

(d) the lesser of every 10 years or 1/4 corrosion rate of the shell life.

REF : API 653 4.3.2.1

ANS : (c)

136) Seal material shall be placed :-

(a) between the outer periphery of the roof and the tank shell;

(b) around columns, ladders and gauge pipes that penetrate the deck;

(c) the seal shall be flexible;







38

REF : API 650 Appendix H.3.5

ANS : (d)

137) Shell penetrations experiencing corrosion must be assessed and :-

(a) tank rerated; (b) repair procedures established;

(c) tank removed from service; (d) both (a) and (b) above.

REF : API 653, 2.3.9

ANS : (d)

138) Small punctures in floating roof systems :-

(a) may be ignored if they have been determined to be non-critical;

(b) shall be repaired;

(c) shall be replaced;

(d) either (b) or (c) above.

REF : API-653 2.2.3.1

ANS : (d)

139) Tack welds shall be made using a procedure qualified in accordance with ASME Section IX :-

(a) Fillet weld; (b) Groove or fillet weld;

(c) Special; (d) Butt weld.

REF : 650 5.2.1.8

ANS : (b)

140) Tank grounding shunts shall be inspected :-






39

(a) visually; (b) infrared camera;

(c) by a certified electrician; (d) need no inspection.

REF : API 653, 4.3.2.4

ANS : (a)

141) Tanks reconstructed in accordance to API-653 shall be identified with acorrosion-resistant metal nameplate with letters not less than ____" high :-

(a) 5/32; (b) 7/32; (c) 9/32; (d) 3/32.

REF :-653, 11.1.1

ANS : (a)

142) Tests for leaks in reinforcing plate welds require ____ psig :-

(a) upto 2.5; (b) upto 15; (c) upto 21; (d) upto 30.

REF : API 653/10.4 & 650 5.3.5

ANS : (b)

143) The "critical zone" for tank bottom repairs is the area within the annularplate ring, within inches of the shell or within inches of the inside edge ofthe annular plate ring:-

(a) 12, 6; (b) 6, 12; (c) 12, 12; (d) 6, 6

REF : 653, 7.9.11

ANS : (c)






40

144) The "L" in actual thickness determination for each shell course :

(a) may be greater than 40";

(b) is valid only when corroded area is less than 40";

(c) applies even if corroded area is greater than L;

(d) requires converting "D" from feet to inches.

REF : API 653, 2.3.2.1 See Note

ANS : (c)

145) The 6 G position for welding is a :-

(a) Qualification position; (b) Production welding position;

(c) Rod position; (d) Rank position.

REF : IX QW-120

ANS : (a)

146) The API 653 standard covers the maintenance inspection, repairs,alteration, relocation and reconstruction of tanks constructed to which oneof the following standards :-

(a) ASME; (b) API 651; (c) API 65; (d) API 650.

REF : 653 1.1.1

ANS : (d)

147) The assessment period for inspection of tank bottom integrity is :-

(a) is always 5 years;

(b) is fixed by corrosion rate;

May exceed 40"






41

(c) less than or equal to the appropriate internal inspection interval givenin API-653 4.4.2

(d) determined by the designer.

REF : API-653, 2.4.1

ANS : (c)

148) The complete or partial removal and replacement of more than 12 inchesof a vertical weld joining shell plates is considered a :-

(a) minor alteration; (b) minor repair;

(c) major alteration; (d) major repair.

REF : 653 10.3.1.2 (c)

ANS : (d)

149) The definition of a confined space is :-

(a) large enough to enter;

(b) restricted means of entry;

(c) not designed for continuous occupancy;

(d) (d) all of the above are required.

REF : API 2015 1.4

ANS : (d)

150) The determining factor for intervals between internal and external

inspections :-

(a) Change of service to a higher specific gravity;

(b) Tank service history provided earlier inspection is not required byspecial reasons;

(c) Corrosion activity either known or suspected.






42

(d) Governmental regulations

REF : 653 4.4.2.1

ANS : (b)

151) The difference between peaking and banding is :-

(a) peaking pertains to the roof;

(b) banding is external to the tank;

(c) peaking pertains to vertical weld seams, banding pertains to horizontal

weld seams;(d) peaking pertains to horizontal weld seams, banding pertains to verticalweld seams.

REF : General Knowledge

ANS : (c)

152) The first checks for tanks out-of-service are :-

(a) (b) and (d) below; (b) cleaned, gas freed and safe for entry;

(c) hammer test the roof; (d) complete isolation.

REF : API 653 Table C-2.1 a & b

ANS : (a)

153) The flammable range is when a vapour exists :-

(a) above the ambient temperature;

(b) between the lower flammable limit and the upper flammable limit;

(c) between the extremes of the lower flammable limit;

(d) between the extremes of the upper flammable limit;

REF : API 20151.3.10






43

ANS : (b)

154) The formula for maximum bulge or depression of a tank bottom is :-

(a) B = 0.37 R, gives an Answer in feet;

(b) B = 0.37 R gives an Answer in inches;

(c) B + 0.37" is the minimum;

(d) B = 0.37 + R

REF : API 653 B.3.3

ANS : (d)

155) The general shape of gas cavities on a radiograph :

(a) appear darker in contrast wiht areas of defect-free material;

(b) are generally round in shape;

(c) are acceptable;

(d) both a and b.


ANS : (d)

156) The Heat Affected Zone is :-

(a) that portion of the base metal which has not been melted;

(b) whose mechanical properties or micro structures have been altered bythe heat of welding;

(c) is least likely to contain discontinuities;

(d) both (a) and (b) above.

REF : Section IX, QW-492

ANS : (d)






44

157) The inspection interval for a tank is determined by :-

(a) size; (b) service history;

(b) the manufacturer; (d) type of tank.

REF : 653 4.2.2

ANS : (b)

158) The lower flammable limit (LFL) is the concentration of a glammablevapour in air that will ignite :-

(a) approximate; (b) maximum; (c) average; (d) minimum.

REF : 2015 1.3.1

ANS : (d)

159) The maximum acceptable undercutting for base metal in repaired oraltered horizontal welds is :-

(a) 1/64"; (b) 1/32"; (c) 1/16"; (d) 1/8"

REF : API-653, 8.4.2.5

ANS : (b)

160) The maximum acceptable undercutting for base metal in vertical welds is:-

(a) 1/64"; (b) 1/32"; (c) 1/16"; (d) 1/8,

REF : API-653, 8.4.2.5






45

ANS : (a)

161) The maximum interval between internal inspections shall not exceed ____years :-

(a) 10; (b) 20; (c) 5; (d) 15.

REF : 653 4.4.2.1

ANS : (b)

162) The maximum spacing between settlement measurement points shall be :-

(a) 30 ft.; (b) 20 ft.; (c) 40 ft.; (d) 25 ft.

REF : 653 APP. “B”

ANS : (a)

163) The minimum dimension for replacement shell plate is 12 times t or ____inches :-

(a) 8; (b) 18; (c) 6; (d) 12.

REF : API 653 7.2.2.1

ANS : (d)

164) The minimum interval for external inspection by a qualified inspector is ____ years or at the quarter corrosion-rate life of the shell, whichever is less :-






46

(a) Twenty; (b) Five; (c) Ten; (d) Fifteen.

REF : API-653, 4.3.2.1, 4.4.2.1

ANS : (b)

165) The minimum size of a fillet weld is which of the following :-

(a) On plate 3/16 inch thick, the weld shall be a full-fillet weld, and onplates more than 3/16 inch thick, the weld thickness shall not be less than1/3 the thickness of the thinner plate at the joint and shall be atleast 3/16inch.

(b) On plate 5/16 inch thick, the weld shall be a full-fillet weld, and onplates more than 5/16 inch thick, the weld thickness shall not be less than1/3 the thickness of the thinner plate at hte joint and shall be atleast 3/16inch.

(c) On plate 3/16 inch thick, the weld shall be a full-fillet weld, and onplates more than 5/16 inch thick, the weld thickness shall not be less than1/3 the thickness of the thinner plate at the joint and shall be atleast 5/16inch.

(d) On plate 1/4 inch thick, the weld thickness shall not be less than 1/3the thickness of the thinner plate at the joint and shall be atleast 1/4 inch.

REF : API-650 3.1.3.3

ANS : (a)

166) The minimum thickness of an annular plate ring is usually greater than :-

(a) 0.10; (b) 0.25; (c) 0.0625; (d) 0.1875.

REF : 653 2.4.8.1 ANS : (a)

167) The permissible exposure limit (PEL) is the maximum ____ time-weighedaverage of any airborne contaminant to which an employee may beexposed :-






47

(a) 8 hour; (b) 24 hour; (c) 4 hour; (d) 1 hour.

REF : 2015 1.3.8

ANS : (a)

168) The proper method for dismantling tank bottoms that are to be reusedshall be cut by:-

(a) deseaming of lapwelds;

(b) cutting alongside remaining welds at a minimum of 2 inches from existingwelds;

(c) cutting alongside remaining welds at a minimum of 3 inches from existingwelds;

(d) Both (a) and (b) are acceptable.

REF : API 653-8.3.2.1

ANS : (d)

169) The purchaser has not specified the use of 1-foot method for calculating

thickness and L/H ≤ 2, therefore, what is the shell plate thickness for the firstcourse for the following tank design ?

Height = 40 feet

Diameter = 260 feet

Stress @ test condition = 30,000 psi

Specific gravity = 1.0

Course Length = 8 feet

Corrosion Allowance = 0

Joint Efficiency = .0

(a) 1.209"; (b) 1.171"; (c) 0.856"; (d) 1.038"






48

REF : 650 3.6.4.3 Table K-2

ANS : (c)

170) The purpose of electrical grounding of A/C power connections is :-

(a) protect against lightening; (b) corrosion control for tank bottoms;

(c) personal safety; (d) corrosion control for tank shells;

REF : API 651, 1.1.1

ANS : (c)

171) The root opening for square grooves for butt-welded bottom plate shall notbe less than :-


REF : API 650 – 3.1.5.5

ANS : (b)

172) The sequence of welding of the shell-to-bottom :-

(a) is the welder's option;

(b) is not addressed;

(c) is completed after the bottom joints are fully welded;

(d) must be completed before the welding of bottom joints.

REF : API-653, 8.4.3.2






49

ANS : (d)

173) The shell plate formula tmin =

(a) only (b) and (c) below;

(b) is only valid if tmin is not les than 0.1";

(c) applies only to tanks less than 200' in diameter;

(d) does not apply to riveted construction.

REF : API 653 2.3.3.1

ANS : (c)

174) The tank shall be cleaned and ____ prior to commencement ofdismantling :-

(a) gas-freed; (b) inspected; (c) surveyed; (d) cleaned;

REF : API-653, - 8.2

ANS : (a)

175) The thickness to be used for each shell course when checking the tankdesign after reconstruction shall be based on measurements taken within ____ days prior to relocation :-

(a) 45; (b) 90; (c) 180; (d) 360.

REF : API-653, 6.4.1

ANS : (c)

176) The types of tanks covered by API 653 are :-

(a) non-refrigerated;

(b) vertical, cylindrical, above ground closed and open top;

SE

G1)(hD2.6 −






50

(c) built to API 650 and 12 C;


REF : API 650-1.1.1 and 653-1.1.1

ANS : (d)

177) The upper flammable limit (UFL) is the concentration of a flammablevapour in air that will ignite :-

(a) approximate; (b) maximum; (c) average; (d) minimum.

REF : 2015 1.3.2

ANS : (b)

178) The variable design point method shall be used for tanks greater than ____ in diameter :-

(a) 50'; (b) 200'; (c) 150'; (d) 200'.

REF : API-653, 2.3.3.3

ANS : (d)

179) Thick-film internal linings :-

(a) are frequently used as an alternative to replacing the steel bottom;

(b) are prohibited from use as an alternative to replacing the steel bottom;

(c) removes the need for external cathodic protection;

(d) removes the need for external anodic protection.

REF : API 651 3.4.4

ANS : (a)






51

180) Thickness readings taken on a tank shell after 5 years of service show aminimum thickness of 0.420 inches. The data sheet shows the original

thickness as 0.5 inches. What is the corrosion rate for the tank :-

(a) 0.008; (b) 0.0016; (c) 0.016; (d) 0

REF : API-653 4.3.3.22

ANS : (c)

181) Three different methods of conducting "Visual Examinations" (VT) :-

(a) Direct, indirect and previously recorded;

(b) Translucent, direct and previously recorded;

(c) Translucent, direct and indirect or (remote visual examination)


REF : Sec. V, T940, T941, T942, T943

ANS : (c)

182) Three types of external inspections are :-

(a) scheduled, routine and liquid penetrant;

(b) scheduled, routine and UT thickness;

(c) scheduled out of service, routine and UT thickness;

(d) unscheduled, routine and liquid penetrant.

REF : API 653-4.3.1, 4.3.2 & 4.3.3

ANS : (b)

183) To be an alteration a nozzle must be :-






52

(a) 12" or greater NPS nozzles; (b) greater than 12" NPS nozzles;

(c) greater than 2" NPS nozzles; (d) greater than 10" NPS nozzles.

REF : API 653, 1.5.1 (a)

ANS : (b)

184) To be certified under the program which of the following educational andexperience requirements must be met :-

(a) A degree in engineering plus 6 months of experience in inspection oftanks, pressure vessels, or piping;

(b) A two-year certificate in engineering or technical college and two yearsof experience in construction, repair, operation, or inspection of tanks,pressure vessels or piping;

(c) The equivalent of a high school education and three years ofexperience in construction, repair, operation or inspection of which oneyear must be in inspection of tanks, pressure vessels or piping;

(d) Four years of experience in the inspection of above ground storagetanks in petroleum / chemical industries.

REF : 653 4.10

ANS : (c)

185) To evaluate tank settlement, elevation measurements are performed andcompared with measurements marked just after construction. Where arethese measurements made ?

(a) Tank circumference, tank height; (b) Tank diameter, tankheight;

(c) Tank height, tank base; (d) Tank circumference,tank diameter.

REF : API-653, Appendix B.2.

ANS : (d)

186) To qualify a GMAW, short circuit transfer, welding procedure :-






53

(a) Radiography may be used;

(b) Tension tests and transverse bend test are required;

(c) May be omitted if another manufacturer has a qualified WPS;

(d) Require bend tests only.


ANS : (b)

187) Top decks of external floating roofs (double deck or pontoon type) which

are designed with are designed with a permanent slope for drainage shallhave a minimum slope of ____ inch in 12 inches :-

(a) 3/16; (b) 1/2; (c) 1/4; (d) 3/8.

REF : API-650 APP-C C.3.3.4

ANS : (a)

188) Underun on plate not more than inch from the computed design thickness

or minimum permitted thickness is acceptable :-

(a) 0.01; (b) 0.02; (c) 0.03; (d) 0.04.

REF : API 650, 2.2.1.2.3

ANS : (a)

189) Unless otherwise agreed to by the purchaser, what is the minimumnominal width of a shell plate ?

(a) 36 inches; (b) 48 inches; (c) 72 inches; (d) 96inches.

REF : 650 3.6.1.2

ANS : (c)

190) UT examination methods shall be in acordance with :-

0.3mm/0.01"






54

(a) ASME Code Section V, Article 5;

(b) ASME Code Section II, Article 5;

(c) API 653;

(d) ASME Code Section IX, Article 2.

REF : 650 6.3.1

ANS : (a)

191) Vertical welds must be fully radiographed if the shell thickness exceedsinches :-

(a) 3/4; (b) 1; (c) 1 1/4; (d) 1 1/2.

REF : API-650 6.1.2.2 (C)

ANS : (b)

192) Visual examination shall be done in accordance with :-

(a) ASME Section V, Article 9;

(b) API 650;

(c) AWS Guidelines;

(d) ASME B-31.1, Chapter VI.

REF : 650 5.2.1.8 & 6.5

ANS : (b)

193) Welded joints that have experienced metal loss due to corrosion :-






55

(a) must be X-Rayed prior to further use;

(b) may be repaired by welding;

(c) may be repaired by grinding;


REF : API 653, 7.5.3

ANS : (b)

194) Welder identification is not required for :-

(a) lap welds; (b) corner joints;

(c) fillet welds around opening; (d) roof plate welds.

REF : 650 7.4

ANS : (d)

195) Welder or welding operator's identification marks shall be located adjacentto completed welds at intervals not exceeding :-

(a) 9 feet;

(b) 6 feet;

(c) 3 feet;

(d) As identified on the approved welding procedure specification.

REF : API 653 – 9.2.1

ANS : (c)

196) Welders qualifications shall expire as they do not weld :-

(a) within a given process for a 6 month period;

(b) using a given procedure for a 6 month period;

(c) on a tank for 6 months;

(d) for a 3 month period.






56

REF : IX QW-322

ANS : (a)

197) Welding filler metals are grouped into groupings based on their AWSclassification:-

(a) P-numbers; (b) F-numbers;

(c) Z-numbers; (d) ASTM spec.

REF : IX QW-432

ANS : (b)

198) Welding Procedure Specifications (WPS), and welders and weldingoperators must be qualified in accordance with ____ :-

(a) API-653; (b) API-650;

(c) Section V of the ASME; (d) Section IX of the ASME

REF : API-653, 9.1.1

ANS : (d)

199) Welding procedures are qualified in accordance with ____

(a) ASME Section IX, Art. 3; (b) ASME Section V, Art. 2;

(c) ASME Section IX, Art. 2; (d) AWS D-1.1

REF : IX Article 2

ANS : (c)

200) What are penetrameters used for :-






57

(a) A penetrameter is used for evaluating radiographic technique in that itserves as an image quality indicator;

(b) It indicates the magnetic properties of the materials;

(c) Is the same as penetration in Ultrasonic Inspection;

(d) both (a) and (c) above.

REF : SECTION V, T233, T262

ANS : (a)

201) What are the two general approaches for determining minimumthicknesses of tank bottom plate and briefly describe their differences :-

(a) Deterministic and Probabilistic;

(b) Probabilistic and Actualistic;

(c) Actualistic and Deterministic;

(d) Variable design and Actual thickness determination.

REF : API-653, 2.4.7

ANS : (a)

202) What are the two methods of guided-bend tests permitted by ASMESection IX ?

(a) Bottom ejection method and Wrap around method;

(b) Top ejection method and Bottom ejection method;

(c) Side ejection method and Wrap around method;(d) All to the above.

REF : Section IX, QW-162

ANS : (a)






58

203) What diameter bolt circle is required and how many bolts for a 24 inch roofmanhole?

(a) 26.0 inch diameter bolt circle and 18 bolts;

(b) 25.5 inch diameter bolt circle and 20 bolts;

(c) 27.5 inch diameter bolt circle and 16 bolts;

(d) 27.5 inch diameter bolt circle and 20 bolts.

REF : API 650 – 3.8.4

ANS : (d)

204) What F number is E70T1 electrodes classified as :-

(a) 1; (b) 2; (c) 4; (d) 6.

REF : QW-432

ANS : (d)

205) What is calcination :-

(a) An accumulation of a mineral coating on the lining of the tank;

(b) Increase of water of hydration;

(c) Loss of water of hydration;

(d) Form of tank deterioration.

REF : API-653, 2.5.1.2

ANS : (c)

206) What is meant by "non destructive examination" of a welded joint ?

(a) An examination of a welded joint that will disclose surface and sub-surface discontinuities without physical harm to the welded joint;

(b) An examination of a bolted joint;

on concrete






59

(c) An examination of a welded joint that will disclose surface and sub-surface discontinuities that may cause physical harm to the welded joint.

(d) An examination of a welded joint that will disclose only surfacediscontinuities without physical harm to the welded joint.

REF : Section V, T110

ANS : (a)

207) What is MRT2 as used by the deterministic method ?

(a) Minimum remaining thickness due to maximum internal pitting andaverage external pitting;

(b) Maximum remaining thickness that can be used for calculations;

(c) Maximum reported thickness minus all corrosion;

(d) Minimum remaining thickness due to average internal p itting andmaximum external pitting.

REF : 2.4.7.1

ANS : (a)

208) What is the 42 gallon barrel capacity of a tank 110 feet in diameter, 24 feethigh, joint efficiency is 0.85, specific gravity = 1.0, corrosion allowance =0.

(a) 34,303; (b) 38,909; (c) 39,910; (d) 40,656.

REF : API 650 – Appendix A Table A-1 C = 0.14D2H

ANS : (d)

209) What is the allowable stress at root of anchor bolt threads for a tank with adesign pressure upto 2.5 psig ? Uplift is based on tank design pressureand wind.

(a) 15,000; (b) 20,000; (c) 25,000; (d) 30,000.

REF : API 650 – F.7, Table F-1

ANS : (b)






60

210) What is the capacity of a tank 110 feet in diameter, 24 feet high, jointefficiency is 0.85, specific gravity is 1.0, corrosion allowance = 0 ?

(a) 34,303; (b) 38,909; (c) 39,910; (d) 40,656.

REF : 650 Table A-1

ANS : (d)

211) What is the distance from the centre pipe to shell for a 3 inch nominal pipesize, 36 diameter drawoff sump, which is 18 inched deep ?

(a) 2.1875'; (b) 3.2343'; (c) 5.0000'; (d) 5.3780'

REF : API 650 - 3.8.6

ANS : (c)

212) What is the distance in inches, that both a roof plate or a shell bottommust be cut from the weld when dismantling a shell tank :-

(a) One; (b) Two; (c) Four; (d) Six.

REF : API-653, 8.3.2; API-653, 8.3.4.1

ANS : (b)

213) What is the expected service life for a properly applied tank bottom lining ?

(a) 5 – 10 years; (b) 10 – 15 years;

(c) 10 – 20 years; (d) 20 – 30 years.

REF : API 652 3.6 and 8.1 ANS : (c)

214) What is the flammable range for Methane ?

(a) 1 – 5; (b) 2 – 8; (c) 2 – 9; (d) 5 – 15.






61

REF : 2015 – 3.2 (Table – 1)

ANS : (d)

215) What is the maximum acceptable undercutting of new constructed basemetal for vertical butt joints ?


REF : API 650 - 5.2.1.4

ANS : (d)

216) What is the maximum acceptable undercutting of new construction basemetal for horizontal joints ?


REF : API 650 – 5.2.1.4

ANS : (c)

217) What is the maximum depth of a depreciation, oval in shape, whichmeasures 18 feet long by 11 feet wide ?

(a) 6.6"; (b) 24.42"; (c) 4.07"; (d) 2.035".

REF : 653 APP. “B” B-5

ANS : (d)

218) What is the maximum depth of edge settlement if the distance from theinside of the shell to the bend point of the depression is 7 feet ?

(a) 2.59"; (b) 1.295"; (c) 5.18"; (d) 31.08".

REF : 653 APP. “B”

ANS : (a)






62

219) What is the maximum interval between external UT thickness

measurements for a tank, given the following information ? Remaining CA= 0.064", Corrosion rate is 0.008" per year.

(a) 5 yrs; (b) 4 yrs;

(c) 8 yrs; (d) 3 – 1/2 yrs.

REF : 653 4.3.3.2

ANS : (b)

220) What is the maximum out-of-plumbness of a new tank from the top of shellrelative to the bottom of the shell ?

(a) 1/100 of the total tank height; (b) 1/50 of the total tank height;

(c) 1/60 of the total tank height; (d) 1/200 of the total tank height.

REF : API 650 – 5.5.2

ANS : (d)

221) What is the maximum reinforcement allowed on a 1/2" thick vertical butt

weld made on a reconstructed tank ?(a) 3/16; (b) 3/32; (c) 1/8; (d)

1/4.

REF : API-653, 8.4.2.6

ANS : (b)

222) What is the maximum spacing between settlement measurement points ?

(a) 20 feet; (b) 30 feet; (c) 35 feet; (d) 50 feet.

REF : API 653 – 10.5.1.2

ANS : (b)

223) What is the maximum thickness of weld reinforcement for a 0.5625 inchplate ?






63

(a) 1/16; (b) 3/32; (c) 1/8; (d) 3/16.

REF : API 650 – 6.1.3.4

ANS : (b)

224) What is the minimum acceptable shell plate thickness for a tank shellmade of A 283 grade C material, 70 feet in diameter and 50 feet high ?Specific gravity of contents is 0.8. Original joint efficiency was 100 %.

(a) 0.356; (b) 0.339; (c) 0.480; (d) 0.304.

REF : API-653 2.3.3.1

ANS : (d)

225) What is the minimum allowable density through the image of thepenetrameter for radiographs made with a 2000 kv tube ?

(a) 1.8 – 4.0; (b) 1.3 – 2.8; (c) 2.0 – 4.0; (d) 1.3 – 1.8;

REF : Sec. V, T-282.1 ANS (a)

ANS : (b) 2.0 – 4.0 (for any gamma source – anything besides a tube)

REF : Sec. V, T-282.1

226) Windgirders are evaluated for :-

(a) Corrosion of structural elements; (b) attachment welds;

(c) the same evaluation as for shell stiffeners; (d) all of the above.

REF : API 653 2.3.7 ANS : (d)

227) What is the minimum nominal shell thickness required when the normaltank diameter is less than 50 feet ?






64

(a) 3/16; (b) 1/4; (c) 5/16; (d) 3/8.

REF : API-650 3.6.1.1

ANS : (a)

228) What is the minimum nominal thickness for bottom plates, exclusive of anycorrosion allowance ?


REF : 650 3.4.1 ANS : (b)

229) What is the minimum number of settlement measurement points ?

(a) 4; (b) 6; (b) 8; (d) 10.

REF : API 653 – 10.5.1.2

ANS : (c)

230) What is the minimum permissible design metal temperature for a 280 footdiameter tank, 75 feet high, tank radius is 1,680 inches, plate materialordered is 1.125" (including corrosion allowance) A 516 – 555 as rolled,killed fine-grain practice without impact testing :-

(a) + 8; (b) 0;

(c) – 4; (d) All Material must be impact tested.

REF :API 650 - 2.2.9.2 (Fig. 2-1)

ANS : (c)

231) What it the minimum permitted density of radiographic film using anIridium source ?

(a) 2.0; (b) 1.8; (c) 1.3; (d) 4.0






65

REF : V-T282.1

ANS : (a)

232) What is the minimum required number of settlement measurement pointsfor a 200' diameter tank ?

(a) 10; (b) 8; (c) 21; (d) 20.

REF : API 653 – 10.5.1.2

ANS : (c)

233) What is the minimum thickness of bolting flange and cover plate for a 24 ×24 size flush-type cleanout to be installed in a tank having maximum height of 53 feet :-

(a) 1/16; (b) 1/8; (c) 3/16; (d) 9/16.

REF : API 650 – 3.7.7 (Table 3-12)

ANS : (d)

234) What is the calculated minimum thickness of shell plates from the stresson vertical joints for a field-erected small capacity tank, which has adiameter of 30 feet, height of 36 feet, joint efficiency is 0.85, specificgravity is 1.0, with a corrosion allowance of 0.125 ?

(a) t = 0.1529; (b) t = 0.1875;

(c) t = 0.2779; (d) t = 0.3125.

REF : API 650 – A.4 (See 3.6.1.1) ANS : (c)

235) What is the minimum weld length that must be shown on

each radiograph ?






66

(a) 2 inches; (b) 3 inches; (c) 4 inches; (d) 5 inches.

REF : API 650 – 6.1.2.8

ANS : (b)

236) What is the most common protective cushion for aboveground storagetanks ?

(a) Clean sand; (b) Clay; (c) Gravel; (d) Carbonaceous.

REF : API – 651, Section 3 ANS : (a)

237) What is the nominal shell thickness required when the nominal tankdiameter is less than 50 feet ?


REF : 650 3.6.1.1

ANS : (a)

238) What is the radii tolerance measured at 1 foot above the shell to bottomfor a reconstructed 125 foot diameter tank ?

(a) +/- 1/2; (b) +/- 3/4; (c) +/- 1; (d) +/- 1 1/4.

REF : 653 8.5.3

ANS : (b)

239) What is the title of API Publication 2015A ?






67

(a) "Guide for Controlling the Lead Hazard Associated with Tank Entry andCleaning."

(b) "Cleaning Open-Top and Covered Floating-Roof Tanks"

(c) "Guidelines for Confined Space Work in the Petroleum Industry"

(d) "Welded Steel Tanks for Oil Storage"

REF : API-653, 1.6

ANS : (a)

240) What must be done to the tank prior to dismantling to insure properalignment after the tank is reconstructed ?

(a) Atleast four sets of matching centre punch marks should be placed atthe top and bottom edges of each shell plate.

(b) Atleast two sets of matching centre punch marks shall be placed at thetop and bottom edges of each shell plate.

(c) Atleast three alignment tabs shall be tack welded to the top andbottom edges of the each shell plate.

(d) Atleast two sets of matching centre punch marks may be placed at thetop and side edges of each shell plate.

REF : API-653, 8.3.5.2

ANS : (b)

241) What are NDE methods and to what extent shall they be used for theexamination of repairs to butt welds ?

(a) MT and PT over full length; (b) MT and PT spot;

(c) UT and RT over full length; (d) UT or RT over full length.

REF : API 653 – 10.1.3.2

ANS : (d)

242) What of the following are not principal causes of shell distortion :-






68

(a) Thinning caused by corrosion; (b) Foundation settlement;

(c) Over-or under-pressuring; (d) High wind.

REF : API-653, 2.3.5

ANS : (a)

243) What percentage of selected spot radiography shall be at junctions ofvertical and horizontal joints ?

(a) 15 %; (b) 20 %; (c) 25 %; (d) 50 %.

REF : API 650 – 6.1.2.2 ANS : (c)

244) What size diameter cover plate is required for a 20 inch roof manhole ?

(a) 22 inch; (b) 24 inch; (c) 26 inch; (d) 28 inch.

REF : API 650 3.8.4

ANS : (c)

245) What size penetrameter is required for RT of a tank 0.75 inches thick ?

(a) 17; (b) 20; (c) 25; (d) 1.

REF : ASME V Article 2

ANS : (a)

246) What spacing must be used for a settlement survey of a 100’ diametertank ?

(a) 31.4’; (b) 30’; (c) 28.56’; (d) 31’4”.






69

REF : API 653 2.3.3.1

ANS : (c)

247) When a new nameplate is attached, the existing nameplate :-

(a) is removed;

(b) is covered by the new name plated;

(c) is located next to the new name plate;

(d) is left for the owner / user to keep on file

REF : API-653, 11.1.2

ANS : (c)

248) When alternative inspection intervals are selected, the owner / user :-

(a) shall document the procedure and make it part of the permanentrecord;

(b) alternatives are not allowed;

(c) alternative method shall include method for determining bottom platethickness;

(d) both (a) and (c) above.

REF : API 653 4.4.3

ANS : (d)

249) When calculating the maximum liquid level for reconstructed tanks, therequired corrosion allowance shall be :-

(a) deducted from the actual thickness before calculating maximum liquidlevel;

(b) added to actual thickness before calculating maximum liquid level;

(c) not be considered when calculating maximum liquid level;

(d) deducted from the original design thickness.






70

REF : API 653 – 6.4.4

ANS : (a)

250) When changing a non-essential variable on a welding procedure, theprocedure must be :-

(a) revised; (b) requalified;

(c) no action required; (d) re-written as a new procedure.

REF : IX QW-200.1 ANS : (a)

251) When concrete ringwalls are provided under the shell, the top of theringwall shall be level with ______ inch in the total circumferencemeasured from the average elevation :-

(a) 1/4; (b) 1/8; (c) 3/8; (d) 5/16.

REF : API 650 – 5.5.5.2 a

ANS : (a)

252) When determining average thickness in a corroded area of a shell, aminimum of equally paced measurements shall be taken over a length ofL.

(a) 10; (b) 5; (c) 8; (d) 6.

REF : 653 2.3.2.1 (c)

ANS : (b)

253) When evaluating roof support systems, special attention should be paid to:

(a) Rafters; (b) Prior repairs;

any change in PQR requires requalification






71

(c) Distortions; (d) The possibility of severe internal corrosion of pipecolumns.

REF : API – 653, 2.2.2

ANS : (d)

254) When is pitting an important factor in determining tank shell acceptability ?

(a) When pits are 1/4" in diameter;

(b) When the pits are 1/8” in diameter.

(c) When the pits are present in a severe form in close proximity.

(d) Pitting always represents a significant threat.

REF : API-653, 2.3.1.3; 2.3.2.2

ANS : (c)

255) When liquid penetrant is specified, the method of examination shall be inaccordance with one of the following :-

(a) ASME, Section V, Article 6; (b) API-650, Section 6;

(c) API-653, Section 6; (d) ASME, Section 8, Article 6.

REF : 650 6.4.1

ANS : (a)

256) When preparing the surface for lining, the abrasive blasting should not beperformed if the temperature of the steel surface is less than ____ abovethe dew point or if the relative humidity is greater than ____ %.

(a) 10 degrees, 75 %; (b) 5 degrees, 80 %;

(c) 10 degrees, 80 %; (d) 5 degrees, 75 %.

REF :API-652, 5.4

ANS : (b)






72

257) When replacing rim-mounted shoe seals on a floating roof, no more than

____ of the seal should be out of service at any one time.

(a) 1/4; (b) 1/2; (c) 1/3; (d) 1/8.

REF : API-653 7.12.1

ANS : (a)

258) When required, a set of Charpay V-notch impact specimens shall be taken:-

(a) Before heat treatment; (b) After heat treatment;

(c) Either before or after; (d) Both before and after heat treatment.

REF : API 650 2.2.8.1

ANS : (b)

259) When required, how long shall a full hydrostatic be held ?

(a) 18 hours; (b) 24 hours; (c) 36 hours; (d) 38 hours.

REF : API 653 – 10.3.1.1

ANS : (b)

260) When reusing the entire bottom in the intact condition, the shell cut shallbe a minimum of ____ inch(es) above the top of the bottom plate :-

(a) 1/2; (b) 6 except where crossing existing welds;

(c) 12; (d) 12 is the maximum.

REF : API 653 8.3.2.2

ANS : (c)






73

261) When reviewing a radiograph, a dark image of the letter B can be seen onthe film

(a) This is cause for rejection;

(b) This is not cause for rejection;

(c) This is the same as a light letter B;

(d) An unusual safety hazard existed during the exposure.


ANS : (b)

262) When the corrosion rate is not known or determinable from similar serviceexperience, actual bottom plate thickness shall be determined byinspection within the next ____ years of operation :-

(a) 10; (b) 7; (c) 5; (d) 3.

REF : 653 4.4.2.2

ANS : (a)

263) When the tank is out of service, additional bottom plate examination

includes :-

(a) All of the below; (b) ultrasonic;

(c) hammer testing; (d) turning of coupons.

REF : API 653 Appendix C, C.1.1.4

ANS : (a)

264) When two (2) welders weld opposite sides of the same butt joint :-

(a) 2 spot radiographs shall be taken;

(b) heat generated by twin arc removes the need to radiograph;

(c) shall be inspected by ultrasonics;

(d) 1 spot radiograph shall be taken .






74

REF : API 650 – 6.1.2.5

ANS : (d)

265) When two or more tanks are installed concurrently in the same location forthe same purchase :-

(a) spot radiographs to be taken is based on each tanks footage of thewelds;

(b) spot radiographs may be omitted in tank # 2 if no defects were found intank # 1;

(c) spot radiographs may be taken based on the aggregate footage of thewelds of the same type and thickness;

(d) spot radiographs to be taken be based on the aggregate footage of thewelds regardless of weld type and thicknesss;

REF : API 650 – 6.1.2.5

ANS : (c)

266) When ultrasonic thickness measurements are used to take in-servicethickness measurements, what is the maximum interval for reinspection

on a tank corroding at a rate of 1.13 mils per year and has a remainingcorrosion allowance of 22 mils ?

(a) 5 years; (b) 9 years; (c) 15 years; (d) 20 years.

REF : API 653 – 4.3.3.2

ANS : (b)

267) When used, in-service UT thickness measurements shall be taken :-

(a) 10 years after commissioning;

(b) 15 year intervals where corrosion rate is unknown;

(c) the smaller of RCA/2N or 15 years;


REF : API 653 4.3.3.2






75

ANS : (c)

268) When vacuum testing is performed, a partial vacuum of at least psigshould be used :-

(a) 2; (b) 3; (c) 4; (d) 5.

REF : 650 5.3.3.4

ANS : (a)

269) Which below best describes how surfaces shall be prepared for Ultrasonicexamination :-

(a) The finished contact surfaces shall be free from weld splatter and anyroughness that would interfere with free movement of the search unit orimpair the transmission of ultrasonic vibrations;

(b) The weld surfaces shall be finished so they cannot mask or beconfused with reflections from defects, and should merge smoothly intothe surfaces of the adjacent base materials;

(c) The volume of base material through which the sound will travel in

angle beam examination shall be completely scanned with a straight beamsearch unit to detect reflectors which might affect interpretation of anglebeam results;


REF : Section V, T-542.7.1

ANS : (d)

270) Which below option Thin-Film lining system shall be used for the following

service conditions; Temperature 200 degrees F, product contents aredistillates,

(a) Coal tar epoxy; (b) Epoxy amine;

(c) Epoxy polyamide; (d) Epoxy Polyamidoamine






76

REF : API 652 – 4.3, Table 1

ANS : (b)

271) Which is not a factor in determining intervals between internal inspectionsfor storage tanks :-

(a) Measured during previous inspection;

(b) Based on experience with similar tanks;

(c) Anticipated corrosion rate;

(d) Consistent with conditions at a particular site.

REF : API-653, 4.4.2

ANS : (d)

272) Which item is not found on a gauge well ?

(a) hold-off distance; (b) marker vapour control float;

(c) blow-down valve; (d) pipe seal system.

REF : API 653, Appendix C.2.1.1.1

ANS : (c)

273) Which of the following equations refer to an anodic reaction :-

(a) O2 + 2 H2) + 4 e- > 4 OH-

(b) Fe + 2 e- ____ Fe2

(c) H2O2 + Fe > 2 e

(d) Fe --> Fe-2 +2 e-

REF : API-651, 2.1.1

ANS : (d)

274) Which of the following is a cause for tank bottom failure ?






77

(a) Erosion corrosion; (b) Concentration Cell corrosion;

(c) Sulphate-reducing bacteria; (d) All are causes.

REF : API-652, Section 2

ANS : (d)

275) Which of the following is a factor in the effectiveness of cathodic protection:-

(a) Concrete foundation;(b) An impervious lining between tank anode such as a secondarycontainment system

(c) High resistance soil or rock formations;

(d) All are factors.

REF : API-651 3.1.4

ANS : (d)

276) Which of the following is a principle cause of concrete foundationdeterioration :-

(a) Attack by frost; (b) Rusting; (c) Wind load; (d) Floods.

REF : API-653, 2.5

ANS : (a)

277) The difference between peaking and banding is :-

(a) peaking pertains to the roof;

(b) banding is external to the tank;

(c) peaking pertains to vertical weld seams, banding pertains to horizontalweld seams

(d) peaking pertains to horizontal weld seams, banding pertains to verticalweld seams.






78


ANS : (c)

278) Which of the following is not a cause of bottom failure :-

(a) Stresses placed on the bottom plates by roof support loads and shellsettlement;

(b) Inadequate drainage;(c) Rock or gravel foundation pads with inadequately filled-in surfacevoids;

(d) Operating conditions.

REF : API-653, 2.4.2

ANS : (d)

279) Which of the following is not a factor in determining suitability for service of

shell tanks :-

(a) Internal corrosion due to the product or water bottoms;

(b) Location relative to other tanks;

(c) Chemical analysis and mechanical properties of the materials ofconstruction;

(d) Tank foundation, soil and settlement conditions.

REF : API-653, 2.1.3

ANS : (b)

280) Which of the following is not a shell distortion ?

(a) undersize weld; (b) out of roundness;






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(c) flat spots; (d) buckled areas.

REF : API 653, 2.3.5.1

ANS : (a)

281) Which of the following is not required information on a nameplate :-

(a) Edition and revision number; (b) Shell material for shell course;

(c) Nominal diameter; (d) Test Pressure.

REF : API-653, 11.1.1

ANS : (d)

282) Which of the following is not true regarding dismantling of the shell :-

(a) Temporary attachments welds must be ground flush;

(b) Shell stiffener rings, including wind girders and top angles, may beremoved;

(c) Shell stiffener rings, including wind girders and top angles, may be leftattached;

(d) Temporary attachments welds need not be ground flush.

REF : API-653, 8.3.3.2

ANS : (d)

283) Which of the following is not true regarding small punctures in a floatingroof plate :-

(a) May be ignored if they have been determined to be non-critical;

(b) Shall be repaired;

(c) Shall have affected sections replaced;






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(d) Is considered a change from the original condition.

REF : API-653 2.2.3.1

ANS : (a)

284) Which of the following types of welds do not need welder identification ?

(a) Shell vertical welds; (b) Roof Plate welds;

(c) Flange-to-nozzle-neck welds; (d) Both (b) and (c)

REF : API-653, 9.2.2

ANS : (d)

285) Which thin-film lining system shall be used for the following serviceconditions : Temperature 200 degrees F, product contents are distillates :-

(a) Coal tar epoxy; (b) Epoxy amine;

(c) Epoxy polyamide; (d) Epoxy polyamidomine.

REF : 652 4.3 Table 1

ANS : (b)

286) Which tool would least likely be used in an in-service inspection ?

(a) UT thickness device; (b) X-ray equipment;

(c) Steel rule; (d) paint or crayon.

REF : API Chapter XIII 13.4.1

ANS : (b)






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287) Who is responsible for preparing the Welding Procedure Specification ?

(a) Purchasing; (b) Erector / Manufacturer / Repairer;

(c) Weld Testing Laboratory; (d) A qualified welder

REF : IX QW-200.1

ANS : (b)

288) Who is responsible for qualifying the welders used to repair an aboveground storage tank ?

(a) The tank manufacturer; (b) The repair concern;

(c) The inspector; (d) The test laboratory.

REF : IX QW-103.1

ANS : (b)

289) Who is responsible for stating the design metal temperature (based onambient temperatures), the design specific gravity, the corrosion

allowance (if any), and the design wind velocity ?

(a) PURCHASER; (b) FABRICATOR;

(c) INSPECTOR; (d) ERECTOR.

REF : 650 XIII

ANS : (a)

290) Widely scattered pits may be ignored provided that the sum of theirdimensions along any vertical line does not exceed 2 inch in an 8 inchlength and no pit depth results in a shell thickness of less than of theminimum thickness exclusive of corrosion allowance :-

(a) 5/8; (b) 3/4; (c) 1/2; (d) 2/3.




REF : API-653 2.3.2.2

ANS : (c)

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