guide questionnaires for seafarers · 2016-08-18 · 47. helical gears are preferred over spur...

MANAGEMENT – ENGINE

REPUBLIC OF THE PHILIPPINES

DEPARTMENT OF TRANSPORTATION

MARITIME INDUSTRY AUTHORITY STCW OFFICE

GUIDE QUESTIONNAIRES

for seafarers

The Annual Publication of Database of Questionnaires is mandated in Republic Act 10635 or the Act Establishing the Maritime Industry Authority (MARINA) as the Single Maritime Administration Responsible for the Implementation and Enforcement of the 1978 International Convention on Standards of Training, Certification and Watchkeeping for Seafarers, 1978, as amended and International Agreements or Covenants related thereto and its Implementing Rules and Regulations. These sample questions have been reviewed and validated by our respective Board of Examiners which may serve as a guide for the review of aspiring Marine Deck and Engineering Officers, towards the successful completion of the Theoretical Examination. The following sample questions do not reflect the actual set of database of questions given during the theoretical examination. Examinees are encouraged to study the contained sample questions and probable answers as they are intended to give an indication of the format and difficulty level of the theoretical examination. You may access these guide questionnaires with your smart gadgets anywhere and anytime at your convenience. Please consider the environment before printing. Thank you.

A Publication of the MARINA STCW Office


FUNCTION 1 – Competence 3 1. A seven cylinder, two-stroke/cycle, single acting diesel engine with a

cylinder indicated horsepower calculated as 1350 kW and brake horsepower measured at 7466 kW. What is its mechanical efficiency?

2. What is usually measured in seconds redwood or degrees angles from a

measurement using standard apparatus in which a given quantity of the fuel oil is run through a standard orifice at a given temperature?

3. The cold storage room for meat shall be maintained at _______. 4. Which device maintains systems pressure by compensation and shock

absorption? 5. Which of the following statements is true concerning the water level

indicating devices used with an auxiliary boiler? 6. Modern day boiler automation allows bypassing the flame safeguard

system to permit a burner to have a trial for ignition period during burner light-off. This period may not exceed ______.

7. To effectively limit the load of diesel engines, which of the following

components below must governors be equipped with? 8. Setting the relief valve opening pressure in a hydraulic system lower

than the required operating pressure will result in_____. 9. If one hydraulic pump of an electro-hydraulic steering unit fails, the

vessel’s steering can be initially and best maintained by using the ______.

10. The component which is used to thoroughly separate small particulate

contamination from hydraulic fluid is a/an_____. 11. Fuel injection systems meter fuel, atomize fuel and ____________. 12. Where is the degree of fuel oil atomization dependent upon? 13. If there is a change in the degree of fuel atomization in a diesel engine,

what could be greatly affected in the combustion process?


14. New piping and tubing to be installed in a hydraulic system can be safely degreased by using_______.

15. If the fires in a steaming boiler have been extinguished accidentally, you

should not relight any burner until_____. 16. What do we call the storage tank for liquid refrigerant? 17. Overheating of the oil in a hydraulic system can be caused by

_______________. 18. The bourbon tube-type pressure gage will begin to straighten out when

pressure is applied due to the ____. 19. In normal condition, when do you start operation of the fresh water

generator? 20. At what RPM percentage should the compressor side of the turbo

charger be washed? 21. When does the highest pressure in a diesel engine cylinder normally

occur? 22. A solenoid valve in the boiler fuel oil supply line will close when the

____________. 23. Which device can be used to secure or hold furnace refractory in

position? 24. Two-element feed water regulators operate by sensing _____. 25. What is the most probable cause if the gage glass water level remains

constant in a steaming boiler while maneuvering? 26. Failure of the burner flame in an automatic auxiliary boiler would

probably be a result of __________. 27. How a vacuum is initially created in a flash type distilling plant? 28. What is the most effective method in removing water from diesel fuel oil? 29. How is the vessel's steering initially and best maintained if one hydraulic

pump of an electro-hydraulic-steering unit fails?


30. Diesel engine cylinder head test cocks are used to _____________. 31. Which of the listed operational checks should be continuously made on

the main propulsion reduction gears? 32. Before starting a diesel engine, you should always _____________. 33. Which of the following actions listed below, should be taken if the water

gage glass on a steaming boiler breaks? 34. What control procedures must be done before putting into operation a

steam driven cargo pumps? 35. As engine RPM is increased from idle speed to full load speed, which of

the conditions listed will decrease? 36. In the event of a failure of the pneumatic control system, a multi-element

feed-water regulator is designed to operate as a _____________. 37. When there is an increase in load on your boiler, what is needed to

attain a good combustion? 38. Operating a propulsion diesel engine at less than 30% of designed

normal load for prolonged periods will result in _____________. 39. Before opening any part of refrigeration system for maintenance, what

precaution must be taken? 40. What do you call a procedure where main systems such as propulsion

system, electric power generation, steering gear, cargo handling systems, fire systems and auxiliary systems is subjected to a comprehensive testing program to verify the actual condition versus the design condition?

41. One of the main differences between the various types of screw pumps

is in the ________ . 42. Which device converts hydraulic and pneumatic energy into mechanical

working energy? 43. Oil mist detector is used to detect an oil mist formation in the engine

crankcase caused by _________.


44. Thermostatic steam pressure reducing valves are used in the fuel oil

service system to control the ____________. 45. When fuel oil heaters are required for main engine operation,

_______________. 46. On tank vessels equipped with power operated cargo tank valves, the

type of power actuator most commonly used is __________. 47. Helical gears are preferred over spur gears for reduction gear units due

to the fact that they _______. 48. Which of these is NOT an application of accumulator? 49. When the hydraulic control lever for deck winch is placed in the neutral

position, the spring set brake on the fluid motor drive shaft is ___________.

50. What is the purpose of after coolers in air compressors? 51. Information on the data-logger can be helpful in determining the long

term probability of machinery failure if you __________. 52. The purging point on some compressors in low pressure refrigeration

systems is connected to the ________. 53. In the vapor compression cycle of a closed system, after the liquid

refrigerant flows through the condenser it will then pass to __________. 54. A sulfite test is performed on water boiler to determine the amount of

__________. 55. What control procedures must be done before putting into operation a

steam driven cargo pumps? 56. Excessive side clearance between a piston ring and its groove will cause

the ring to____________. 57. Which of the following conditions listed below is responsible for the fuel

oil to atomize when using a steam atomizer in an auxiliary boiler?


58. For a continuous operation of diesel engine, why is it that the use of a duplex filter unit would be the best arrangement?

59. The fuel oil meter in the fuel oil service system should be bypassed

when __________. 60. Which of these is known as normally open pressure control valve? 61. Excess air must be provided to an operating boiler to allow for

____________. 62. In water cooled stern tube, a slight leakage of water across the packing

gland is provided to _____. 63. What kind of damage will occur as a result of a serious leak in the air

ejector condenser assembly? 64. While attempting to read a tank level indicator, the mercury column

drops rapidly. What does this indicate? 65. If a burner were inserted too far into the boiler furnace, it would lead to

poor combustion and carbon deposits will be created at the ___________.

66. A turbocharger is an air compressor driven by__________. 67. What are the two most common gases used in pneumatic systems? 68. What is the indication of distortion on the spray pattern of a nozzle or

injector? 69. The solenoid valves in the fuel oil supply line to an automatically fired

auxiliary boiler are automatically closed by ____________. 70. The liquid refrigerant which is stored in the liquid receiver is at ______. 71. What is the most important property of lubricating oil for reciprocating air

compressor? 72. After a normal firing, you should check for a/an __________. 73. What is the device used to keep moisture from passing through the

system?


74. What is an intense discrete frequency sound radiating from the propeller

and is much like a steady bell tone? 75. Which of the following is a kind of over speed trip that is fitted to the

engine? 76. Which of the following device is used to set the maximum pressure in a

hydraulic system? 77. What is/are the elements that control/s the desired temperature in the

outlet of a jacket cooling cooler through the bypass controller? I. Air II. Oil III. Electric

78. What is the indication of a bubble forming in the sight glass in the liquid

sight flow indicator of an R-22 refrigeration system? 79. What is the first alarm that will sound before the diesel engine stop due

to lube oil pressure? I. high pressure alarm II. cut - out pressure alarm III. low lube oil pressure

80. An air conditioning system with clogged filters will have which one of the

following conditions? 81. To ensure that a refrigeration unit will not start while undergoing repairs,

you should_____________. 82. Which of the listed operational checks should be continuously made on

the main propulsion reduction gears? 83. In order to start a large, low-speed, main propulsion diesel engine on

high viscosity fuel after an extended shutdown, the ________________. 84. In which of the listed hydraulic systems below will the installation of an

oil cooler be necessary? 85. What requirements have to be met to carry out a cold standby starting

on marine diesel oil? 86. If a severe leak develops in the electro-hydraulic steering gear, which of

the listed conditions could result?


87. Which of the following is the most common cause of machinery

vibrations when the vessel is maneuvering? 88. After changing out the fuel filters, the diesel engine fails to restart. What

is the probable cause of this condition? 89. In order for microbiological growths to thrive in fuel tank, it is necessary

for _______________ . 90. How will you avoid acid corrosion of the economizer tubes when blowing

tubes? 91. Which of the following is operated from the main engine room console

on an automated ship? 92. In preparing the boiler for survey, it should be cooled down slowly and

when pressure gauge registers zero. Which of the following should be opened to avoid formulation of a vacuum?

93. A hydraulic fluid flow control circuit, controlling linear actuator speed

during extension with the pump operating at system pressure, is known as______.

94. Which of the combustion parameters listed below is used in a diesel

engine, but NOT related to the injection system? 95. Rotation of the steering wheel on the navigation bridge initiates oil

pressure being applied to the steering gear rams by _______. 96. The loss of efficiency thus an increase in absorbed power and a lower

speed is the result of the accumulation on the propeller by_____. 97. With regards to fluid flow control, an advantage of pneumatic control

systems over electrical control system is ___________. 98. When there is no movement of the rams on an electro-hydraulic steering

gear, the tilting box of the running pump is ______. 99. In sewage treatment, the term maceration refers to the process of

_____________ .


100. Before opening any part of refrigeration system for maintenance, what precaution must be taken?

101. One function of burner atomization steam is to ___________. 102. The function of the hydraulic telemotor transmitter used in an electro-

hydraulic steering gear system is to ____. 103. What is the purpose of a restrictor valve as it is used in a hydraulic hatch

cover system? 104. A pneumatic pressure tank is installed in a sanitary system to

_____________ . 105. The fins on the tubes of a fin type fuel oil heater are provided to

_____________. 106. The flash chamber attached to the auxiliary boiler_____. 107. What is the purpose of turning a main propulsion diesel engine with the

cylinder test cocks open prior to starting? 108. The rate of the fuel injection in a diesel engine cylinder depends

primarily on ____________. 109. Excessive accumulation of carbon deposits on a boiler burner throat ring

and diffuser could result in ______. 110. What is the highest steam temperature to which fusible plugs may be

exposed? 111. The air supplied to the cylinders by a turbocharger is often reduced in

volume by a/an_____. 112. Where is fusible plug installed on a scotch or auxiliary boiler? 113. The constant capacity, pressure atomizing, fuel oil burners designed to

meet a wide variation in the steaming loads of an auxiliary boiler are_____.

114. Which type of pump is typically used to supply fuel to a unit type auxiliary

boiler?


115. An auxiliary boiler equipped with a return flow fuel atomization system, has a_____.

116. An auxiliary boiler is equipped with a return flow fuel atomization system,

which uses _____. 117. The burner assembly on an automatically fired auxiliary boiler fitted with

variable capacity, pressure atomizing burners, maintains steam pressure by_____.

118. What is the function of the after-coolers installed in the diesel engine air

intake system? 119. The concentration of total dissolved solids in the water of an auxiliary

boiler can increase as a result of_____. 120. The variations in the amount of fuel oil burned in the operation of an

auxiliary boiler, utilizing a return flow type atomization system, is a function of the_____.

121. The tube sheets in a fire –tube auxiliary boiler are normally connected

by_____. 122. Which of the diesel engine components listed increase air density and

helps to improve engine operating efficiency? 123. The rate of heat transfer in a water-tube auxiliary boiler can be increased

by_____. 124. Which of the following statements about a coil-type forced circulation

auxiliary water-tube boiler is correct? 125. In a coil-type forced circulation auxiliary water-tube boiler,_____. 126. In an auxiliary boiler steam and water system, the highest pressure is in

the_____. 127. The concentration of dissolved solids in the boiler water of an auxiliary

boiler could increase as a result of_____. 128. How is down-comers installed on auxiliary package boilers protected

from direct contact with host gases?


129. Which of the engine components listed increases air charge density and helps to improve engine operating efficiency?

130. How is the concentration of dissolved oxygen in the feed-water of an

auxiliary boiler maintained at acceptable limits? 131. A seven-cylinder, 2-stroke/cycle, single acting diesel engine has a 750

mm bore and a 2000 mm stroke. What indicated power will be developed if the average mean effective pressure is 14.8 kg/cm2 at a speed of 96 RPM?

132. A diesel engine indicator diagram measures 12.5 cm in length and has

an area of 22 cm2. What is the cylinder mean effective pressure if the spring used has a scale of 1.25 mm equals 1 kg/cm2?

133. A diesel engine indicator diagram has an area of 22 cm2 and a length of

12.5 cm. If the scale of the indicator spring is 1 mm = 1 kg/cm2, what is the cylinder mean effective pressure?

134. Economy and efficiency in the operating of a marine boiler have

traditionally been characterized by _____. 135. A knocking sound from one cylinder of an operating air compressor

indicates 136. Which of the listed fuel oil ignition methods are commonly found on

automatically fired auxiliary boilers aboard merchant vessels? 137. The exposed portion of the outboard propeller shaft is protected against

seawater corrosion by___________ .

138. A refrigeration system compressor crankcase is sweating or unusually cold. This is an indication of

139. In a low pressure air compressor, the loss of volumetric efficiency

normally results from__________. 140. How will you operate a centrifugal fire pump at reduced capacity? 141. Blisters developing on boiler tubes can be caused by _________. 142. How is the speed of a radial piston hydraulic motor controlled?


143. Which condition indicates the air side fouling of an after-cooler on turbocharged diesel engine?

144. Why are some main diesel engines vibrating at a certain RPM? 145. To obtain the best mixing of air and fuel with a fuel oil atomizer, you

need to adjust the ________. 146. Which of the following factors tends to increase scale formation on the

saltwater side of a heat exchanger used in a diesel engine cooling water system?

147. Where is the charging valve of a refrigeration system located? 148. The most important parameter for a marine diesel engine is the rating

figure usually stated as ________. 149. Compressed air to operate air powered tools is supplied by __________. 150. In most installations, the firing rate of a boiler using steam atomization is

indicated by the ________. 151. What may cause white smoke exhausting from an operating diesel

engine? 152. How do we maintain constant steam pressure? 153. What is the purpose of an exhaust gas bypass installed on a waste heat

boiler? 154. Which of the following procedures should be carried out to permit the

continued operation of a crosshead engine with a leaky after-cooler? 155. In a boiler furnace, incomplete combustion due to insufficient air yields

an excess amount of _______. 156. If the discharge valve is closed before the drive motor is stopped, which

of the following types of pumps will most likely be damaged? 157. How is the designed capacity of a centrifugal pump being maintained? 158. What does the indicator card or pressure-volume diagram show?


159. The purpose of separating nozzle in the accumulator of a water-tube, coil type, steam generator is to separate_____.

160. What condition of an inlet manifold pressure does a turbocharged diesel

engine have in relation to the load? 161. Corrosion and grooving on the blading of an exhaust driven turbocharger

is caused by certain components of residual fuel oils. These components are vanadium, sodium, and _____.

162. If crank web deflection readings are positive, what does this indicate? 163. If fuel injection to a four-stroke/cycle diesel engine begins earlier than

designed, why is ignition maybe delayed? 164. When a diesel engine compression pressure is checked, where is the

indicator connected? 165. If the speed of a turbocharged diesel engine is maintained constant, the

turbocharger speed will _______. 166. Waterside grooving is usually very difficult to locate in a boiler tube

before leakage occurs because _______. 167. Which of the following describes a characteristic of scale forming

impurities in boiler water? 168. Which of the following is used for bilge systems, evaporators and gas

freeing systems on tanks? 169. What is a low cylinder compression pressure and a high exhaust

temperature indicate from among the choices? 170. On a turbocharged, medium –speed, diesel engine, which of the

following problems is an indication of a restricted air intake passage? 171. The speed of the turbocharger for a four-stroke/cycle diesel engine

driving a generator at constant speed depends on the _______. 172. What statement is correct pertaining to Oily Water Separator, OWS? 173. A diesel engine is warmed up and white vapor is noted in the exhaust,

what does this indicate?


174. What can cause a combustion knock occurring in a diesel engine? 175. What indicates a sudden increase in lube oil pressure to the main

turbine? 176. All of the diesel cylinders firing pressures are normal, yet all of the

exhaust temperatures are low. Which of the following situations is responsible for this condition?

177. The pressure in an operating diesel engine cylinder continues to rise for

a short period after the piston passes top dead center as a result of the __________.

178. Which of the following conditions is responsible for the fuel oil to atomize

when using a steam atomizer in an auxiliary boiler? 179. What is a practical way of checking for excessive fuel injection in one

cylinder of an operating diesel engine? 180. Which of the listed conditions would indicate a dirty atomizer sprayer

plate? 181. Excess air must be provoked to an operating boiler to allow for _______. 182. The potable water piping systems in ships must be ____________. 183. What component of a diesel engine converts the linear motion of a

piston into the rotary motion required to drive gears, propeller shafts, and generators?

184. If a boiler is smoking a black and increasing the boiler front air box

pressure does not reduce the smoke, the cause can be ______. 185. A good quality oil used in main propulsion engine lubrication systems

should be________ . 186. What can cause black smoke exhausting from an operating diesel

engine? 187. If fuel injection occurs too early, a diesel engine will lose power for what

reason?


188. The development of pinhole leaks where the boiler tubes enter the water

drums and headers may be evidence of _______. 189. What do pyrometers commonly found on diesel engine exhaust systems

consist of? 190. Ejectors are simple, reliable, inexpensive, effective and

______________. 191. The conical steel or composition cone installed on a propeller, known as

a fairwater cone, provides which of the following benefits? 192. What can cause white smoke exhausting from a diesel engine? 193. What is the sign of an early injection timing in a diesel engine? 194. Regarding main propulsion boilers, what condition would normally be

indicated if the bridge reported that white smoke was observed coming from the stack?

195. Which of the following statements is true concerning the overall

efficiency of air compressors? 196. A salinity indicating system functions on the basic principle of measuring

the __________. 197. Poor atomization accompanied by an elongated flame from a stem

atomization burner is most likely caused by _______. 198. Which of the following will have the greatest effect on the mean effective

pressure in a cylinder of a diesel engine operating at normal load? 199. An important point of consideration when replacing a dry type intake

filter on an air compressor is to______ 200. If the turbocharger of a four-stroke /cycle diesel engine fails to operate

properly, which of the following statements best describes the probable effect?

201. What will result in the longer ignition delay period resulting from the use

of low cetane fuel?


202. When the relief valve opens it discharges high pressure refrigerant vapor to the____________.

203. Which of the following could result if there is late fuel injection in a diesel

engine? 204. In a diesel engine, late fuel injection is indicated by black or gray

exhaust smoke with ___________. 205. Late fuel injection in a diesel engine is indicated by low firing pressure.

What might be the other indication? 206. Late fuel injection in a diesel engine is indicated by low firing pressure.

What is the other indication? 207. White stack smoke from a main propulsion boiler could indicate

_______. 208. What will be the result of prolonged operation of a diesel engine closed

cooling sysetm with temperature lower than that of designated temperature?

209. On a steering gear system, what does the telemotor receiver unit

control? 210. On a steering gear system, what does the telemotor receiver unit

control? 211. What is the main operating characteristic of diesel engines that

distinguishes them from other internal combustion engines? 212. What is the purpose of the flywheel? 213. An operating turbocharged diesel engine that suddenly loses power, is

due to a/an _______. 214. What might cause the sweating of the crankcase of a refrigeration

compressor? 215. Diesel engine mufflers or silencers reduce the engine exhaust noise by

_______.


216. What could influence the ratio of pressure rise during the period following initial fuel ignition in a diesel engine?

217. How is dissolved oxygen in boiler feed water minimized? 218. What maintains the crankshaft axial alignment on a large diesel engine

installation? 219. When associated with main propulsion diesel engines, shaker,

circulation, and spray are the three general methods used in __________.

220. A pneumatic pressure tank is installed in a sanitary system to

_____________. 221. What is the secondary function of a waste heat boiler? 222. What is the primary function of a waste heat boiler? 223. Which of the precautions listed should be taken prior to blowing down a

boiler water wall header? 224. In a pneumatic automation system, a unit producing a signal to govern

the position of the controller of the measured variable, relative to the value of the measured variable, is said to have ________.

225. The most rapid period of fuel combustion and cylinder pressure increase

in a diesel engine should begin just before the piston reaches top dead center and completed when?

226. What is the condition of a crankshaft whose center of gravity coincides

with its center line? 227. A diesel engine cooling water system with has pH of 3.0? What does this

indicate? 228. How can you reduce the formation of carbon monoxide in diesel exhaust

gases? 229. Which of the listed components is used to protect the boiler super-heater

against the radiant heat of the furnace?


230. For equal amounts of fuel injected, what change in condition will have the greatest effect on the mean effective pressure in the cylinder of a diesel engine?

231. Why are large steam drums not required in the design of a coil-type

auxiliary water-tube boiler? 232. Which of the following statement is true concerning the main diesel

engine oil cooler? 233. What will happen to R-12 refrigerant system when there is an increased

in heat load? 234. Under normal operating conditions of constant load and combustion

rates, which of the following will occur when the amount of excess air to the furnace is increased?

235. Why are removable sleeves installed on centrifugal pump shafts? 236. How do lubricating oil and grease gets into the boiler water system? 237. Why should an exhaust gas bypass installed on a waste heat boiler? 238. Why should the main steam stop valve of an auxiliary boiler be eased off

its seat and then gently closed before lighting off? 239. Why is it desirable for an auxiliary boiler safety valve to pop open and

reseat firmly? 240. What is the purpose why, when conducting a hydrostatic test on a water-

tube auxiliary boiler the test water should be heated to a temperature of at least 70oF (21oC)?

241. What is the use of engine indicator on a diesel engine? 242. What is the purpose of sacrificial zinc anodes used on the salt water side

of diesel engine heat exchangers? 243. What is the function of a hydraulic telemotor transmitter used in an

electro-hydraulic steering gear system? 244. What is the importance of an oil mist detector in a main propulsion diesel

engine?


245. What influenced the rate of pressure rise in a diesel engine cylinder

following fuel injection and ignition? 246. The greatest deterrent to heat transfer from the fireside to the waterside

of a boiler is _________. 247. Which of the following statements concerning the operation of a coil type

forced circulation auxiliary water-tube boiler is correct? 248. The formation of a pit in a boiler tube is most likely to occur when

_________. 249. The most rapid period of fuel combustion occurring in a diesel cylinder

should begin just before the piston reaches top dead center and ___________.

guide questionnaires for seafarers · 2016-08-18 · 47. helical gears are preferred over spur...

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