elements in machine design (j.t.) module 17

7/28/2019 Elements in Machine Design (j.t.) Module 17

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ELEMENTS IN MACHINE DESIGN (J.T.) MODULE 17

1. Corrosion resistant in oxidizing environments.a. Stainless steelb. Aluminiumc. Carbond. Wood

2. Forces are the same planea. Non-coplanarb. Rigidc. Coplanar forcesd. Vector forces

3. This category includes all other combinations ofnonconcurrent, non parallel, and noncoplanar forces.

a. Two-dimensional systemb. General three-dimensional systemc. One dimensional systemd. Quadratic system

4. Used to shape and sharpen carbide cutting tools.a. Mechanical grindingb. Electrochemical grindingc. Laser grindingd. None of the above

5. The load at which a column fails is known asa. Critical load or Euler loadb. Secant loadc. Maximum loadd. Under load

6. In a statically indeterminate system, one or more of thesupports or members can be removed or reduced in

restraint without affecting the equilibrium position.

Those supports and members are known as

a. Redundant membersb. Fixed membersc. Determinate membersd. Modulus

7. Produced by reheating white cast iron to between 1500 Fand 1850 F (800 and 1000 C) for several days followed by

slow cooling.

a. Brittle steelsb. Mild steelc. Carbon steeld. Malleable cast iron

8. Cast iron that contains both cementite and graphite andis between white and gray cast irons in composition and

performance

a. Malleable cast ironb. Mottled cast ironc. Gray cast irond. White cast iron

9. Typical critical slenderness ratios range froma. 10 to 15b. 80 to 120c. 20 to 50d. 100 to 500

10. Maximum stress for which the linear relationship is valid

a. Elastic limitb. Yield pointc. Proportionality limitd. Design limit

11. The slope of the straight line connecting the origin andthe point of operation

a. Secant modulusb. Modulus of elasticityc. Drop modulusd. Youngs modulus

12. When the equations of equilibrium are independent, arigid body force system is said to be

a. Statically indeterminateb. Statically determinatec. Statically balanced. Statically imbalance

13. When the body has more supports than necessary foequilibrium, the force system is said to be

a. Statically indeterminateb. Statically determinatec. Statically balanced. Statically imbalance

14. General name given to a wide range of alloys containingiron, carbon, and silicon, and to a lesser extend,

manganese, phosphorous, and sulphur.

a. Cast ironb. Carbonc. Metald. Gold

15. Cutting fluids are used toa. Reduce loadsb. Reduce friction, remove heat, remove chips, and

protect against corrosion

c. Increase powerd. Increase load16. Used when it is impractical uneconomical to performdestructive sampling on manufactured products

a. Destructive testingb. Nondesctructive testingc. Destructive evaluationd. All of these

17. Measures the capacity of a surface to resist deformationa. Impact testsb. Hardness testsc. Tensile testsd. Compressive tests

18. The length of time it will cut satisfactorily beforerequiring grinding, and depends on the conditions of use.

a. Value of a toolb. Life of a toolc. Tool evaluationd. Economy of the material

19. Used as a finishing operation since very fine anddimensionally accurate surface finishes can be produced.

a. Surfacingb. Drilling


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c. Grindingd. Fining

20.____ is grinding in which very little material is removed.Its purpose is to produce very smooth surface.

a. Honingb. Grindingc. Snaggingd. Drilling

21. Describes very rough grindinga. Grindingb. Lappingc. Snaggingd. Cleaning

21. Used to produce dimensionally accurate surfaces byremoving less than 0.001 in (0.025 mm).

a. Lappingb. Snaggingc. Honingd. Modelling

22. For any specific material the percentage decrease indiameter is known as

a. Longitudinal strainb. Column strainc. Vertical straind. Lateral strain

23. A material that deforms and elongates a great dealbefore failure is said to be a

a. Brittle materialb. Ductile materialc. Plastic materiald. Elastic material

24. Total plastic strain at failure.a. Percent elongationb. Less elongationc. Short elongationd. Current elongation

25. Very short compression members are known asa. Spindleb. Pliersc. Piersd. Pipe

26. Long compression members are known asa. Spanb. Columnsc. Shaftd. Spring

27. All forces are parallel and applied along a straight linea. Vertical force systemb. Linear force systemc. Cycle systemd. Moment system

28. Forces act at the same pointa. Non-concurrent forcesb. Couplec. Coplanar forcesd. Concurrent forces

29. The energy per unit volume stored in a deformedmaterial

a. Stressb. Pressurec. Kineticd. Strain energy

30.___ is able to absorb and release strain energy withoupermanent deformation.

a. Resilient materialb. Elastic materialc. Deformed materiald. Plastic

31. The strain energy per unit volume required to reach theyield point.

a. Modulus of resilienceb. Modulus of stressc. Youngs elongationd. Degree of deformation

32. Determined by pressing a hardened steel ball into thesurface of a specimen.

a. Rockstar hardness testb. Brinell hardness testc. Brayton steel testd. Kelvin test

33. The number of redundant members is known as thea. Degree of saturationb. Degree of indeterminacyc. Creepd. Poissons ratio

34. The theoretical maximum load that an initially straightcolumn can support without buckling.

a. Absolute loadb. Euler loadc. Bessemer forced. Ultimate weight35. Most common type of cast irona. Black cast ironb. Gray cast ironc. Coald. Simplex steel

36. A measure of materials ability to yield and absorb highlylocalized and rapidly applied stresses

a. Creepb. Ductilityc. Toughnessd. Plasticity

37. The continuous yielding of a material under constanstress

a. Elasticityb. Creepc. Malleabilityd. Plasticity

38. Most frequency used materials in engineering designa. Stickb. Glassc. Ceramics


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d. Metals39. The most prevalent engineering metal because of the

abundance of iron ore, simplicity of production, low cost,

predictable performance.

a. Steelb. Carbonc. Brassd. Copper

40. The ratio of the lateral strain to the axial strain is knownasa. Pressure ratiob. Carbon ratioc. Poissons ratiod. Temper ratio

41. For most metals, Poissons ratio is taken asapproximately

a. 10b. 5c. 1d. 0.3

42. The earth and stone mixed with the iron oxides.a. Coalb. Cokec. Gangued. Sand

43. The process used to reduce iron oxides to pure iron takesplace in a

a. Cupolab. Blast furnacec. Izodd. Dryer

44. The furnace is charged with alternate layers of iron ore,coke, and limestone in the approximate ratio of

a. 4:2:1b. 10:5:1c. 20:20:10d. None of the above

45. Coal that has been previously burned in oxygen-poorenvironment

a. Waste productb. Bagassec. Coked. Wood

46. Used to reduce the carbon content and purify the iron.a. Bessemer and oxygen processesb. Bessemer and hydrogen processesc. Iron and oxygen processesd. Steel and iron processes

47. Bessemer steel that is subsequently refined in an openhearth process to remove sulphur, phosphorus, and iron

oxide is known as

a. Carbon steelb. Duplexed steelc. Copper and brassd. Aluminium

48. The simplest and most common grades of steel belong tothe group of

a. Manganese steelsb. Alloy steelsc. Carbon steelsd. High strength steels

49. Steels that are used for wire, structural shapes, andscrew machine parts

a. High carbon steelsb. Medium carbon steelsc. Low carbon steelsd. Low alloy steels

50. Steels used for axles, gears, and similar parts requiringmedium to high hardness and high strength.

a. High carbon steelsb. Medium carbon steelsc. Low carbon steelsd. Low alloy steels

51. Steels used for drills, cutting tools, and knives.a. High carbon steelsb. Medium carbon steelsc. Low carbon steelsd. Low alloy steels

52. Steels containing less than 8% total alloying ingredientsa. High carbon steelsb. Medium carbon steelsc. Low carbon steelsd. Low alloy steels

53. Steels contain more than 8% total alloying ingredients.a. High alloy steelsb. Medium carbon steelsc. Low carbon steelsd. Low alloy steels

54. Very low carbon steels and used for rocket motor casesaircraft and missile turbine housings and other highstrength applications.

a. High carbon steelsb. Medium carbon steelsc. Low carbon steelsd. Maraging steels

55. Used to increase atmospheric corrosion resistance.a. Copperb. Boronc. Carbond. Aluminium

56. Used to increase hardness, strength and corrosionresistance

a. Aluminiumb. Chromiumc. Alloyd. Silicon

57. Most modern grinding wheels are produced froma. Aluminium oxideb. Tungstenc. Nickeld. Carbon monoxide


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58. A method of grinding that does not require clamping,chucking, or holding round work pieces.

a. Centerless grindingb. Manual grindingc. Automatic grindingd. Bottomless grinding

59. Uses high-energy electrical discharges to shape anelectrically conducting workpiece.

a. Automotive machiningb. Electrical conducting machiningc. Laser beam machiningd. Electromechanical machining

60. Removes metal by electrolysis in a high-current deplatingoperation.

a. Electrochemical machiningb. Automotive machiningc. Electrical conducting machiningd. Laser beam machining

61. Volume of metal removed per unit energy useda. Material efficiencyb. Precision abilityc. Current efficiencyd. Material ratio

62. Used to increase hardness and strength.a. Alloyb. Boronc. Carbond. Lead

63. The energy expended per unit volume removed, knownas the

a. Cutting powerb. Total energyc. Cutting forced. Specific cutting energy

64. The angle at which the tool meets the workpiece ischaracterized bya. End angleb. Top anglec. True rake angled. Base angle

65. Used to increase toughness and corrosion resistancea. Manganeseb. Nickelc. Tungstend. Graphite

66. Used to reduce brittlenessa. Cobaltb. Alloyc. Manganesed. Copper

67. Unique form of cast iron with worm-shaped graphiteparticles.

a. Compacted graphitic particlesb. Wrought ironc. Ored. Magnesium

68. Low-carbon iron (less than 0.1%) with small amounts ofslag and gangue in the form of fibrous inclusions.

a. Wrought ironb. Gray cast ironc. Black goldd. Zinc

69. Produced from bauxite orea. Aluminiumb. Zincc. Carbond. Steel

70. A mixture of hydroxides of aluminium and oxides of ironsilicon, and titanium.

a. Coalb. Bauxite orec. Tungstend. Carbon steel

71. The primary disadvantages of aluminium are itsa. Cost and low strengthb. Cost and high strengthc. Abilityd. Machinability

72. Improves the age hardenability of aluminium.a. Carbonb. Copperc. Chromiumd. Cobalt

73. Aluminum is hardened bya. Precipitation hardening processb. Distillation hardening processc. Annealingd. None of the above

74. Commonly used to weld aluminiuma. Tungsten-inert-gas (TIG) and metal-inert-gas (MIG)b. Electric weldingc. LPG weldingd. Electrochemical welding

75. A force on a rigid body caused by other bodies.a. Internal forceb. External forcec. Rigid forced. Vector force

76. Force that holds parts of the rigid body together.a. Internal forceb. External forcec. Rigid forced. Vector force

77. A vector of unit length directed along a coordinate axis.a. Unit vectorb. Force vectorc. Perpendicular vectord. Axial vector

78. Highly soluble in aluminium and is used to increasestrength by improving age hardenability.

a. Magnesiumb. Zinc


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c. Tind. Polymer

79. The most common alloying ingredients in coppera. Carbonb. Zincc. Brassd. Steel

80. A loss of zinc in the presence of certain corrosive mediaor at high temperatures.

a. Dezincificationb. Corrosionc. Gasificationd. Alloying

81. A major component in most bronzes.a. Tinb. Polymerc. Graphited. Steel

82. An alloy of copper and zinc.a. Bronzeb. Brassc. Aluminiumd. Cobalt

83. An alloy copper and tin.a. Bronzeb. Brassc. Tungstend. Fiber

84. Alloys based on titanium, tantalum, zirconium, andtungsten

a. Refractory and reactive metalsb. Abrasive materialsc. Polymersd. Raw materials

85. A large molecule in the form of a long chain of repeatingunits.a. Fiberb. Polymerc. Carbidesd. Metals

86. Cross-linking of natural rubber is known asa. Vulcanizationb. Polymerizationc. Fabricationd. Stabilizer

87. The average number of mers in the moleculea. Degree of polymerizationb. Degree of accuracyc. Mers factord. Mole factor

88. A hard material that can cut other materials.a. Carbidesb. Abrasivec. Cutterd. Chain

89. Have extreme hardness, wear resistance, and thermastability

a. Abrasiveb. Carbidesc. Alloyd. Tool steel

90. The equations of statics are not sufficient to determineall reactions, moments, and internal forces.

a. Statically determinateb. Statically indeterminatec. Statically balanced. Equal reactions

91. Equal to the number of reactions or members that wouldhave to be employed in order to make the structure

statically determinate.

a. Degree of indeterminacyb. Degree of determinacyc. Statically determinated. Statically indeterminate

92. Three common configurations of beams that arerecognized as statically indeterminate are continuous

beam, propped cantilever beam and

a. Fixed end beamb. Simple beamc. Cantilever beamd. Hanging beam

93. Has two or more spans and is statically indeterminate.a. Cantilever beamb. Continuous beamc. Fixed beamd. Propped beam

94. A statement of how the total moment is derived from anumber of forces acting simultaneously at a point.

a. Varignons theoremb. Three moment equationc. Loop theoremd. None of the above

95. Study of rigid bodies that are stationary.a. Staticsb. Dynamicsc. Kinematicsd. Kinetics

96. A push or pull that one body exerts on another.a. Forceb. Weightc. Torqued. Work

97. A vector having magnitude, direction, and location inthree-dimensional space.

a. Momentb. Concentrated forcec. System forced. Simple force

98. The name given to the tendency of a force to rotateturn, or twist a rigid body about an actual or assumed

pivot point.


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a. Reactionsb. Supportc. Vectord. Moment

99. The process where a physical mixture of carbide andpowdered metal is heated in order to solidify the powder

into a single piece.

a. Sinteringb. Rovingc. Shearingd. Solidifying

100.Used where high stiffness and low coefficients of thermalexpansion are needed.

a. Graphite fibersb. Carbon fibersc. Steel fibersd. Plastic fibers

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elements in machine design (j.t.) module 17

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