Function 1 Junior (reviewer)

Slide 1: 

1. When does the entrance of water into the main propulsion lobe oil system becomes undesirable? a. When the flash point of the lube oil is raised to a dangerously high level b. When water causes oil to clog in journal bearings c. When emulsification occurs with the results loss of lubricating qualification d. When all oil additives break down into acids when in contact with water

Slide 2: 

2. What is the effect of putting grease that is too soft into a roller bearings? a. excessive channeling of the grease b. emulsification of the thicker additiv c. high heat through churning d. gelling of the base oil

Slide 3: 

3. What involves shaping the material when it is not but not molten? a. Forging b. Extending c. casting d. sintering

Slide 4: 

4. What involves the shaping of metals, usually into rod or tube cross section, by forcing a. block of material through appropriately shape disc? a. Sintering b. Forging c. extruding d. casting

Slide 5: 

5. What is the production of shape parts from metal power? a. Forging b. Extending c. casting d. sintering

Slide 6: 

6. Heat involved during a change in temperature is known as. a. Sensible b. Latent c. total d. residual

Slide 7: 

7. Which kind of soap grease offers the maximum chemical stability and resistance to separation of temperature between 250 ˚F and 300 ˚F? a. Line soap grease b. Calcium soap grease c. sodium soap grease d. lithium soap grease

Slide 8: 

8. In what size is iron pipe not found? , a. 3/8 inch b. 1/2 inch c. 5/8 inch d. ¾ inch

Slide 9: 

9. A grease lubricating ball or roller bearings will run cooler if the grease a. fills 10% of all void space w/in the bearing b. has a low grease penetration number c. is thinned prior to packing the bearings

Slide 10: 

10. Which size of pipe has the greatest heats of all substance is known as. a. 3/4 inch pipe standard b. 3/4inch pipe extra strong c. 3/4inch pipe double extra strong d. none all have the same outside diameter

Slide 11: 

11. Oil-film pressure produced by a rotating journal is: a. the same as the pressure in the lubricating system b. less than the pressure in the lubricating system c. greater than the pressure in the lubricating system d. higher at the oil groove location.

Slide 12: 

12. Steel pipes over 12 inches in diameter is ,sized by the. a. inside diameter b. wall thickness c. outside diameter d. threaded diameter

Slide 13: 

13. Standard, extra strong, and double extra strong steel pipe all have the same: a. inside diameter b. out side diameter c. wall thickness d. wall strength

Slide 14: 

14. The difference between the pressure at the point being measured and that of a perfect vacuum is the pressure. a. Internal b. absolute c. Gauge d. external

Slide 15: 

15. What is meant by the tern " base" when referring to greats? a. texture of the grease under load b. temperature at w/c the grease soften or metals c. type of soap used in its manufacture d. temperature below w/c the grease will be ineffective as a lubricant

Slide 16: 

16. Which statement best describes an oil lubricated stern tube bearing installation? a. It receives its oil supply from a branch line of the main tube system b. No shaft liner is needed in way of the bearing c. The system pressure must be lowered then maneuvering in port to prevent blowing the outer oil seal d. For proper regulation or bearing temperature the system must have its own oil cooler

Slide 17: 

17. As tube oil absorbs moisture, the oil's dielectric strength can be expected to: a. remain the same b. increase with an increase in viscosity c. decrease d. increase with an decrease in viscosity

Slide 18: 

18. Dirt should not be allowed to contaminate a grease lubricant because the a. dirt will cause corrosion of bearing b. bearings will leak oil excessively c. dirt is very abrasive when mixed with grease d. grease will become inflammable

Slide 19: 

19. Gasket made of copper sheet is usually annealed by heating it to a cherry red color and then: a. cooling it slowly in air b. dosing it in cold water c. quenching it slowly in oil d. drawing its temper quickly

Slide 20: 

20. Which of the propeller stated below will not require stress relief treatment after minor repairs, strengthening of tire tips or thinning of the blade edges. a. Manganese, nickel, aluminum, bronze b. Nickel, aluminum, bronze c. Manganese, bronze d. nickel, manganese, bronze

Slide 21: 

21. Which frictional component is lubricated by a hydrodynamic film of lubricant? a.Crossheads b. guide bearings c. Guides d. Kingsbury thrust bearings

Slide 22: 

22. A vessel's tail shaft must be drawn periodically for examination. A tail shaft with most special keyway and corrosion resistant liner must be drawn and examined once every years. a. Two b. Three c. four d. eight

Slide 23: 

23. A vessel's tail shaft must be drawn periodically for examination for vessels which have seawater lubricated tail shaft. The tail shaft drawing interval may be extended by the officer-in charge marine inspection. a. to the next regular dry docking period but not more than six months b. to the next regular dry-docking period but not more than twelve months c. for a time equal to lay up time but not more than a year d. for a time equal to lay up time but not more than four months

Slide 24: 

24. When you are drilling aluminum, the proper lubricant to use is. a. mineral oil b. kerosene c. sulfurized oil d. soda water

Slide 25: 

25. What is the ability of a material to undergo permanent change in shape without rupture or lose of strength. a. tensile strength b. ductility c. brittleness d. malleability

Slide 26: 

26. A material that is liable to fracture rather than deform when absorbing energy (such as impact) is termed as. a. Toughness b. hardness c. Brittleness d. malleability

Slide 27: 

27. Which of the following statement is true concerning a hydrodynamic fluid wedge in lubrication? a. the wedge-shaped oil film's load carrying capacity is determined by its length and thickness b. the load-carrying capacity is inversely proportional to the velocity of the fluid c. the load-carrying is capacity is inversely proportional to the viscosity of the fluid d. the load-carrying capacity is directed proportional to the thickness of the oil film

Slide 28: 

28. When drilling, which material does not have to be lubricated? a. tool steel b. mild steel c. cast iron d. cast steel

Slide 29: 

29. Which metal can usually be drilled with lubrication? a. Steel b. Brass c. monel d. tungsten

Slide 30: 

30. The rate of heat transfer from a hot region to a cold region is affected mostly by the. a. size of the heat sink between the regions b. size of the heat source c. temperature difference between the regions d. total heat of the system

Slide 31: 

31. Solder is an alloy of a. tin and lead b. beryllium and antimony c. copper and lead d. nickel-base

Slide 32: 

32. Coating the tip of the soldering iron with solder is called tinning. What is the effect of this process? a.prevents the tip from over heating b. protect the tip from scratches c. adds extra weight to the tip d. prevents tip oxidation when heated

Slide 33: 

33. When steel, cast iron, or other metal having scale of the surface of being turned, the first roughing cut should be taken: a. slowly to prevent tool hatter b. deep enough to get under the scale c. lightly to avoid dulling the tool d. rapidly in a continuous ship

Slide 34: 

34. If all the metals fisted below are two inches in diameter, which is cut w/ the highest speed on the lathe? a. cast iron b. aluminum c. machine steel d. soft brass

Slide 35: 

35. If report of the chemical analysis of an oil sample taken from the main propulsion machinery indicates an increase neutralization number, you should be aware that a. acidity has increased b. viscosity has increased c. demulsibility has improved d. foaming is center to occur

Slide 36: 

36. A good lubricating oil for used in any machinery should have the characteristics of being? a. acid free b. rapid oxidizer c. capable of emulsifying d. additive free

Slide 37: 

37. What light, strong and corrosion-resistant, kind of metal is used as the plate material in plate­tube heat exchange. a. Aluminum b. bronze c. Tin d. titanium

Slide 38: 

38. What ductile and malleable kind of metal is resistant to corrosion by air or water. a. Aluminum b. bronze c. Tin d. titanium

Slide 39: 

39. Which lube oil additives keep fine residue particles suspended in the oil? a. floc point additives b. suppressant additives c. dispersant additives d. all of the above

Slide 40: 

40. A kind of organic solid lubricant such as graphics would be suitable as an. oil additives for use with: a. Machinery bearings subjected to high temperatures b. Antifriction bearings on general service pumps c. Bearing subject to flueting loads…. d. line shaft bearings

Slide 41: 

41. These are in the bearing lubricant of an organic solid lubricant act as a a. Low temperature sealer b. Moisture barrier c. filter to smooth surface irregularities d. coolant to carry away heat

Slide 42: 

42. Which statement is true about an oil with a ping viscosity index? a. a large change of viscosity occurs with change of temperature b. no change in viscosity occurs with change in temperature c. very little change in viscosity occurs with a change in temperature d. the viscosity of the oil increase in the temperature

Slide 43: 

43. The volatility of an oil may be indicated by. a. the flash point b. the fire point c. the autogenous ignition point d. any of the above

Slide 44: 

44. The term "pour point" is defined as the lowest temperature at w/c lubricating oils will flow., a. rapidly b. by gravity d. at the rate of 60 per second

Slide 45: 

45. What is the process of removing moisture from air? a. Humidification b. dehumidification c. vaporization d. evaporation

Slide 46: 

46. The by-products of oxidation resulting from water contamination of hydraulic oil are. a. removed by cellulose type filters b. gum, varnishes, and acids c. always neutralized by oil additives d. harmless and have no effect on system components

Slide 47: 

47. The impurities commonly found in marine lubricating oil w/c cannot be removed by a centrifugal purifier at normal operating temperature? a. Water b. soluble sludge c. carbon d. metal particles

Slide 48: 

48. How is tubing measured and sized ? a. cross-sectional area b. inside diameter c. outside diameter d. nominal wall thickness

Slide 49: 

49. As the speed of oil is lubricated will the ball bearing increases, fluid friction due to churning causes heat and should be avoided by? a. adding are lubricant until the ball bearings are completely covered with a layer oil b. reducing the quantity of lubricating until only a mist of oil is present on the ball bearings c. maintaining a continuous fluid of oil on the bearing d. installing oil ring on the ball

Slide 50: 

50. With oil bath lubricating of ball bearings in a cargo pump, the oil level should: a. never be higher than the center of the lowest ball in the bearing housing b. cover the bottom of the pump shaft c. cover the top ball in the pump shaft d. be kept at-the top of the oil reservoir

Slide 51: 

51. The viscosity of an oil is a measure of its a. Weight b. demulsibility c. internal friction d. S.E. number

Slide 52: 

52. Friction engine wear, and oil consumption in a diesel engines are directly related to the . of the oil. a. Acidity b. flash point b. pour point d. viscosity

Slide 53: 

53. Which characteristics of lube oil are most important to the engineer from an operational stand point? a. ash content, carbon residue, gravity b. viscosity, acidity, demulsability c. pour point, flash point precipitation number d. auto-ignition point,, viscosity index, film strength

Slide 54: 

54. A lubricating oil becomes thin at high temperature and thick at low temperature will have a: a. low viscosity index b. high viscosity index c. high neutralization number d. low demulsability quality

Slide 55: 

55. What is the relationship between viscosity and specific gravity? a. liquids w/ difference viscosities will always have the same specific gravity b. liquid with different viscosities will never have the same specific gravity c. viscosity and specific gravity are directly proportional d. viscosity and specific gravity are directly proportional d. viscosity and specific gravity are not related in that one does not define or limit the other

Slide 56: 

56. What is the best gasket materials used in cargo fuel lines? a. sheet asbestos b. oil-resistant sheet packing c. cock sheet packing d. unvulcanized rubber packing

Slide 57: 

57. The ability of lubricating oils to resist viscosity changed during temperature changes is indicated by the oils a. American petroleum institute number b. viscosity index number c. seconds saybolt furol number d. seconds saybolt universal number

Slide 58: 

58. The term "separation" as used in oil purification refers to the separation of a. two liquids from each other b. fuel oil from lube oil c. acid contaminants from oil d. oil from its additives

Slide 59: 

59. The degree to which have viscosity of an oil will change in temperature is indicated by the of the oil. a. weight designation b. viscosity index c. floc point d. pour point

Slide 60: 

60. The source of metal particles adhering to the magnets in a lube oil trainer is probably the a. shaft journal b. reduction gear c. bearing shell d. babbit material

Slide 61: 

61. In a gravity type lube oil service system, no oil appearing in the sight flow glass ( bull's eye) while under way positively indicates. a. no oil is flowing to the bearings b. no oil is overflowing the gravity tank c. failure of all lube oil pumps d. the gravity tank are empty

Slide 62: 

62. If a laboratory chemicals analysis shows that the neutralization number of the lube oil used in a certain machinery unit has increased above the maximum number allowed you should. a. centrifuge the oil b. add make-up c. renew the entire oil d. operate the machinery at a reduced speed

Slide 63: 

63. To determine the approximate extent of the contamination of a lube oil system with solid foreign matter, the officer on duty should. a. watch for variation in the tube dil pump discharge pressure b. observe the oil flow in the sight glasses c. inspect the purifier for the accumulation of sediment d. maintain a close watch on the bearing temperature

Slide 64: 

64. The ability of oil to separate from any water present in referred to as its. a. precipitation number b. neutralization number c. pour point d. Demulsibility

Slide 65: 

65. The emulsification of water in engine lubricating oil will tend to. a. decrease sludge formation in lubrication oil b. improve the lubricating oil viscosity c. cause water separate from oil d. displace lubricating oil in friction areas

Slide 66: 

66. What is the test which measure the energy absorbed by a material when it is fractured. a. tensil test b. impact test c. hardness test d. bend test

Slide 67: 

67. What is the a test which measure a materials resistance to indention. a. tensile test b. impact test c. hardness test d. bend test

Slide 68: 

68. One characteristic of a lubricating oil, w/c could adversely affect the results of centrifuging: a. high the valve b. low oil floc point c. low oil demulsibility d. low oil neutralization number

Slide 69: 

69. Why should anti-friction bearing not excessively lubricated? a. the bearing will require immediate flushin b. excess lubrication will result in slippage c. dirt will accumulate inside the bearing d. the bearing will over heat

Slide 70: 

70. One of the characteristics of lubricating oil pump tanks includes: a. Installation of baffles to prevent excessive sloshing of oil b. Sufficient capacity to contain all the tube oil in the system except for the contains of the gravity tank c. Cooling coils made of welded seamless steel pipe d. The bottom of the pump should be integrated with the shell plating

Slide 71: 

71. If contaminated the tube oil was allowed to settle understurbed in a tank in hat manner will contaminant separate? a. sediment on the bottom oil in the middle, and water on top . b. sediment on the bottom water in the middle, oil on top c. water on the bottom sediment in the middle, and oil on top d. water on the bottom oil in the middle, and sediment on top

Slide 72: 

72. With reference to oxyacetylene welding, for welding high-carbon steels, for hand-facing, and for the welding of nonferrous alloys such as monel, the best flame to use is termed a/an. a. oxidizing flame b. neutral flame c. nitriding fusion d. carburizing flame

Slide 73: 

73. A measure of the material ability to withstand the loads upon it is service is called. a. tensile strength b. brittleness c. ductility d. malleability

Slide 74: 

74. What is the ability of a material that can be shaped by heating or rolling. a. ductility b. plasticity c. malleability d. elasticity

Slide 75: 

75. What is the ability of a material to deform permanently when load is applied? a. Ductility b. plasticity c. malleability d. elasticity

Slide 76: 

76. What is the ability of a material to return to its original shape or size after having been deformed or located. a. Ductility b. plasticity c. Malleability d. elasticity

Slide 77: 

77. What is a material that has a combination of strength and the ability to absorb energy or deform plasticity. a. Toughness b. malleable c. Hardness d. brittleness

Slide 78: 

78. What is the material's ability to result plastic deformation, usually by indication. a. Toughness b. dustiness c. Hardness d. brittleness

Slide 79: 

79. What is the test which measure a material's slow plastic deformation of a material under constant stress. a. tensil test b. hardness test c. impact test d. creep test

Slide 80: 

80. What is a test which determine the ductility of a material. a. tensil test b. gardness test c. impact test d. bend test

Slide 81: 

81. Reheating a hardened steel to some temperature lower than the hardening temperature and then cooled is termed. a. Normalizing b. hardening c. Annealing d. tempering

Slide 82: 

82. The purpose of annealing a steel is to make the metal. a. Tougher b. smoother c. Harder d. softer

Slide 83: 

83. When a steel is tempered it becomes. a. more brittle b. softer c. less brittle d. harder

Slide 84: 

84. What is the shaping process in the use of molten poured into a mould of the desired shape called? a. Forging b. casting c. Extending d. sintering

Slide 85: 

85. What alloy is used for propeller braze? a. manganese braze b. manganese, bronze c. copper and tin d. titanium and bronze

Slide 86: 

86. What metal is used as an alloying element in various special needs? a. Vanadium b. zinc c. Copper d. titanium

Slide 87: 

87. Zinc has a good resistance to atmosphere corrosion and when it is used as a coating for protection steel, the process is called. a. Ionizing b. disinfecting c. coating d. galvanizing

Slide 88: 

88. Brass is an alloy of. a. copper and tin b. copper and zinc c. copper and manganese d. copper and aluminum

Slide 89: 

89. Bronze is an alloy of. a. copper and zinc b. copper and tin c. copper and manganese d. copper and aluminum

Slide 90: 

90 What is the test which measure a material's strength and ductility. a. tensil test b. impact test c. hardness test d. bend test

Slide 91: 

91. The steel is heated to a temperature of 850-950'C depending on its carbon content, and is then allowed to cool in air. This treatment is termed. a. Normalising b. hardening c. Annealing d. tempering

Slide 92: 

92. What do you call the type of heat treatment when a steel is heated to 850-950 ˚C and is then rapidly cooled by quenching in oil water. a. Normalising b. hardening c. Annealing d. tempering

Slide 93: 

93. Which valves are usually opened for inspection when the ship is in dry dock? a. ballast pump manifold valves b. high and low suction valves on fuel and oil setting tanks c. bottom blow skin valves on main auxiliary boilers d. cooling water control valves on refrigeration condenser

Slide 94: 

94. Your ship has propelling machinery amidships, an after stern tube bearing of the sea water lubricated type, and a tail shaft 15 inches in diameter. The weardown of the stern has just been measures '/. inch. What should be done as a result of this reading. a. pull tailshaft and replace the bronze liner b. pull tailshaft and replace the lignum vitae c. pull tailshaft and buildup the bronze liner ' d. nothing as the reading is within the allowable limits

Slide 95: 

95. Coast Guard Regulations (46 CFR 61) require a tailshaft with a stress-relieved keyway and corrosion-resistant liner to be drawn and examined once every year? a. Two b. four c. three d. eight

Slide 96: 

96. Which nondestructive testing method can be used to most accurately detect, locate, identify, and measure defects in the welds and base metals regardless of material type and structure. a. Radiography b. visible dye penetrant, type B (red or white) c. Ultrasonic

Slide 97: 

97. A steel is heated to around 850-950'C but is cooled slowly, either in the furnace or an insulated space, this heat treatment is termed. a. Normalising b. hardening c. Annealing d. tempering

Slide 98: 

98. Demulsibility of lubricating oil is defined as: a. the ability of oil to separate from water b. the temperature at w/c oil flows rapidly c. a measure of the water in a lube oil system d. an emulsion of different grades of oil

Slide 99: 

99. An allowance mad be made for expansion and contraction in piping by the use of expansion joint of: a. Unions b. rectractable flanges c. union bulkhead fittings d. bends or loops in the line

Slide 100: 

100. Good quality tube oil for use in a propulsion engine should be. a. free from all chemical additives b. quickly chemically oxidized c. resistant emulsification d. readily saponified w/water