1. In a closed cooling system for a turbocharged four stroke diesel engine, fluctuating water pressure can be caused by? Eh

2. To properly use a tube expander, the expander should be placed in the tube to be rolled so that the

3. During the operation of a lube oil centrfuge, a thin emulsion interface occurs between the lube oil and seal. The position of this interface is determined by the

4. Which characteristic or condition will have the greatest effect on increasing a hydraulic oilas viscosity?

5. Fusible link fire dampers are operated by.

6. The measure gap between the face of the burner atomizer tip nut and the diffuser plate, is determined by the setting of the

7. Which of the following precautions should be observed concerning the introduction of a fire resistant fluid into a hydraulic system?

8. If the hydraulic governor has been drained and refilled with fresh oil, the engine should be operated until it reaches normal temperature, then the air should be purged by.

9. Which pressure in an operating hydraulic system is developed,

10. Low scavenging pressure delivered to the engine can cause ?

11. When the pressure on a compound gage is released, the gage pointer is returned to zero psig by action of the

12. Which of the following material has high tensile strength and corrosion resistance and has been used to replace steel metal in both flat plate form and in matched-metal die processes where parts are molded in the preformed shape?

13. For any piston ring to operate smoothly without scuffing, the ring must be ?

14. Diesel engine starting difficulties due to cold intake air temperatures, can be overcome by using alan?.

15. Acetylene should never be used at pressure in excess of 15 psig because the ?

16. The insertion of shims between the foot of a marine type connecting rod and a bearing box would result in.

17. Leakage of hydraulic fluid from around the shaft of a hydraulic motor may be caused by.

18. When conducting a routine hydrostatic test on a water-tube boiler, you should,

19. What do you call the portion of a hydraulic hose that determines its overall strength?

20. Why is a hydraulic linear actuator fitted with a cushioning device?

21. The ventilation system aboardships has fire dampers restrained by fusible links that will ?

22. Which of the following centrifugal pump components converts the liquid kinetic energy of velocity to the potential energy of pressure?

23. What is the used of jacking gear on main propulsion turbines?

24. What is the possible cause why a lube oil pump fails to build up discharge pressure?

25. What is caused by restriction occurring in the small orifices of pneumatic control system components?

26. Which of the following problems occurring in a hydraulic system can be caused by using an oil having a viscosity lower than specified?

27. A work piece has been mounted between centers and a test cut machined at each end to check alignment of the lathe centers. If the test cut on the tailstock end is deeper than the test cut on the headstock end, the tailstock must be moved?

28. Which of the following is the proper maintenance for a lube oil pump?

29. Which of the following is true concerning the hose threads on compressed gas oxy-acetylene regulators and torches ?

30. Modern trends show that the full flow filters used in multi-operation hydraulic systems would most likely be located ?

31. In order to install piping easier and to facilitate and disconnect the pump for servicing, which of the following fittings should be used?

32. Which of the factors listed governs the intensity of heat required for any given welding job?

33. Which internal combustion engine starting system uses a vane type fluid motor?

34. In certain cases, a cylinder liner can be refinished rather than replaced. When properly honed, the?

35. What will be the effect of obstructed suction passages in the casing or pintle of a radial piston hydraulic pump?

36. If the hydraulic governor has been drained and refilled with fresh oil, the engine should be operated until it reaches normal temperature, then the air should be purged by?

37. The purpose of the diffuser in a boiler burner assembly is to

38. What would you do after adding grease to a ball bearing with a hand held grease gun?

39. In the case of a variable speed centrifugal pump?

40. What can cause dirt in a fuel oil system to the diesel engine?

41. Why should a return lines in a non-pressurized hydraulic system reservoir enter the tank well below the fluid surface level?

42. How can the leak in a hydraulic system in a hatch cover be remedied?

43. Which ring dam arrangement should be used for centrifugal purification?

44. The large number of mechanical and pulsating vibrations developed in a diesel engine may damage an attached?

45. What is a one common cause of cylinder liner wear?

46. On a large low-speed main propulsion diesel engine, lower main bearing wear is usually measure by using alan

47. Abnormal crankpin bearing and piston skirt surface wear indicate a__?.

48. Which of the listed interlocks stops the valve in the remote operating valve line of air starting system from opening?

49. While your vessel is steaming with one boiler, the automatic combustion control system sensing line for the idle boiler is accidentally opened. How will this effect the steaming boiler?

50. The ignition quality of a fuel oil is an important operational consideration because it?

51. What will happen if a diesel engine is running in about to dry fuel oil day tank ?

52. With respect to diesel fuel, the ease with which a cold engine will start is dependent upon the?

53. Which of the following is the proper maintenance for a lube oil pump?

54. If the intercooler of a low-pressure air compressor becomes fouled either internally or externally, what will happen?

55. Thermocouple pyrometers are sued on large, main propulsion diesel engines to indicate the temperature of the ?

56. Which of the following operating conditions can occur when shims are removed from the joint between the foot of a marine type diesel engine connecting rod and the bearing box?

57. Increased internal leakage, in addition to poor hydraulic system response, and inadequate lubrication, is the result of ?

58. Thermocouple pyrometers are used on large, main propulsion diesel engines to indicate the temperature of the

59. Worn main bearings will cause the compression ratio of an auxiliary diesel engine to?

60. After how many hours would you consider changing the turbocharger bearings, even though all appears to be normal?

61. While your standing your engine room watch at sea, you notice the D.C. heater level dropping rapidly as indicated by the remote level indicator. Which of the following actions should be taken?

62. Too high exhaust gas temperature in all cylinders is cause by the following except?

63. Putting additives into diesel engine cooling water is primarily designed to prevent?

64. An advantage of aluminum pistons, when compared to cast iron piston is?

65. With an increase in temperature, the volume of hydraulic oil,

66. When the pressure on a compound gage is released, the gage pointer is returned to zero psig by action of the?.

67. What is the fusion of two metals joined together to produce a strong bind as one metal?

68. When arc welding, the flux that covers the electrode is used to

69. Which of the following statements concerning cylinder liner wear in a single acting diesel engine is correct?

70. What is caused by restrictions occurring in the small orifices of pneumatic control system components?

71. Some fluid filters used in hydraulic systems are designed to cope with increasing pressure differentials by ?

72. What dou call a component used to thoroughly separate small, fine, dust-like particulate contamination from hydraulic fluid?

73. Below are some of the causes of high exhaust gas temperature except?

74. The longer the ignition delay period resulting from improper use of low cetane fuel, the ?

75. A roller bearing should normally be filled to what fraction of its space cavity?

76. A properly honed diesel engine cylinder liner will ?

77. What size of the circular bar is required to make a hexagonal nut of 16mm sides?

78. When normal operating pressure is applied to the hydraulic oil in a high pressure system, the oil ?

79. Which of the listed devices is often clutched to the flywheel of small and medium size diesel engines for the purpose of starting?

80. The best way to recondition a defective fuel injector is to ?

81. Which of the following refers to the distance between the piston top at BDC and TDC?

82. The tool used to make up connection fittings for small diameter copper tubing is called alan_

83. What is the principal or main hazard to personnel when a diesel nozzle tester is in use?

84. The insulation and screen of diesel engine exhaust manifold shoul be put back after each overhaul because it?

85. What is the complete tool used for manually cutting threads on pipe ?

86. Which one of the following tool used in precision work to smooth or enlarge a slightly undersized hole?

87. What power is required in maintaining the hydraulic consumer system?

88. An acceptable method of temporary repairs in the vessels hulls is ?

89. What type of fits is necessary in the assembly of mating parts with the use of hydraulic press?

90. Hydraulic system reservoirs are often fitted with a combined filler/breather cap. What is the effect of a fouled breather element?

91. What care and attention should be maintained in a hydraulic system after installing a new hydraulic pump in it?

92. Where is the charge for an air starting system stored?

93. What type of hydraulic pumps most commonly used in steering systems ?

94. High jacket cooling water temperature for all cylinders is caused by ?

95. An O-ring seal in a hydraulic system will begin to leak when it has lost its interference fit due to ?

96. A leaking suction valve in the second stage of a two stage, high pressure, air compressor can cause excessively high ?

97. If during operation and the air compressor pressure will not raise, the probable cause maybe?

98. To determine the main bearing clearance of a propulsion diesel engine, you should measure the main bearing shell using a ball anvil outside micrometer and measure the crankshaft journal using alan

99. Automatic control valves for steam service require periodic maintenance inspections because they .

100. Where does the generator cooling water comes from during dyr-docking?