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1. C3 - 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?

 

2. C3 - A diesel engine indicator diagram measures 12.5 cm in length and has a 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?

 

3. C3 - 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?

 

4. C3 - Economy and efficiency in the operating of a marine boiler have traditionally been characterized by _____.

 

5. C3 - How will you operate a centrifugal fire pump at reduced capacity?

 

6. C3 - Blisters developing on boiler tubes can be caused by _________.

 

7. C3 - Why is some main diesel engines vibrating at a certain RPM?

 

8. C3 - To obtain the best mixing of air and fuel with a fuel oil atomizer, you need to adjust the ________.

 

9. C3 - 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?

 

10. C3 - Where is the charging valve of a refrigeration system located?

 

11. C3 - The most important parameter for a marine diesel engine is the rating figure usually stated as ________.

 

12. C3 - Compressed air to operate air powered tools is supplied by which of the following ?

 

13. C3 - In most installations, the firing rate of a boiler using steam atomization is indicated by the ________.

 

14. C3 - What may cause white smoke exhausting from an operating diesel engine?

 

15. C3 - What is the purpose of an exhaust gas bypass installed on a waste heat boiler?

 

16. C3 - In a boiler furnace, incomplete combustion due to insufficient air yields an excess amount of _______.

 

17. C3 - What does the indicator card or pressure-volume diagram show?

 

18. C3 - What condition of an inlet manifold pressure does a turbocharged diesel engine have in relation to the load?

 

19. C3 - 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 _____.

 

20. C3 - If crank web deflection readings is positive, what does this indicate?

 

21. C3 - If fuel injection to a four-stroke/cycle diesel engine begins earlier than designed, why is ignition maybe delayed?

 

22. C3 - When a diesel engine compression pressure is checked, where is the indicator connected?

 

23. C3 - If the speed of a turbocharged diesel engine is maintained constant, the turbocharger speed will _______.

 

24. C3 - Waterside grooving is usually very difficult to locate in a boiler tube before leakage occurs because _______.

 

25. C3 - Which of the following is used for bilge systems, evaporators and gas freeing systems on tanks?

 

26. C3 - What is a low cylinder compression pressure and a high exhaust temperature indicate from among the choices?

 

27. C3 - On a turbocharged, medium –speed, diesel engine, which of the following problems is an indication of a restricted air intake passage?

 

28. C3 - The speed of the turbocharger for a four-stroke/cycle diesel engine driving a generator at constant speed depends on the _______.

 

29. C3 - What statement is correct pertaining to Oily Water Separator, OWS?

 

30. C3 - A diesel engine is warmed up and white vapor is noted in the exhaust,what does this indicate?

 

31. C3 - What can cause a combustion knock occurring in a diesel engine?

 

32. C3 - What indicats a sudden increase in lube oil pressure to the main turbine?

 

33. C3 - 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?

 

34. C3 - 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 __________.

 

35. C3 - Which of the following conditions is responsible for the fuel oil to atomize when using a steam atomizer in an auxiliary boiler?

 

36. C3 - What is a practical way of checking for excessive fuel injection in one cylinder of an operating diesel engine?

 

37. C3 - Which of the listed conditions would indicate a dirty atomizer sprayer plate?

 

38. C3 - Excess air must be provoked to an operating boiler to allow for _______.

 

39. C3 - The potable water piping systems in ships must be ____________.

 

40. C3 - 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?

 

41. C3 - If a boiler is smoking a black and increasing the boiler front air box pressure does not reduce the smoke, the cause can be ______.

 

42. C3 - What can cause black smoke exhausting from an operating diesel engine?

 

43. C3 - If fuel injection occurs too early, a diesel engine will lose power for what reason?

 

44. C3 - The development of pinhole leaks where the boiler tubes enter the water drums and headers, may be evidence of _______.

 

45. C3 - What do pyrometers commonly found on diesel engine exhaust systems consist of?

 

46. C3 - Ejectors are simple, reliable, inexpensive, effective and ______________.

 

47. C3 - What can cause white smoke exhausting from a diesel engine?

 

48. C3 - What is the sign of an early injection timing in a diesel engine?

 

49. C3 - Regarding main propulsion boilers, what condition would normally be indicated if the bridge reported that white smoke was observed coming from the stack?

 

50. C3 - Poor atomization accompanied by an elongated flame from a stem atomization burner is most likely caused by _______.

 

51. C3 - 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?

 

52. C3 - If the turbocharger of a four-stroke /cycle diesel engine fails to operate properly, which of the following statements best describes the probable effect?

 

53. C3 - What will result in the longer ignition delay period resulting from the use of low cetane fuel?

 

54. C3 - Which of the following could result if there is late fuel injection in a diesel engine?

 

55. C3 - In a diesel engine, late fuel injection is indicated by black or gray exhaust smoke with ___________.

 

56. C3 - Late fuel injection in a diesel engine is indicated by low firing pressure. What might be the other indication?

 

57. C3 - Late fuel injection in a diesel engine is indicated by low firing pressure. What is the other indication?

 

58. C3 - White stack smoke from a main propulsion boiler could indicate _______.

 

59. C3 - What will be the result of prolonged operation of a diesel engine closed cooling sysetm with temperature lower than that of designated temperature?

 

60. C3 - On a steering gear system, what does the telemotor receiver unit control?

 

61. C3 - What is the main operating characteristic of diesel engines that distinguishes them from other internal combustion engines?

 

62. C3 - What is the purpose of the flywheel?

 

63. C3 - An operating turbocharged diesel engine that suddenly loses power, is due to a/an _______.

 

64. C3 - What might cause the sweating of the crankcase of a refrigeration compressor?

 

65. C3 - Diesel engine mufflers or silencers reduce the engine exhaust noise by _______.

 

66. C3 - What could influence the ratio of pressure rise during the period following initial fuel ignition in a diesel engine?

 

67. C3 - What maintains the crankshaft axial alignment on a large diesel engine installation?

 

68. C3 - When associated with main propulsion diesel engines, shaker, circulation, and spray are the three general methods used in __________.

 

69. C3 - A pneumatic pressure tank is installed in a sanitary system to _____________.

 

70. C3 - What is the secondary function of a waste heat boiler?

 

71. C3 - What is the primary function of a waste heat boiler?

 

72. C3 - When there is an increase in load on your boiler, what is needed to attain a good combustion?

 

73. C3 - A knocking sound from one cylinder of an operating air compressor indicates

 

74. C3 - The exposed portion of the outboard propeller shaft is protected against seawater corrosion by___________ .

 

75. C3 - A refrigeration system compressor crankcase is sweating or unusually cold. This is an indication of

 

76. C3 - In a low pressure air compressor, the loss of volumetric efficiency normally results from__________.

 

77. C3 - How is the speed of a radial piston hydraulic motor controlled?

 

78. C3 - How do we maintain constant steam pressure?

 

79. C3 - If the discharge valve is closed before the drive motor is stopped, which of the following types of pumps will most likely be damaged?

 

80. C3 - How is the designed capacity of a centrifugal pump being maintained?

 

81. C3 - Which of the following describes a characteristic of scale forming impurities in boiler water?

 

82. C3 - A good quality oil used in main propulsion engine lubrication systems should be________ .

 

83. C3 - The conical steel or composition cone installed on a propeller, known as a fairwater cone, provides which of the following benefits?

 

84. C3 - Which of the following statements is true concerning the overall efficiency of air compressors?

 

85. C3 - An important point of consideration when replacing a dry type intake filter on an air compressor is to______

 

86. C3 - When the relief valve opens it discharges high pressure refrigerant vapor to the____________.

 

87. C3 - How is dissolved oxygen in boiler feed water minimized?

 

88. C3 - 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 ________.

 

89. C3 - How do lubricating oil and grease gets into the boiler water system?

 

90. C3 - What is the function of a hydraulic telemotor transmitter used in an electro-hydraulic steering gear system?

 

91. C3 - 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 effeciency?

 

92. C3 - When is the highest pressure in a diesel engine cylinder normally occurred?

 

93. C3 - Excessive side clearance between a piston ring and its groove will cause the ring to____________.

 

94. C3 - A turbocharger is an air compressor driven by__________.

 

95. C3 - After a normal firing, you should check for a/an __________.

 

96. C3 - What is the device used to keep moisture from passing through the system?

 

97. C3 - An air conditioning system with clogged filters will have which one of the following conditions?

 

98. C3 - What is the purpose of turning a main propulsion diesel engine with the cylinder test cocks open prior to starting?

 

99. C3 - The rate of the fuel injection in a diesel engine cylinder depends primarily on ____________.

 

100. C3 - Excessive accumulation of carbon deposits on a boiler burner throat ring and diffuser could result in ______.

 

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