62. Excess refrigerant in a refrigeration system is normally removed from the

61. The correct radial clearances between the rotor and the casing in a propulsion turbine are maintained by the turbine

29. Where are moisture shields located in a main propulsion steam turbine?

118. Cylinder oil is used for ?

79. What would be the result if the fuel used for boiler burners has sediments?

34. What is the purpose of maintaining an electrical lamp inside the boiler during a dry preservation method ?

45. What needs to be done in order to maintain the gas turbine sustainable power output?

46. The heat gained per pound of refrigerant in the evaporator is known as they

110. What is the importance of the control box of a differential gear system in a steering gear system?.

88. Feedwater supplied to a flash type distilling plant will flash to vapor in the first-stage due to ?

81. When operating under constant load, the superheated steam temperature may rise above normal it

47. Which of the following purpose of a safety valve fitted in the cylinder cover of a diesel engine?

97. Fuel oil enters the main engine cylinder through?

129. What action would you take to perform the most important rule for the safe operation of a boiler?

22. What is the function of double-volute casing of a centrifugal pump?

35. Which of the valves listed below permits its flow in only one direction?

53. What may happen if bubbles are present in a refrigeration system?

122. The function of a centrifugal pump double volute casing is to ?

128. If the fixed orifice in the evaporator steam supply line were to be removed, the steam pressure reducing valve located upstream would

89. Every automated machinery plant must have an engineers assistance alarm. Power for this alarm should be taken from the

15. Any unusual or new vibration in the hull or propeller shafting can be an indication of

43. Having high exhaust temperatures would affect the ?

25. Jacket water temperature in a closed cooling system of a diesel engine is normally controlled by ?

126. Which of the following would result if the temperature of the fuel to the burners is too low?

99. The operation of a thermostatic steam trap depends upon the ?

33. What is mainly the reason why fuel injectors used in heavy fuel oil systems are provided with cooling?

135. What causes carbon deposits in the fuel heater?

8. To prevent fire inside scavenge air spaces in marine diesel engines, it is important that it should be occasionally?

27. The capacity of a rotary pump will decrease with an increase in the pump

23. What part of a refrigeration system reduces the pressure of a liquid refrigerant?

92. Explain what is the use of Stern tube ?

One of the major components of centrifugal pump is ?

7. Increasing the compression ratio of a diesel engine while maintaining the designed rate of fuel flow will result in ?

104. The capacity of a rotary pump, when operated at a constant speed, will decrease with an increase in the pump?

86. Why diesel engine lubricating oil need more purification compare with the lubricating oil in a gas turbine?

113. Which of the following cases listed below should soot blowing be applied to avoid soot fires ?

38. Some engines are using auxiliary electrically driven blowers, which is continuosly running during maneuvering, and automatically cut-off, if the scavenge air pressure reaches_ load.

119. The average pressure exerted on a piston during each power stroke is termed

3. An important point of consideration when replacing a dry type intake filter on an air compressor is to

95. Boiler safety valves are set not to go above maximum operating pressure of higher than ?

18. What is the primary function of a fuel delivery check valve assembly ?

131. Inspection of a low pressure gear pump for cavitation will usually be indicated by a wear pattern ?

39. The set point pressure at which the boiler safety valve is to lift to ?

120. Strainer is commonly used in hydraulic system in order to ?

14. A loud clicking noise occuring from within the valve compartment of an operating diesel engine would indicate ?

100. Which combination of the main shaft segments listed below that are located furthest from the main engine are connected by the inboard stern tube shaft coupling?

134. One of the routine tasks onboard maintenance for Gas Turbine is mainly of daily visual checks of the running engine. What are you going to execute after a fix number of operating hours to remove any salt deposits on the compressor?

28. Moisture in a refrigeration system will cause a

59. Humidity is the measure of the ?

5. It is possible to mount a double suction centrifugal pump impeller with the vanes facing the wrong direction. This would cause the pump

71. If the existing vapour pressure is subtracted from the indicated pressure at the pump suction, the remainder is the ?

4. One of three available centrifugal sea water service pumps is in operation with a sea water temperature of 50 deg fahrenheit. The cooling temperature of all systems supplied by this pump appear to be high. Therefore, which of the following is required?

How will you know the firing rate of boiler using steam atomization indicated?

125. Which of vthe following is the primary purpose of heaters in a pressurized fuel oil system?

116. What is the characteristic of a one ton air conditioning system?

130. How do you control freshwater heating temperature in the evaporator side of a Fresh Water Generator?

78. Condensers located in the various stages of the flash evaporator are cooled by ?

96. Which of the following is used as moisture arrester and dryer in the refrigeration system?

91. If the exhaust oil is returned directly to the pump suction, what type of hydraulic circuit is the system?

55. Why is the heating capacity of the fuel oil heater reduced when there is a build up of carbonization in the heater surfaces ?

21. Air compressor cylinder unloader enable the compressor to ?

103. To keep the movement of the rudder closely in step with the steering wheel, which of the devices listed, when used on an electro-hydraulic steering gear?

13. Which of these bearings listed below is preferred by makers for use in the engine room supply blowers?

37. Which of the following is used extensively to lubricate rolling contact bearing ?

24. One method of constructing large marine diesel engines and reducing the total engine frame weight is through?

123. Distortion of the spray pattern of a nozzle or injector maybe indicated by alan ?

40. If the control pressure for an automatic combustion control system is lost during maneuvering, you should

9. If it becomes necessary to clean the spray holes of a fuel injector in a diesel engine which of the following is to be used ?

101. Air leaking into a flash type distilling plant could occur through

132. Integral water jacket liners use O-rings near the bottom of the liner. These O-rings serve to ?

56. Scavenging fire occur if the engine piston rings are?

87. The pressure developed in the high pressure cylinder of a reciprocating air compressor, in order to assure an output near the end of its compression stroke, is ?

44. In relation to air conditioning system, where is the latent heat of water vapor depends ?

10. When there is excessive formation of frost in the evaporator coils, it will ?

127. Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is to ?

76. In a large, low-speed diesel engine the clearance between the piston crown and cylinder

58. How can we quickly reduce high water level in a steaming boiler?

82. An engineer on duty inspecting an unmanned engine room at night should be aware of which of the following precautions ?

98. Gland sealing steam is used during steam turbine operation to prevent the loss of

85. The difference between the setpoint and the measured parameter in an automatic flow controller is called:

30. Breaking the fuel into fine spray to provide good combustion is called,

73. What is the purpose of the boiler drum air cock?

36. The fundamental difference between a 2-stroke and a 4-stroke engine is in the number of ?

64. Which one of the following devices use to control the admission of steam to the steam cylinder of a reciprocating pump ?

115. If the flow of water from the centrifugal pump is allowed to be stopped by closing the discharge valve while the pump continues to run for an extended period, which of the following will occur?

90. If an air compressor is used to supply air primarily to the combustion control system and other pneumatic controllers, the entire system is known as the ?

83. You observedan efficiency drop caused by compressor fouling of the gasturbine, what is the most effective counter measure to carry out?

133. What part of the boiler provides water circulation to the waterwall tubes?

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

109. Movement of the pump control rack in a fuel injection system having individual plunger-type pumps ?

75. The demisters installed in a flash-type evaporator serve to ?

20. The function of the spring used with channel or plate-type valves for reciprocating air compressors is to

49. What is the most effective method in removing water from diesel fuel oil ?

111. Which of the following component is the primary shaft emerging out of the engine. It directly receives the rotational motion from the crankshaft and rotates at the maximum velocity in high-speed engines.

84. In a fuel oil burner having a standard mechanical atomizer, the fuel and air are mixed as the fuel leaves the ?

41. Air leakage between the shaft and stuffing box packing in a centrifugal pump is prevented by ?

66. When should be a boiler water sample be taken for testing?

65. Cylinder inlet valve failure in a low pressure air compressor can be caused by ?

19. The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing work, which is known as ?

94. A centrifugal pump may fail to deliver water when first started if the