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1. In vibration of two stroke low speed diesel engine, what is the term harmonic excitation?

 
 
 
 

2. In vibration of two stroke low speed diesel engine, what is the term resonance?

 
 
 
 

3. What are the two basic classifications of a pressure switch? I. Mechanical II.Electromechanical III.Solid state

 
 
 
 

4. The most common type of electromechanical pressure switch is composed of a ________. I.sensing element II.mechanicalsnap-on switch III.electrical snap-action switch

 
 
 
 

5. Differential, bourdon tube, piston, diaphragm & diaphragm sealed piston are different kinds of _______.

 
 
 
 

6. Electromechanical pressure switch are composed of a number of different types of sensing element, but they have one thing in common, that is _______.

 
 
 
 

7. As the sensing element is moving in response to changes in the system pressure, thru which their movement act directly on the _______.

 
 
 
 

8. As the pressure on the high pressure side of a differential pressure switches increases, the piston moves up, and at a preset differential pressure it will activate the _______.

 
 
 
 

9. As the pressure on the high pressure side of a differential pressure switches increases, or pressure on the low pressure side decreases, the piston moves up, and at a preset differential pressure it will activate the _______.

 
 
 
 

10. If the pressure on the high pressure side of a differential pressure switches increases, the piston will _______.

 
 
 
 

11. If the pressure on the low pressure side of a differential pressure switches decreases, the piston will _______.

 
 
 
 

12. What is the direction of movement of the piston of a differential pressure switch, when the pressure on the high pressure side decreases?

 
 
 
 

13. What is the direction of movement of the piston of a differential pressure switch, when the pressure on the low pressure side increases?

 
 
 
 

14. A typical pressure switch which act directly on the snap action switch to a predetermined pressure up to 150 psi with +/- 0.5% accuracy is categorized as a ______.

 
 
 
 

15. Diaphragm pressure switches use a weld sealed metal diaphragm which directly acts on a snap-action switch at a pressure ______.

 
 
 
 

16. What is the category of a pressure switch which act directly on the snap action switch from 50 to 18,000 psi at +/- 0.5% accuracy?

 
 
 
 

17. Bourdon Tube pressure switches use a weld sealed bourdon tube which directly acts on a snap-action switch at a pressure ______.

 
 
 
 

18. What is the category of a pressure switch with elastomeric material which act directly on the snap action switch from vacuum to 16,000 psi at +/- 0.2% accuracy?

 
 
 
 

19. Diaphragm piston pressure switches use elastomeric diaphragm acting on a piston which directly acts on a snap-action switch at ______.

 
 
 
 

20. What is the category of a pressure switch with o-ring sealed material which act directly on the snap action switch at 12,000 psi and +/- 0.2% accurate?

 
 
 
 

21. Piston pressure switches use o-ring sealed piston which directly acts on a snap-action switch at ______.

 
 
 
 

22. Which of the following list of company first to introduced the solid-state pressure switch?

 
 
 
 

23. Which of the following list of company first to introduced the solid-state pressure switch?

 
 
 
 

24. Which of the following is/are the characteristic/s of a solid state pressure switch comparable to electromechanical switches? I.Lesser cycle life II.High resistance to shock and vibration III. Handle a wide range of system pressure

 
 
 
 

25. Which of the following is/are the characteristic/s of a solid state pressure switch comparable to electromechanical switches? I.Much longer life II.Broader frequency response III. No electromagnetic interference which can corrupt signal data

 
 
 
 

26. Which of the following is/are the characteristic/s of a solid state pressure switch comparable to electromechanical switches? I.Much longer life II.Needs an input power source to function III. Electromagnetic interference which can corrupt signal data

 
 
 
 

27. Which of the following pressure switches is not subjected to metal fatigue?

 
 
 
 

28. Due to their design, electromechanical switches are subjected to metal fatigue, such as bourdon tube and diaphragm pressure switches with a typical _______.

 
 
 
 

29. Due to their design, electromechanical switches are subjected to metal fatigue, such as piston and diaphragm-piston pressure switches with a typical _______.

 
 
 
 

30. Due to their design, solid-state pressure switch is not subjected to metal fatigue, it will typically have a _______.

 
 
 
 

31. The maximum cycle life of a bourdon tube and diaphragm pressure switches can be increase from 1 million cycle life to 2.5 million cycle life before fatigue occurs when _______.

 
 
 
 

32. What is the best pressure switch to be selected whenever the cycle rate exceeds 50 cycles per minute?

 
 
 
 

33. What is the best pressure switch to be selected whenever the cycle rate is less than 25 cycles per minute?

 
 
 
 

34. What is the best pressure switch to be selected whenever the cycle rate is between 25 to 50 cycles per minute?

 
 
 
 

35. What is the proper setting of the switch point and the operating pressure range of a solid-state pressure switch?

 
 
 
 

36. What is the proper setting of the switch point and the operating pressure range of a electromechanical pressure switch?

 
 
 
 

37. A system which requires a switch to activate at 140 psi should use a _______.

 
 
 
 

38. Pressure surges and transient pressure spikes can greatly exceed the normal operating pressure of a system that would damage a sensitive pressure switch like _______.

 
 
 
 

39. Pressure surges and transient pressure spikes can greatly exceed the normal operating pressure of a system that would damage a sensitive pressure switch like _______.

 
 
 
 

40. Pressure surges and transient pressure spikes can greatly exceed the normal operating pressure of a system that would damage a sensitive pressure switch like _______.

 
 
 
 

41. Sensitive pressure switches are prevented from being damage from pressure surges and transient pressure spikes by installing a _______.

 
 
 
 

42. The ability of the pressure switch to repetitively operate at its setpoint is termed as _______.

 
 
 
 

43. What is the ability of the pressure switch to repetitively operate at its setpoint?

 
 
 
 

44. What is the sufficient accuracy of a pressure switch used for alarm?

 
 
 
 

45. What is the absolute necessary accuracy of a pressure switch used for controlling a process where the error of various device is additive?

 
 
 
 

46. Which of the following pressure switch is the least accurate? I. Piston II. Diaphragm III. Solid state switch46. Which of the following pressure switch is the least accurate? I.Piston II.Diaphragm III.Solid state switch

 
 
 
 

47. Which of the following pressure switch is the least accurate? I.Diaphragm II.Diaphragm-Piston III. Solid state switch

 
 
 
 

48. What type of pressure switch housing that is normally installed inside a panel or multi-function enclosure?

 
 
 
 

49. What is used in order to avoid possible hazards from loose wires in exposed locations?

 
 
 
 

50. Normally available in a variety of ratings with the most popular industrial switch housings being NEMA for corrosive environments is a ________.

 
 
 
 

51. A type of switch that is housed, equipped with enclosed terminal blocks and eliminates the expense of installing external junction boxes is called ________.

 
 
 
 

52. A type of switch that is designed with heavy housings built to conform to accepted NEMA standards in hazardous environment is called ________.

 
 
 
 

53. The difference between the actuation point and the re-actuation point in a pressure actuation switch is known as ________.

 
 
 
 

54. What is the deadband of the switch if it is set to operate at 100 psi on increasing pressure, the switch will close when the pressure rises to that point, and switch opens as the pressure drops to 95 psi.

 
 
 
 

55. The term used for the difference between the setpoint 100 psi and the re-actuation point of 95 psi is ________.

 
 
 
 

56. Deadband is sometimes referred to ________. I.Actuation value II.Differential III.Hysteresis

 
 
 
 

57. The deadband of a switch can be fixed or adjusted over a percentage of the full pressure range, as with safety devices that traditionally uses a ________.

 
 
 
 

58. The deadband of a switch can be fixed or adjusted over a percentage of the full pressure range, as with control circuits like hydraulic units uses a ________.

 
 
 
 

59. Which of the following pressure switch offer a fully adjustable deadband up to 100% of full scale?

 
 
 
 

60. To protect adequately the engine bearings, what type and better arrangement of lubricating oil filters is most practical?

 
 
 
 

61. One of the most popular types of compressor utilized for supercharging engine is the __________.

 
 
 
 

62. What is the primary purpose of providing the lubricating oil a pre-heater in an emergency stand-by diesel genset?

 
 
 
 

63. What is the term as the ratio of the volume at the end of heat addition to the volume at the start of heat addition?

 
 
 
 

64. The internal combustion engines never work on ___________.

 
 
 
 

65. Air standard efficiency of a diesel engine depends on _________.

 
 
 
 

66. Which plant on board the ship is most suitable for peak load?

 
 
 
 

67. A small electric heater located inside a cylinder of a diesel engine that preheat the air and aids the engine in starting is a _______.

 
 
 
 

68. In steam turbine installation, nozzle performs its work by changing _________.

 
 
 
 

69. In a four stroke engine, which of the following valve opens at 25° before BDC and closes 10° after TDC?

 
 
 
 

70. Which of the following statements describes the engine compression ratio?

 
 
 
 

71. What is the speed in RPM of a four cylinder four stroke diesel engine with 3000 power stroke per minute?

 
 
 
 

72. Brake mean effective pressure is higher than theoretical mean effective pressure on account of ________.

 
 
 
 

73. A sliding metal cylinder that reciprocates in a tubular housing either moved by gas or moved by fluid pressure is known as _________.

 
 
 
 

74. In comparison with a four stroke engine with same BHP, the fuel consumption for two stroke engine is ____________.

 
 
 
 

75. A cycle with two isothermal and two constant volume process is termed as ______________.

 
 
 
 

76. A boiler which generate heat from gaseous products of combustion specifically from a diesel engine is termed as ________.

 
 
 
 

77. Which apparatus or equipment is used to measure power output of engines?

 
 
 
 
 

78. What takes place in an inflow scavenging?

 
 
 
 

79. What is the effect of higher altitude on engine power?

 
 
 
 

80. Brake mean effective pressure is higher than theoretical mean effective pressure on account of ____________.

 
 
 
 

81. How does the expansion of cylinder wall relieve piston friction?

 
 
 
 

82. An important factor to be considered in designing exhaust system for diesel engines is the __________.

 
 
 
 

83. What is a controlled device which can stop at any point in its stroke and can be reverted without completing its stroke?

 
 
 
 

84. The area of the indicator card multiplied by the scale of indicator is the _____________.

 
 
 
 

85. What type of positive displacement pump that contain fluid within a flexible tube fitted inside the circular pump casing?

 
 
 
 

86. What do you called the process as the rotor turns, the part of the tube under compression closes forcing the fluid through the tube and when the tube opens to its natural state after passing of the cam it draws fluid into the pump?

 
 
 
 

87. What type of positive displacement pump that are widely use for pumping difficult materials such as sewage sludge contaminated with large particles, this pump consist of helical rotor about ten times as long as its width?

 
 
 
 

88. What type of pump that is use pressure created by gas?

 
 
 
 

89. Which of the following is/are NOT a characteristic of a velocity pump?

 
 
 
 

90. What type of a multi-phase pump, a rotodynamic pump with one single shaft that requires two mechanical seal, it often called a Poseidon pump?

 
 
 
 

91. What type of a multi-phase pump that is constructed of two inter-meshing screws that move the pumped fluid?

 
 
 
 

92. What type of a multi-phase pump that are basically multistage centrifugal pumps and widely used in oil well application as a method for artificial lift?

 
 
 
 

93. What type of a multi-phase pump that are single screw type typically used in shallow well of at the surface?

 
 
 
 

94. In the Sea Pollution Regulation 2010, prevention of oil pollution amendment “Form A” means ______________.

 
 
 
 

95. In the Sea Pollution Regulation 2010, prevention of oil pollution amendment “Form B” means ______________.

 
 
 
 

96. What is the function of a buffer tank in the multiphase pump?

 
 
 
 

97. Which of the following is/are NOT included in the impulse pump?

 
 
 
 

98. In an ideal gas, an enthalpy of gas functions only to ____________.

 
 
 
 

99. Enthalpy in the system is best described as ________.

 
 
 
 

100. Which mechanical energy of pressure that transformed into energy of heat?

 
 
 
 

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