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1. In distilling units, salinity cells are strategically installed to indicate the

 
 
 
 

2. What is the reason for NOT using a chisel with mushroom head?

 
 
 
 

3. When the current to a suction modulating valve is increased on a container box refrigeration system, the______

 
 
 
 

4. How reefer thermostatic expansion valve can be adjusted

 
 
 
 

5. The compressor in a direct-type, multi-reefer chamber R-12 refrigeration system is made to cycle on and off by the _______.

 
 
 
 

6. Which of the following is TRUE concerning the COILS in the direct expansion refrigeration system?

 
 
 
 

7. What is the percentage of the total if all the reefer boxes have just recently been activated in a refrigeration compressor used in a multi-box refrigeration system design with six of its eight cylinders able to be controlled for variable load conditions?

 
 
 
 

8. What is the percentage of the total if all the reefer boxes have just recently been activated in a refrigeration compressor used in a multi-box refrigeration system design with six of its eight cylinders able to be controlled for variable load conditions?

 
 
 
 

9. A compressor used in a multi-box refrigeration system, has six of its eight cylinders controlled for variable loads. How many percent of the controlled cylinders will be unloaded, if only one of five reefer boxes is active?

 
 
 
 

10. The size of the loop seal orifice for a flash-type evaporator is important for maintaining the control of ___.

 
 
 
 

11. What will happen to the three way solenoid valve in the event of a power failure to the salinity panel on a flash-type evaporator?

 
 
 
 

12. The distillate produced by a flash evaporator has a salinity of 0.21 grains per gallon, with a feed water temperature entering the first-stage of the evaporator at 170oF. Under these conditions, what will happen to the three-way solenoid valve?

 
 
 
 

13. In a flash type evaporator, the temperature of the steam flow to the saltwater feed heater can be manipulated by a/an_______.

 
 
 
 

14. What is a flash chamber on a multistage flash-type evaporator?

 
 
 
 

15. What is the end result if a hole were to form in the division plate between stages of a flash type evaporator? I. Vaporization of the feed water would continue at second stage designed saturation conditions II. All of the distillate produced would be certain to be contaminated by salt water carry over

 
 
 
 

16. What is the effect when a hole were to form in the division plate between stages of a flash type evaporator? I. 2nd stage vacuum would increase II. Vaporization of the feed water would continue

 
 
 
 

17. In a flash-type evaporator, scale formation is usually found in the________

 
 
 
 

18. The rate of scale formation in the operation of a two-stage flash-type distilling plant is greatly reduced by______

 
 
 
 

19. What is the distinct advantage of flash type evaporators as compared to other evaporators?

 
 
 
 

20. Water purity is greatly increased at high capacity

 
 
 
 

21. On the flash vapor small droplets of water is entrained produce in a flash-type evaporator, are removed by the ________.

 
 
 
 

22. Air leaking into a flash type distilling plant could take place through_____

 
 
 
 

23. Indicated high salinity of the distillate discharged from a flash-type distilling plant will be a cause of______

 
 
 
 

24. What should you suspect if a higher than normal water level is observed through the inspection port of a flash evaporator?

 
 
 
 

25. During the replacement of the condenser HCFC-22 has been recovered from a refrigeration system, the refrigerant can be _________.

 
 
 
 

26. Which of the following refrigerants is known as HydroChloroFlouroCarbon (HCFC) - 22?

 
 
 
 

27. What is the explosive range of petroleum vapors when mixed with air?

 
 
 
 

28. Which of the following is the most affected in the pour point of lubricating oil?

 
 
 
 

29. Which one is included on a property of refrigerant?

 
 
 
 

30. What do we call the energy associated to molecules?

 
 
 
 

31. What do we call the energy associated with atoms forming molecules?

 
 
 
 

32. The function of water failure switch in a refrigeration system is to react to a loss of cooling water by:

 
 
 
 

33. What material is partly dissolve in iron and partly combines with cementite?

 
 
 
 

34. Which one increases and fatigue resistance fused in conjunction with molybdenum for boiler tubes?

 
 
 
 

35. Testing boiler water with phenolphthalein means ______.

 
 
 
 

36. What will happen in an automatic auxiliary boiler when steam demand is reached?

 
 
 
 

37. On an automatic auxiliary boiler, controlling burner circuitry proceeds through normal methods by:

 
 
 
 

38. What is the best position of atomizer feeding oil to a steam engine cylinder?

 
 
 
 

39. Which of the following is NOT the cause for the fuel oil solenoid valve to close in an automatic package boiler?

 
 
 
 

40. Which one should NOT enters the boiler so that it will not explode?

 
 
 
 

41. In the salt-water side of the heat exchanger the scale formation will increase if it is:

 
 
 
 

42. What will be the result if we temper a metal?

 
 
 
 

43. What will happen to the governor if the load decreases?

 
 
 
 

44. Which of the following we use for fuel and road oil which differ from reddish brown to jet black?

 
 
 
 

45. What kind of oil which is dark brown in color with a slightly reddish tinged?

 
 
 
 

46. What instrument is used to verify the specific gravity of oil?

 
 
 
 

47. What do we call the ratio of absolute viscosity of oil to the absolute viscosity of water?

 
 
 
 

48. What is the ratio of absolute viscosity of oil to specific gravity of oil?

 
 
 
 

49. A products as gasoline and kerosene have been detached from what grade of crude oil or partly refined crude?

 
 
 
 

50. Why those joints must be appropriately aligned before connecting a pipeline?

 
 
 
 

51. What is the reason of small amount of water permitted to leak through the stem stuffing box if a vessel is underway?

 
 
 

52. In avoiding oil from discharge into the sea when ballasting is to

 
 
 
 

53. Which of the following is use to meet the standard of a extra strong and double extra strong weights of pipe?

 
 
 
 

54. Why is it copper piping is used in R-12 systems?

 
 
 
 

55. Copper piping is used in refrigeration because ____________________.

 
 
 
 

56. What is the dew point temperature if air contains some moisture, but is not saturated?

 
 
 
 

57. Why that it is necessary to arrange the cylindrical driers installed in halocarbon refrigerant system?

 
 
 
 

58. What causes a pressure drop in the liquid line of a refrigeration system?

 
 
 
 

59. The current box temperature of a vessel receive a refrigerated container loaded with 9 long tons of ice cream is 31°F but has a normal set point of minus 10°F. Under ideal conditions how long will it take to pull the box temperature down to set point?

 
 
 
 

60. What refrigerants will normally require water cooled compressor components?

 
 
 
 

61. Which of the following should we use and the most cost-effective method of recovering refrigerant from a chiller with more than 5 lbs of refrigerant, to meet EPA requirement?

 
 
 
 

62. A refrigerant dehydrator charge with silica gel in addition to moisture is design to absorb ________.

 
 
 
 

63. Which of the following refers to “Tare Weight” of a refrigerant cylinder?

 
 
 
 

64. Which statements describe oil lubricated stern tube bearing installation?

 
 
 
 

65. Which one is a mechanical mixture of highly refined metallic iron and small amount of slag which is resistant to corrosion in ordinary atmospheres and welds readily?

 
 
 
 

66. Which of the following refrigerating equipment converts a liquid into a vapor at temperatures below its critical point?

 
 
 
 

67. A system where two-stroke cycle diesel engines that exhaust gases are forced through ports in cylinder wall rather than through exhaust valves called ________.

 
 
 
 

68. In the water the concentration of total dissolved solids of an auxiliary boiler could increase, this is the effect of ________.

 
 
 
 

69. The main bearings in a diesel engine are used between the_________.

 
 
 
 

70. What is the CORRECT procedure to lower the salinity of boiler water?

 
 
 
 

71. What do you call a device which prints out a permanent record of the plant operating conditions?

 
 
 
 

72. Which of the following is the characteristic of a “hydroscopic” lubricant used in refrigeration compressor?

 
 
 
 

73. What will be the result if an indication of high salinity in the distillate discharged from a low pressure distilling plant?

 
 
 
 

74. What will you suspect if a higher than normal water level is observed through the inspection port of a low?

 
 
 
 

75. In a low pressure distilling plant, an excessively high brine level can be caused by_______.

 
 
 
 

76. While standing watch in the engine room, you suspect an air leak while checking a low pressure distilling plant. Which should be check as possible cause of air leak?

 
 
 
 

77. You notice a carryover occurring in a low pressure distilling plant while standing watch underway. This can be a result of_______.

 
 
 
 

78. When a flash-type evaporator was designed to operate in seawater at 75oF and the current seawater temperature is 50oF without readjusting any valve associated with this evaporator

 
 
 
 

79. When distillate temperature from a flash type evaporator falls below 160oF:

 
 
 
 

80. The excess brine in the first stage of a two-stage flash-type evaporator automatically passes

 
 
 
 

81. Which of the following conditions will cause feed-water that has not flashed to vapor in the first- stage of a flash evaporator, to flow into the second stage?

 
 
 
 

82. What will happen if a flash type evaporator design to operate in 75oF seawater is operated in 50oF sea water?

 
 
 
 

83. What is the function of the loop seal as typically provided on a flash type evaporator?

 
 
 
 

84. On the distillate circuit, a vacuum differential is maintained between any two stages of a multiple stage distilling plant by the use of a/an ________.

 
 
 
 

85. The function of the orifice in the flash evaporator loop seal while in operation is to

 
 
 
 

86. What will happen if the orifices in a loop seal of a flash evaporator will become significantly enlarge through erosion?

 
 
 
 

87. What medium of cooling should we use in the condenser located in the various stages of a flash evaporator?

 
 
 
 

88. The sea water feed temperatures is increased in a two-stage flash evaporator as it passes through the________.

 
 
 
 

89. What will happen to the heated feed water enters in any flash chamber of a flash-type evaporator?

 
 
 
 

90. In a flash type distilling plant, the final heating of the feed-water is carried out by

 
 
 
 

91. Heated feed-water is vaporized in a two stage flash evaporator in the

 
 
 
 

92. The description that best identifies the operating principal of a flash type evaporator is

 
 
 
 

93. Heated water under pressure is converted into vapor in a flash type evaporator by suddenly________.

 
 
 
 

94. In a flash evaporator, vapor is produced by introducing_______

 
 
 
 

95. On the first stage feed water supplied to a flash type distilling plant will flash to vapor due to _______.

 
 
 
 

96. An evaporator according to regulations is classified as a/an:

 
 
 
 

97. What do you call the process of boiling seawater in order to separate it into freshwater vapor and brine?

 
 
 
 

98. What do you call the cooling phase of production in the production of freshwater from seawater through a process of heating and cooling?

 
 
 
 

99. Which of the following is TRUE in a scale accumulation on evaporator heat exchange surface?

 
 
 
 

100. In the fresh water distillation process, diesel engine jacket water is used as the

 
 
 
 

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