Pass Benchmark: 70% • Standard: USCG NMC / 46 CFR

USCG Engine General (Supplementary) (Set 7)

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Question 1 of 30

The primary reason low pressure evaporators produce distillate more efficiently, and with less scale formation, than high pressure evaporators is __________.

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30 MCQs

#1 The primary reason low pressure evaporators produce distillate more efficiently, and with less scale formation, than high pressure evaporators is __________. #2 Which of the following statements is correct relative to distillation plant operation? #3 The efficiency of a flash type evaporator can be increased by __________. #4 Why would a flash type distilling unit be more efficient when operated in cooler seawater temperatures? #5 In a two-stage flash evaporator, the sea water feed temperature is increased as it passes through the __________. #6 Which of the following descriptions best identifies the operating principal of a flash- type evaporator? #7 In a flash evaporator, heated water under pressure is converted into vapor by suddenly __________. #8 What is the function of device "A" shown in the illustration? MO-0110 #9 Diesel engine jacket water is used in the fresh water distillation process as the __________. #10 Which of the following represents the motivating power fluid used in conjunction with the ejector pumps on plate type evaporators? #11 The primary function of line 'J' shown in the illustration is to __________. MO-0110 #12 The function of device "O" shown in the illustration is to __________. MO-0110 #13 What is used to prevent contamination of a potable water system supplying a plumbing fixture such as a galley sink from a backup of sewage sanitary drains? #14 Suppose the pressure switch used to control the "lead" potable water pump is set at 45 psig cut-in for pump start and 55 psig cut-out for pump stop. What would be an appropriate setting for the "lag" potable water pump? #15 What type of disinfection system has the disadvantage that it would fail to provide residual disinfectant in the potable water? #16 Which of the following desalination plants will always require a sterilizer when providing water to a potable water system? #17 Which of the following statements concerning the arrangements of a potable water system is true? #18 In order for microbiological growths to thrive in a fuel tank it is necessary for __________. #19 Why are heavy fuels not usually prone to the problems of microbiological infection? #20 Fuels as produced in a refinery are generally sterile; however, contamination can occur as fuels are __________. #21 Most type(s) of microbiological growths in fuel are __________. #22 The microbiological growths that affect fuel supplies can easily be transported from one location to another by __________. #23 An air compressor is equipped with an intercooler and an after cooler to __________. #24 The cylinders and intercoolers of most low pressure air compressor's are cooled by __________. #25 For any given volume of compressed air produced by a multistage air compressor, inter stage cooling will __________. #26 The unloading system on an air compressor will __________. #27 The usual method of unloading a low pressure air compressor at start-up is accomplished by __________. #28 Which of the listed devices would be installed at a control system air pressure reducing station? #29 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 __________. #30 One function of the air receiver in a compressed air system is to __________.

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