Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR

USCG General Subjects (Auxiliaries & Systems) (Set 20)

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Question 1 of 30

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Question 1 of 30

Which of the tools listed must be used when retightening the plate type heat exchangers used in the device shown in the illustration? Illustration MO-0110

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30 MCQs

#1 Which of the tools listed must be used when retightening the plate type heat exchangers used in the device shown in the illustration? Illustration MO-0110 #2 Which of the following statements describes the approximate relation between the feed water entering the unit shown in the illustration and brine being removed? Illustration MO-0111 #3 Excess brine accumulated in the distiller, shown in the illustration, is removed during normal operation by __________. Illustration MO-0111 #4 Which of the following statements represents the two major functions provided by the item labeled "20" shown in the illustration? Illustration MO-0111 #5 Which of the following statements concerning the systems shown in the illustration is correct? Illustration MO-0111 #6 When securing a jacket-water heated submerged tube evaporator for an extended period of time, you should __________. #7 Which of the following acids is preferable and most commonly used for scale removal from the heating surfaces of the jacket-water heated submerged-tube evaporator? #8 What would be the first indication that a tube leak has occurred in area "23"? Illustration MO-0111 #9 Which of the conditions listed would indicate a large condenser tube leak within the distiller shown in the illustration? See Illustration MO-0111 #10 If valve "H" shown in the illustration is opened wide while the distiller is in operation, __________. Illustration MO-0111 #11 If the wearing rings of device "7" shown in the illustration become worn, how will the evaporation rate in "23" be affected? Illustration MO-0111 #12 What would happen if valve "25" shown in the illustration, vibrated open with the unit in operation? Illustration MO-0111 #13 If valve "D" is opened during the normal operation of the distiller shown in the illustration, which of the events listed will occur? Illustration MO-0111 #14 Regarding a reverse-osmosis type freshwater generator using multiple spiral-wound membrane modules, what statement is true? #15 For the successful operation of a reverse-osmosis freshwater generator, why is the high pressure pump required to operate in the 750 to 1200 psig range for a discharge pressure? #16 What component of a reverse-osmosis freshwater generator could be isolated and replaced with the unit remaining in service? #17 If a reverse-osmosis freshwater generator has fouled membrane modules, what statement is true? #18 What is the BEST indication that the membrane module is damaged and is no longer semi-permeable and allowing the solute to pass through? #19 A salinity indicator is used to determine the __________. #20 A salinity indicating system functions on the basic principle of measuring the __________. #21 The instrument always used in conjunction with a salinometer is a __________. #22 Which of the following statements represents the basic principle of operation of an electrical salinity indicator? #23 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? #24 Which of the following desalination plants will always require a sterilizer when providing water to a potable water system? #25 On most commercial cargo vessels with a relatively small crew size and few users of the potable water system, how is the potable water system pressure maintained? #26 What design feature is used to minimize potable water wastage associated with hot water distribution piping for a potable water system? #27 Which of the following speed control devices is used strictly as a safety device to prevent prime mover damage and acts by shutting down the prime mover? #28 Which of the following statements is true concerning the application for an isochronous governor? #29 Which term represents the ability of a speed control governor to maintain prime mover speed without hunting? #30 What is meant by the term "hunting" as it applies to prime mover speed control governors?

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