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

USCG Motor Plants & Auxiliary Boilers (Set 29)

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Question 1 of 30

The outlet from an expansion tank of a closed fresh water cooling system should be piped to the __________.

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30 MCQs

#1 The outlet from an expansion tank of a closed fresh water cooling system should be piped to the __________. #2 Which set of valves will be opened intentionally to remove heat from the main engine jacket cooling water system shown in the illustration? Illustration MO-0111 #3 What is the function of the device labeled "3" shown in the illustration? Illustration MO-0111 #4 What is the function of the item "7" shown in the illustration? Illustration MO-0111 #5 The operation of the lube oil cooler, shown in the illustration as item No.4, will be characterized by which of the following statements? Illustration MO-0111 #6 What is the primary function of item '15' shown in the illustration? Illustration MO-0111 #7 Which of the following statements represents the two major functions provided by the item labeled "20" shown in the illustration? Illustration MO-0111 #8 The items labeled "21" and "22", shown in the illustration are used to remove __________. Illustration MO-0111 #9 Which of the following statements describes what will occur to the volume of water vapor as it is exposed to the lower temperatures existing in the device labeled "24" shown in the illustration? Illustration MO-0111 #10 Device "27" shown in the illustration is used to __________. Illustration MO-0111 #11 Which of the valve arrangements listed would be correct for operating the distillation plant shown in the illustration? Illustration MO-0111 #12 Excess brine accumulated in the distiller, shown in the illustration, is removed during normal operation by __________. Illustration MO-0111 #13 During operation which device listed removes air and non-condensable gases from the unit shown in the illustration? Illustration MO-0111 #14 The graphic dotted line between items "27", "12", "9", and "20", shown in the illustration, is used to indicate the use of __________. Illustration MO-0111 #15 Excluding line losses, how many distinct pressure drops will occur as sea water flows through all the heat exchangers in the cooling system shown in the illustration? Illustration MO-0111 #16 Which device is used to prevent overpressurization of the illustrated distiller? Illustration MO-0111 #17 Where is the latent heat obtained to create vapor from the feedwater in the illustrated distiller? Illustration MO-0111 #18 Which of the following statements describes the approximate relation between the feedwater entering the unit shown in the illustration and brine being removed? Illustration MO-0111 #19 Cooling water pumps driven by direct reversing diesel engines are usually __________. #20 When would the available energy of the exhaust gases of a two-stroke cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion? #21 Aftercooling of a turbocharged diesel engine will result in __________. #22 The process of scavenging a two-stroke cycle diesel engine serves to __________. #23 The average exhaust temperature of a two-stroke cycle diesel engine with a turbine-driven supercharger is lower than a similar four-stroke cycle diesel engine at equal loads because __________. #24 During the valve overlap period, the exhaust pressure of a turbocharged, four-stroke cycle diesel engine must be less than the intake manifold pressure to ensure __________. #25 Air scavenging of the cylinder shown in the illustration begins between figures __________. Illustration MO-0025 #26 Large, two-stroke cycle, main propulsion, diesel engine cylinders can be successfully pressure charged during normal operation, by using the __________. #27 Which of the turbocharging methods listed directs the exhaust gases to the turbine at fairly uniform velocity and pressure? #28 Which of the turbocharging systems listed operates with the least average back pressure in the exhaust manifold? #29 In a two-stroke cycle diesel engine, a Roots-type blower is usually __________. #30 Clearance volume scavenging in a turbocharged, four-stroke cycle diesel engine is accomplished __________.

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