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

USCG Motor Plants & Auxiliary Boilers (Set 26)

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Question 1 of 30

Valve '1', as shown in the illustration, should be operated when __________. Illustration MO-0077

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30 MCQs

#1 Valve '1', as shown in the illustration, should be operated when __________. Illustration MO-0077 #2 Which of the following methods is normally used to lubricate bearings in a small high-speed diesel engine? #3 The illustrated device is operated directly by __________. Illustration MO-0041 #4 Movement of the pump control rack in a fuel injection system using individual plunger-type pumps __________. #5 Sacrificial zinc anodes are used on the salt water side of diesel engine heat exchangers to __________. #6 In a diesel engine jacket water cooler, with sea water cooling the fresh water, the __________. #7 What is the average piston speed of a five cylinder low-speed engine with a bore of 29.5 inches (75 cm), a stroke of 63 inches (160 cm), and a rated speed of 123 RPM? #8 A six cylinder, two-stroke cycle diesel engine is 83% efficient and has a cylinder constant of 0.998 while operating with a mean effective pressure of 15 kg/cm2 at a speed of 100 RPM. What is the metric brake horsepower developed? #9 An eight cylinder, four-stroke cycle, single acting diesel engine has a 650 mm bore and a 1400 mm stroke. What will be the developed indicated metric horsepower if the average mean effective pressure is 30 kg/cm2 at a speed of 100 RPM? #10 The speed of the camshaft in a two-stroke cycle diesel engine, running at 950 RPM, is __________. #11 If the piston stroke in a four-stroke cycle diesel engine is 10 1/2 inches and the speed of rotation of the crankshaft is 720 RPM, what is the average piston speed? #12 A four cylinder, four-stroke cycle, single acting diesel engine has a 740 mm bore and a 1500 mm stroke. What indicated power will be developed if the average mean effective pressure is 18 kg/cm2 at a speed of 90 RPM? #13 Which of the following conditions will cause the engine to operate in area "A" of the diagram shown in the illustration? Illustration MO-0126 #14 The indicator card shown in the illustration is produced with a/an __________. Illustration MO-0108 #15 In the pressure-volume diagram, shown in the illustration, what occurs between points "e" and "f"? Illustration MO-0035 #16 Which of the following relationships exist between the temperature developed in a combustion space, and the compression ratio of the engine? #17 The component shown in the illustration would be identified as a/an __________. Illustration MO-0097 #18 The component identified as item No.15 is used to __________. Illustration MO-0016 #19 In the large slow-speed main propulsion diesel engine shown in the illustration, the part labeled "G" is the __________. Illustration MO-0003 #20 Regarding the fuel injector shown in the illustration, the purpose of piece #38 is to __________. Illustration MO-0059 #21 Which type of diesel engine fuel nozzle is shown in the illustration? Illustration MO-0059 #22 A main propulsion diesel engine is normally shutdown by __________. #23 The overspeeding of the diesel engine driving an electric generator could cause __________. #24 The pneumatic circuit shown in the illustration is part of a control system used with large low-speed diesel engines. The arrangement may be used to control __________. Illustration MO-0118 #25 The 3-position, 4-way directional control valve with a 30 bar output at "ee" as shown in the illustration (MO-0116) is a blocking valve associated with the engine turning gear. Which of the following statements describes its function when incorporated into a slow-speed diesel engine starting control air distributor as shown in the illustration (MO-0053)? Illustrations MO-0053 and MO-0116 #26 Which of the types of reduction gearing listed is best suited for medium-speed main propulsion units? #27 How is lubrication provided to the device shown in the illustration? Illustration MO-0120 #28 What prevents the thrust bearing blocks shown in the illustration from rotating within the housing? Illustration MO-0120 #29 Which area of the indicator diagram illustrated, indicates the ignition delay period in a diesel engine cylinder? Illustration MO-0033 #30 On the cylinder indicator diagram illustrated, the maximum rise in pressure occurs during the period labeled as ______. Illustration MO-0033

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