Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR
USCG Motor Plants & Auxiliary Boilers (Set 5)
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Question 1 of 30
In the pressure-volume diagram, shown in the illustration, the volume line is divided into 16 units indicating __________. Illustration MO-0035
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30 MCQs #1 In the pressure-volume diagram, shown in the illustration, the volume line is divided into 16 units indicating __________. Illustration MO-0035 #2 In the pressure-volume diagram shown in the illustration, curve 'A-d' indicates __________. Illustration MO-0035 #3 In the pressure-volume diagram, shown in the illustration, what is indicated to have occurred by the line connecting points 'd' and 'e'? Illustration MO-0035 #4 On the cylinder indicator diagram illustrated, the dotted line indicated as 'L' is describing the _________. Illustration MO-0033 #5 Which of the indicator diagrams illustrated depicts the condition that should be corrected by retarding only the timing? Illustration MO-0029 #6 On the indicator card shown in the illustration, lines 'A' and 'B' indicate __________. Illustration MO-0108 #7 Diesel engines are classified as reciprocating internal combustion engines because they __________. #8 What determines the number of events occurring in a cycle of operation in an internal combustion engine? #9 The thermal energy produced by an internal combustion engine is transformed into __________. #10 In describing engine operation, what does the term "cycle" mean? #11 The highest pressure in a diesel engine cylinder normally occurs __________. #12 Modern marine diesel engines equipped with mechanical fuel injection operate on a combustion cycle which is __________. #13 The load is always placed on the lower half of the main bearings in a/an __________. #14 The camshaft drive is designed to maintain proper camshaft speed relative to crankshaft speed. In maintaining this relationship, the camshaft drive causes the camshaft to rotate at __________. #15 Which of the terms listed below represents the operational speed at which excessive engine vibration is created? #16 The bore of a diesel engine cylinder describes the __________. #17 The cubic inch (or liter) displacement of a cylinder is determined by the diameter of the piston and the __________. #18 The compression ratio of a diesel engine refers to the ratio between the __________. #19 If the compression ratio is increased on any diesel engine, __________. #20 The theoretical minimum compression ratio necessary to ensure compression ignition in a direct injection diesel engine is __________. #21 The ratio of the brake horsepower to the indicated horsepower of a diesel engine is its __________. #22 The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing work. This is known as __________. #23 The average pressure exerted on a piston during each power stroke is termed __________. #24 Most practical diesel engines today operate on a cycle which is a combination of the Diesel and Otto cycles. In this process, compression ignition __________. #25 The pressure-volume diagrams illustrated are of four internal combustion engine cycles. Which one represents the theoretical diesel cycle? Illustration MO-0102 #26 If point #1 in the diagram shown is the beginning of gas compression, which of the cycles listed is being illustrated? Illustration MO-0036 #27 The minimum fuel oil delivery pressure required for efficient injection depends primarily on the __________. #28 Fuel injection systems are designed to primarily meter fuel, atomize fuel, and __________. #29 The degree of fuel atomization in a diesel engine cylinder depends primarily on __________. #30 The purpose of the delivery check valve used in a diesel fuel injection jerk pump is to __________.
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