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单选题
According to the principle of two stroke diesel engine, what is the number of its efficient work stroke per revolution?（）
A
1/2
B
1
C
2
D
3
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单选题What color exhaust will be exhibited when a slow speed two-stroke/cycle main propulsion diesel engine, designed to operate on light and heavy fuel oil, is operated on insufficiently preheated heavy fuel oil?（）A
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考题
单选题According to the principle of two stroke diesel engine, what is the number of its efficient work stroke per revolution?（）A
1/2B
1C
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考题
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单选题In the two stroke diesel engine, it is designed so that the oil impingement is timed to proceed only on the piston ring belt during（）A
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单选题One of the differences between a two-stroke engine and a four-stroke engine is,（）A
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it has a longer power strokeB
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单选题（）uses one or two high pressure pumps for all the cylinders with one more standby, while（）have a separate high-pressure pump for each cylinder.A
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单选题A six-cylinder, two-stroke/cycle diesel engine is fitted with a rotary distributing air starting systemThe speed of the rotating distributor disc is （）A
one-half engine speedB
the same as engine speedC
twice engine speedD
four times engine speed
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单选题What is the crank angle between any two crank throws in the firing order of a four-stroke/cycle, in line, eight cylinder diesel engine?（）A
45B
60C
90D
100
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单选题One of the differences between a two-stroke engine and a four-stroke engine is,（）A
a two-stroke engine can’t work without cylindersB
a two-stroke engine can’t work without pistonsC
a two-stroke engine can’t work without crankshaftsD
a two-stroke engine can’t work without a blower
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单选题A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the （） (1) scavenging air is cooling the exhaust gases (2) exhaust cycle time is longerA
(1) onlyB
(2) onlyC
both (1) and (2)D
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单选题A piston in a four-stroke/cycle diesel engine makes four strokes during each （）.A
crankshaft revolutionB
mechanical cycle of operationC
period of two combustion cyclesD
cycle of two events
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