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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The camshaft drive is designed to maintain proper camshaft speed relative to crankshaft speedIn maintaining this relationship, the camshaft drive causes the camshaft to rotate at（）A
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单选题When an air started, four-stroke/cycle diesel engine is being cranked, the starting air is admitted to each cylinder during what would normally be the（）A
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单选题According to the principle of four stroke diesel engine, what is the number of its efficient work stroke per revolution?（）A
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单选题The size of the exhaust valve opening is （）A
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单选题Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?（）A
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单选题In the cylinder head of a two-stroke/cycle diesel engine, valves are used for（）A
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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
WhiteB
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单选题The exhaust system for a turbocharged two-stroke/cycle diesel engine functions to（）A
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furnish energy to the turbochargerC
reduce engine room noiseD
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单选题Proper lubrication of the main bearing is more easily obtained in a single acting four-stroke/cycle diesel engine than in a single acting two-stroke/cycle diesel engine because （）A
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bearing pressure in a two-stroke/cycle single acting diesel engine is continually reversedC
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单选题In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.A
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two power strokes in a two-stroke/cycle engineC
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单选题How many power strokes per crankshaft revolution are there in an eight cylinder, two stroke/cycle diesel engine?（）A
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单选题A two-stroke/cycle diesel engine requires less starting air than a four-stroke/cycle diesel engine, of equal displacement, because the two-stroke/cycle diesel engine（）A
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考题
单选题The two strokes of a two-stroke/cycle diesel engine are （）A
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考题
单选题One of the differences between a two-stroke engine and a four-stroke engine is,（）A
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单选题For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.A
it has a longer power strokeB
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it develops twice as many power strokes at the same speedD
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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
A common rail engine；conventional enginesB
A conventional engine；common rail enginesC
A marine diesel engine；most other enginesD
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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
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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
neither (1) nor (2)
考题
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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