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8
第1题：
If all other conditions such as bore, stroke, speed, and mean effective pressures are equal, a two stroke/cycle diesel engine will develop approximately
A.the same indicated horsepower as a four-stroke/cycle engine
B.twice the indicated horsepower as a four-stroke/cycle engine
C.one half the indicated horsepower as a four-stroke/cycle engine
D.one power stroke for every two crankshaft revolutions
第2题：
after TDC
before TDC
after BDC
before BDC
第3题：
Our plane ______at six and landed in Beijing
A. takes off, within four hours
B. took off, four hours later
C. rose up, after four hours
D. raised up, in four hours
第4题：
supercharging
scavenging
turbulence
swept volume charging
第5题：
after TDC
before TDC
after BDC
before BDC
第6题：
第7题：
less even torque
higher cylinder head temperatures
fewer power strokes per revolution
greater weight/size requirements
第8题：
Proper lubrication of the main bearings is more easily obtained in a single acting, four-stroke/cycle diesel engine than in a tow-stroke/cycle diesel engine because________.
A.The direction of pressure on the journal in four-stroke engine is continuously
B.positive feed lubricators are installed on all bearings of four-stroke engine, whereas as a splash feed system is used on tow-stroke engine
C.four-stroke engines usually utilize a heavier grade of oil than tow-stroke engines
D.Low-stroke engines usually consume less lube oil than four-stroke engines
第9题：
one propulsion
two propulsions
two revolutions
one revolution
第10题：
half the engine speed
twice the engine speed
the engine speed
four times the engine speed