單項(xiàng)選擇題

In a diesel engine, blow-by（）

A.increase exhaust back pressure
B.causes excessive crankcase pressure
C.can only be detected by a compression check
D.decreases fuel consumption

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單項(xiàng)選擇題

A diesel engine will lose power if fuel injection occurs too late in the cycle, because the（）

A.fuel droplets will burn as they leave the fuel injector
B.fuel will not be properly atomized in the cylinder
C.maximum expansion of the burned fuel cannot take place in the cylinder
D.compression pressure will be too low to cause fuel ignition

單項(xiàng)選擇題

Misalignment of the drive shaft and propeller shaft flanges can be detected by using a dial indicator or （）

A.inside micrometer
B.feeler gauge and straight edge
C.adjustable trammel
D.sighting device

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