單項選擇題

If you increase the clearance between a valve stem and rocker arm, which of the listed condition will occur?（）

A.valve will open later
B.valves will close later
C.amount of fuel injected will be increased
D.amount of fuel injected will be decreased

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單項選擇題

A drop in compression pressure in one cylinder of a diesel engine can be caused by（）

A.a leaking fuel injection nozzle
B.a clogged air filter
C.early fuel injection
D.burned valves

單項選擇題

If a four-stroke/cycle diesel engine is started by injecting air into the cylinder, the pistons receiving the charge of starting air must be（）

A.on the power stroke
B.on the exhaust stroke
C.at the end of the power stroke
D.at the start of the intake stroke

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