单项选择题
What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）
A.Spark plug
B.Heat of compression
C.Carburetor
D.Glow plug
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相关考题
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If a diesel engine fails to start，one of the likely causes is （）
A.low compression temperature
B.low ambient air pressure
C.high lube oil pump pressure
D.high fuel oil booster pump pressure -
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Icreasing the exhaust valve tappet clearance of a diesel engine will result in the exhaust valve opening （）
A.later and closing earlier
B.later and closing later
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When the opening pressure of a diesel fuel injector is greater than that specified by the engine manufacturer，the （）
A.quantity of fuel injected is decreased
B.quantity of fuel injected will always be increased
C.start of injection is advanced
D.duration of injection will always be greater
