单项选择题
The satisfactory operation of diesel engine exhaust valves usually depends on（）
A.the proper back pressure
B.the cooling water temperature
C.correct timing and proper seating
D.accurate metering and the exhaust temperature
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相关考题
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单项选择题
If an auxiliary diesel engine frequently stalls, the trouble may be caused by （）
A.low exhaust back pressure
B.air in the fuel system
C.gasket blow-by or leakage
D.incorrect assembly of idler springs -
单项选择题
A diesel engine cranks properly during starting but immediately stallsWhich of the following systems is most likely at fault?（）
A.Hydraulic starting
B.Electric starting
C.Ignition
D.Fuel -
单项选择题
The exhaust gases in a supercharged two-stroke/cycle diesel engine are expelled from the cylinder by （）
A.pumping action of the piston
B.pressure of the fuel charge
C.vacuum developed in the manifold
D.pressure of the fresh air charge
