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單項(xiàng)選擇題

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

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單項(xiàng)選擇題

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

單項(xiàng)選擇題

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