單項(xiàng)選擇題

Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.

A.a shortened ignition delay period
B.a lean fuel/air mixture
C.excess fuel in the combustion chamber
D.rapid vaporization of injected fuel droplets

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單項(xiàng)選擇題

Diesel engine control can be obtained by the bridge （）.

A.at any time
B.only after the engine room control station is switched to “bridge control”
C.whenever the secondary station is switched to "bridge control"
D.with the approval of the chief engineer only

單項(xiàng)選擇題

To determine if the lube oil filter elements need changing, （）.

A.open the filter and inspect the elements
B.check the lube oil pump discharge pressure
C.check the lube oil header pressure
D.check the pressure drop across the filter