單項(xiàng)選擇題

An increase in the air inlet manifold pressure of a diesel engine will result in a/an （）.

A.decrease in maximum cylinder pressure
B.increase in ignition lag
C.decrease in fuel consumption per horsepower-hour
D.decrease in exhaust manifold pressure

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單項(xiàng)選擇題

The overspeeding of the diesel engine driving an electric generator could cause （）.

A.low voltage trip to trip
B.reverse power trip to trip
C.damage to windings
D.excessive exhaust temperatures

單項(xiàng)選擇題

During the fuel injection period, fuel pressure must exceed cylinder gas pressure to （）.

A.ensure penetration and distribution of the fuel in the combustion chamber
B.ensure the needle valve is flushed clean during each injection
C.prevent combustion gas blowback into the open needle valve
D.prevent reflected pressure waves when the needle valve closes

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An increase in the air inlet manifold pressure of a diesel engine will result in a/an （）.

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The overspeeding of the diesel engine driving an electric generator could cause （）.

During the fuel injection period, fuel pressure must exceed cylinder gas pressure to （）.