单项选择题

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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单项选择题

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

单项选择题

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
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A naturally aspirated diesel engine at full throttle will have an intake manifold pressure （）

A.slightly less than atmospheric pressure
B.approximately equal to exhaust manifold pressure at all times
C.that is widely fluctuating constantly
D.decreasing as engine load increases