單項(xiàng)選擇題

If fuel injection to a four-stroke/cycle diesel engine begins earlier than designed, ignition may be delayed because the （）.

A.cylinder compression pressure may not be high enough
B.cylinder compression temperature may be too high
C.fuel oil injection pressure may not be high enough
D.scavenge and purge process is incomplete

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單項(xiàng)選擇題

Any increase in the exhaust back pressure of a four-stroke/cycle diesel engine will （）.

A.reduce engine horsepower output
B.aid in silencing the exhaust noise
C.increase the mean effective pressure
D.contribute to effective cylinder scavenging

單項(xiàng)選擇題

High exhaust temperature and black smoke exhausting from an auxiliary diesel engine can be caused by （）.

A.engine overload
B.low combustion temperature
C.plugged fuel nozzle holes
D.excessive compression pressure

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If fuel injection to a four-stroke/cycle diesel engine begins earlier than designed, ignition may be delayed because the （）.

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Any increase in the exhaust back pressure of a four-stroke/cycle diesel engine will （）.

High exhaust temperature and black smoke exhausting from an auxiliary diesel engine can be caused by （）.