單項(xiàng)選擇題The required amount in the change of speed necessary before a governor will make a corrective movement is known as ().

A.speed droop
B.sensitivity
C.stability
D.promptness


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1.單項(xiàng)選擇題Turbulence in a diesel engine cylinder is of major importance in providing ().

A.proper fuel metering
B.complete fuel/air mixing
C.minimal fuel penetration
D.proper fuel timing

2.單項(xiàng)選擇題For a given fuel, a change in the compression ratio will affect the ignition lag by which of the listed means?()

A.An increase in compression ratio will increase the ignition lag
B.An increase in compression ratio will decrease the ignition lag
C.A decrease in compression ratio will decrease the ignition lag
D.A decrease in ignition lag will increase the compression ratio

4.單項(xiàng)選擇題In a diesel engine, an extremely leaking exhaust valve can cause ().

A.misfiring
B.pre-ignition
C.interrupted scavenging
D.reduced scavenging

5.單項(xiàng)選擇題Diesel engine exhaust temperatures may be used to indicate ().

A.leaking exhaust valves
B.an overloaded cylinder
C.a clogged injector nozzle
D.all of the above