单项选择题

One remedy for a high firing pressure, in addition to a high exhaust temperature in one cylinder of a diesel engine, is to （）

A.increase scavenge air pressure
B.reduce fuel booster pump pressure
C.adjust the fuel rack
D.retard fuel injector timing

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单项选择题

What is the best way of stopping an over-speeding diesel engine?（）

A.Disconnect the battery cables from the starting motor
B.Drain the hydraulic fluid from the governor sump
C.Block the flow of cooling air to the radiator
D.Secure the fuel supply and block the air intake

单项选择题

The efficient burning of fuel in a diesel engine is dependent upon the （）

A.temperature of compression
B.atomization of the fuel
C.penetration of the fuel
D.all of the above

单项选择题

Persistent knocking of one cylinder of a diesel engine ceases when the fuel supply to that cylinder is securedThis problem may be a result of （）

A.low loading of that cylinder
B.faulty combustion in that cylinder
C.sluggish piston ring action
D.excessive piston cooling