单选题A diesel engine will lose power if fuel injection occurs too late in the cycle, because the（）A fuel droplets will burn as they leave the fuel injectorB fuel will not be properly atomized in the cylinderC maximum expansion of the burned fuel cannot take

_______can be a direct cause of faulty operation of diesel engine fuel injection nozzles.

A.Excessive fuel nozzle holder cooling

B.Sediment in the fuel supply

C.Distortion of the fuel spray pattern

D.Improper atomization of the fuel

If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will_________.

A.backfire through the air intakes

B.develop less power under load

C.have high firing pressures

D.lift its cylinder relief valves

One cause of diesel engine surging can be a result of ______.

A.injection pump plungers stuck or worn

B.low compression

C.solenoid stuck open

D.fuel tank too full

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