單項(xiàng)選擇題

The effective stroke of a constant-stroke, individual, fuel injection pump is varied by the （）.

A.control rack
B.delivery valve
C.governor speed
D.plunger crossbar

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單項(xiàng)選擇題

The ability of a fuel particle to travel into the combustion chamber before burning is called （）.

A.penetration
B.permanence
C.turbulence
D.atomization

單項(xiàng)選擇題

Proper atomization of fuel in diesel engine combustion chambers will （）.

A.affect the injection pressure
B.improve combustion
C.reduce compression pressure
D.decrease power output

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