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单选题
The effective pump stroke of an individual port-and-helix fuel injection pump is determined by the （）
A
fuel delivery pressure
B
pump plunger diameter
C
plunger control rack position
D
total pump stroke
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考题
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考题
单选题The effective stroke of a constant-stroke, individual, fuel injection pump is varied by the （）.A
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delivery valveC
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考题
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考题
单选题An increase in the fuel injection pump discharge pressure can be caused by a/an （）A
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考题
单选题As the designated rudder angle is being achieved, as a result of the original command input, the steering gear follow-up mechanism is（）A
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考题
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考题
单选题When the follower is on the base circle of the cam, the pump plunger is at the （） of its stroke.A
topB
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bottomD
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考题
单选题The average pressure exerted on piston during each power stroke is termed（）A
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mean effective pressureC
exhaust back pressureD
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