A.by turning the pump plunger
B.by vary the fuel valve spring force
C.by no means by controlling the governor
D.by enlarging or diminishing the injection hole
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A.counterbalance the crank throws on the crankshaft
B.keep the engine running smoothly between power stroke
C.provide a belt-driving surface for the operation of auxiliary machinery
D.prevent the engine from overspeeding
A.the cross-head
B.the pumps
C.the shell
D.the load
A.gear
B.nonpositive displacement
C.positive displacement
D.rotary
A.the pump cylinder
B.the pump cam
C.the pump plunger
D.the pump miler
A.wheel
B.crankshaft
C.running gear
D.cam
A.charging
B.supercharging
C.starting
D.scavenging
A.behind
B.far from
C.adjacent to
D.in front of
A.power output
B.friction and wear
C.indicated pressure
D.rated horsepower
A.viscosity
B.density
C.velocity
D.electricity
A.higher
B.lower
C.low
D.high
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Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.
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