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單項(xiàng)選擇題

The rate of fuel injection in a diesel engine cylinder depends primarily on （）.

A.the size of the holes in the fuel nozzle
B.timing of the pump
C.supply pressure to the pump
D.shape of the combustion chamber

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單項(xiàng)選擇題

The camshaft on a four-stroke/cycle diesel engine provides a means to operate the （）.

A.fuel injectors
B.exhaust valves
C.intake valves
D.all of the above

單項(xiàng)選擇題

A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the （）
(1) scavenging air is cooling the exhaust gases
(2) exhaust cycle time is longer

A.(1) only
B.(2) only
C.both (1) and (2)
D.neither (1) nor (2)

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