The speed of the camshaft in a two-stroke/cycle diesel engine, running at 950 RPM, is （）.

[单选题]The effective stroke of a constant-stroke, individual, fuel injection pump is varied by the （）.A . control rackB . delivery valveC . governor speedD . plunger crossbar

[单选题]（） for the camshaft gear train is taken from a spur gear which for a six cylinder engine is at the coupling end.A . The driven gearB . The driveC . The greaseD . The lubricating oil

[单选题]当出现“SPEED，SPEED，SPEED”的语音警告时表示：（）A .速度超限B .当前推力不足以通过俯仰操纵来恢复正常飞行C .速度偏离选择或管理的速度

[单选题]In a four-stroke engines the camshaft rotates at （）.A . half the engine rotational speedB . twice the engine rotational speedC . the engine rotational speedD . four times the engine rotational speed

[单选题]In a four-stroke engine the camshaft rotates at （）.A . half the engine speedB . twice the engine speedC . the engine speedD . four times the engine speed

[单选题]The camshaft on a four-stroke/cycle diesel engine provides a means to operate the （）.A . fuel injectorsB . exhaust valvesC . intake valvesD . all of the above

[单选题]Propeller pitch speed minus ship speed divided by the propeller pitch speed is termedA．apparent slipB．true slipC．pitchD．propulsive efficiency

[单选题]Propeller pitch speed minus ship speed divided by the propeller pitch speed is termed ___.A．apparent slipB．true slipC．pitchD．propulsive efficiency

[单选题]What is the speed of the crankshaft in a four-stroke/cycle engine when the camshaft is turning at 750 rpm?（）A . 375 RPMB . 500 RPMC . 750 RPMD . 1500 RPM

[单选题]Passage TwoThere are two factors which determine an individual's intelligence. The first is the sort of brain he is born with. Human brains differ considerably, some being more capable than others. But no matter how good a brain he has to begin with