In reducing engine speed to an efficient propeller speed by the use of reduction gears, _______.

A．speed and torque are both reduced

B．speed is reduced and torque remains unchanged

C．speed is reduced and torque is increased

D．speed is sometimes unchanged while torque is increased

[单选题]The minimum speed an engine must attain before ignition can occur depends upon （）.A . the type and size of the engineB . the condition of the engineC . ambient temperatureD . all of the above

[单选题]As to the low speed diesel engine, if you want to change the coolant flow for a certain cylinder, you can regulate （）.A . the inlet valveB . the outlet valveC . both the inlet valve and the outlet valveD . the pump inlet valve

[填空题] Engine speed sensor---G28 No Singna1的中文意思是（）。

On a medium-speed main propulsion diesel engine, the crank-pin or crank journalb

[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

[名词解释] 还原糖（reducing sugar）

[单选题]Saving or reducing expenditure in business is （） A . Save money B . Increase costC . cost planningD . cost control

[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]Such an engine frame helps （） the engine and so protect the bearings from the deformation forces transmitted via the ships double bottom.A . to stiffenB . to softenC . to loosenD . to wear