[单选题]

In a simple mechanical governor, the （）.

A . centrifugal force rotates the ball-head

B . flyweight centrifugal force is balanced by spring force

C . flyweight centrifugal force is balanced by hydraulic pressure

D . speeder spring alone actuates the fuel control rod

参考答案与解析：

相关试题

The governor of a generator engine is to

[单选题]The governor of a generator engine is to （）.A . make the engine stopB . regulate the timing of camshaftsC . make the rpm stabilize at any required valueD . make the engine run at nearly constant speed

  • 查看答案

    • The mechanical efficiency of an engine （

    [单选题]The mechanical efficiency of an engine （） because losses occur in the form of friction.A . is always less than 100%B . is always more than 100%C . is always equal to 90%D . is always less than 90%

  • 查看答案

    • The conclusion that mechanical efficienc

    [单选题]The conclusion that mechanical efficiency is always （） 100 percent is correct.A . small thanB . more thanC . little thanD . less tha

  • 查看答案

    • The governor had to _______ from office

    [单选题]The governor had to _______ from office because of the scandal.A． resignB． removeC． retreatD． retire

  • 查看答案

    • The ability of the governor to prevent f

    [单选题]The ability of the governor to prevent fluctuations in engine speed is termed （）.A . sensitivityB . stabilityC . promptnessD . speed droo

  • 查看答案

    • The most common contaminate of governor

    [单选题]The most common contaminate of governor hydraulic fluid is （）.A . moistureB . dirtC . acidD . air

  • 查看答案

    • A governor automatically controls engine

    [单选题]A governor automatically controls engine speed by regulating （）.A . fuel supplyB . firing orderC . engine loadD . oil level

  • 查看答案

    • Mechanical lubricators for diesel engine

    [单选题]Mechanical lubricators for diesel engine cylinders are usually small reciprocating pumps which are （）.A . operated manually once an hourB . operated until the engine has startedC . placed into operation only at maximum loadD . adjustable to meet lubr

  • 查看答案

    • On most diesel engines, the governor con

    [单选题]On most diesel engines, the governor controls the output speed by （）.A . controlling the amount of fuel injected into the cylindersB . varying the speed of the turbochargerC . adjusting the compression ratioD . changing the timing of the fuel injecti

  • 查看答案

    • （） are commonly used in mechanical-hydra

    [单选题]（） are commonly used in mechanical-hydraulic governor（调速器） to sense engine speeds.A . BulbsB . BulksC . FlyweightsD . Flywheel

  • 查看答案