单项选择题

Diesel engines driving alternators operating in parallel must maintain set frequency regardless of load changesThe governor characteristic used to accomplish this is known as （）

A.actuation
B.sensitivity
C.compensation
D.thrust shaft

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单项选择题

An individual injection pump is designed for variable beginning and constant ending of injectionFor diesel engines operating at constant speeds, the start of injection will（）

A.advance as the load increases
B.retard as the load increase
C.remain unchanged regardless
D.always occur at top dead center

单项选择题

The purpose of the compensating adjustment used in a diesel engine hydraulic governor is to （）

A.compensate for low oil level
B.increase governor promptness
C.prevent governor hunting
D.limit engine load

单项选择题

If a hydraulic governor has been refilled with oil, the engine should be operated until it reaches normal temperaturethen the air should be purged, and the（）

A.rack position should be adjusted
B.compensating needle valve should be opened fully compensating
C.needle valve should be adjusted to stabilize operation
D.speed limiting device should be adjusted