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单选题
Adjustments to the compensating needle valve in a hydraulic governor should be made with the engine at （）
A
maximum power at a normal load
B
maximum power and load under normal conditions
C
half speed and normal temperature
D
normal operating temperature without a load
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单选题What type of valve is used to direct the flow of hydraulic fluid?（）A
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单选题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 adjustedB
compensating needle valve should be opened fully compensatingC
needle valve should be adjusted to stabilize operationD
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