单项选择题
The major cause of trouble in a mechanical-hydraulic governor is contamination of the hydraulic fluid by （）
A.dirt
B.fuel oil
C.governor cooling water
D.fuel oil tars
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相关考题
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单项选择题
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
A.Sensitivity
B.Power
C.Speed droop
D.Compensation -
单项选择题
A faulty thermostatic bypass valve, in a diesel engine cooling system, can result in （）
A.excessive time required for warming-up
B.excessive freshwater corrosion
C.scale formation on the saltwater side
D.saltwater mixing with the freshwater -
单项选择题
Movement of the pump control rack in a fuel injection system using individual plunger-type pumps （）
A.changes the position of the fuel inlet ports
B.changes the length of the pump stroke
C.varies the quantity of fuel delivered
D.varies the compression of the delivery valve spring
