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单项选择题
A.Ammeter and changeover switch
B.Speed governor device
C.Synchroscope
D.Wattmeter
单项选择题
A.Control panel
B.Paralleling panel
C.Load panel
D.Busbar
单项选择题
A.Overflow valve
B.Reducing valve
C.Balancing valve
D.Reducing valve or balancing valve
单项选择题
A.overflow valve
B.reducing valve
C.relief valve
D.sequence valve
单项选择题
A.overflow valve
B.reducing valve
C.relief valve
D.sequence valve
单项选择题
A.control the fluid flow through it
B.prevent the pressure before it over the specified valve
C.make the pressure after it steady
D.control the direction of oil flow
单项选择题
A.control the back pressure of return oil
B.lock the oil lines under some conditions
C.change the direction of oil flow
D.act as relief valve
单项选择题
A.direction of oil flow
B.back pressure of return oil
C.bypass of filter
D.high pressure overflow
单项选择题
A.Too much sludge accumulated in separator bowl
B.Diameter of gravity disc too large
C.High level tank lack of water
D.Oil input too rapidly
单项选择题
A.Oil temperature too high
B.Diameter of gravity disc too large
C.Oil temperature too low
D.High level tank out of water