A.in series
B.in parallel
C.assembled
D.together
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A.gasket
B.packing
C.washer
D.spring
A.Wear
B.Contaminating
C.Coalescence
D.Coarse separating
A.non-pulsating
B.pulsating
C.positive
D.non-positive
A.injection valve
B.relief valve
C.discharge valve
D.inlet filter
A.gear
B.vane
C.screw
D.centrifugal
最新試題
The general purpose of a heat exchanger is to （）.
A grease gun is generally used to lubricate a （）.
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.
The usual symptoms of cavitation in a centrifugal pump is （）.
One cause of high head pressure occurring in a refrigeration system can be （）.
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）
The major source of chemical contaminants in hydraulic fluid is （）.
When the steering gear is in operation, you should （）.
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.