A.the control rod
B.the hunting gear
C.the floating ring
D.the tiller arm
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A.air cooler
B.economizer
C.injector
D.air blower
A.to pump off
B.being pumped
C.pumping out
D.it pumping out
A.reciprocating pump
B.gear pump
C.centrifugal pump
D.vane pump
A.reciprocating
B.hydraulic
C.turbine
D.vane
A.a level controller
B.a temperature switch
C.a pressure switch
D.a floating ball
最新試題
The major source of chemical contaminants in hydraulic fluid is （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
A salinity indicator is used to determine the （）.
If you are given the job of adding hydraulic fluid to a mooring winch, and are not certain as to the type of fluid to use, you should （）.
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）
The usual symptoms of cavitation in a centrifugal pump is （）.
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.
The control mode in which the final control element is moved from one of two flexed positions to the other is known as （）.
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.
When the steering gear is in operation, you should （）.