A.dehydrated
B.purged
C.plugged
D.evacuated
您可能感興趣的試卷
你可能感興趣的試題
A.combustion control air system
B.supply air system
C.ships service air system
D.low pressure deck air system
A.dry bulb temperature
B.wet bulb temperature
C.saturation temperature
D.water vapor superheat
A.The follow-up gear
B.The rudder angle indicator
C.The synchronous electric transmitter
D.A rudder angle limit switch
A.apparent slip
B.tree slip
C.pitch
D.propulsive efficiency
A.two or more impellers housed together in one casing and mounted on a single shaft
B.a single stepped impeller mounted in a progressively staged casing
C.a large radial clearance between the impeller and casing to prevent overheating due to
D.an increase in the discharge velocity of the liquid with a corresponding decrease in pressure through the stages
最新試題
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 （）.
A grease gun is generally used to lubricate a （）.
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
The general purpose of a heat exchanger is to （）.
The rate of heat transfer from a hot region to a cold region is affected most by the （）.
One cause of high head pressure occurring in a refrigeration system can be （）.
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by （）.
Low compressor head pressure in a refrigeration system can be caused by（）.
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）