A.vaporizes in the condenser
B.reaches the compressor through the suction line
C.flashes in the liquid line
D.condenses in the receiver
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A.heat
B.power
C.horsepower
D.foot-pound
A.worn bearings and piston pins
B.slugging due to flooding back
C.too much oil in circulation
D.All of the above
A.superheated
B.super-cooled
C.at or below the dew point
D.All of the above
A.open the steam line mot valve
B.drain the steam cylinder
C.close the steam cylinder drains
D.open the liquid cylinder drains
A.rudder will respond sluggishly
B.hydraulic rams will over-speed
C.sight glass will show bubbles
D.ram relief valves will lift
最新試題
The control mode in which the final control element is moved from one of two flexed positions to the other is known as （）.
If the suction pressure at the refrigeration compressor is below normal, the cause 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 （）.
The general purpose of a heat exchanger is to （）.
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.
The rate of heat transfer from a hot region to a cold region is affected most by the （）.
The output volume of a positive fixed displacement pump can be changed only by （）.
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）
A pressure drop through the refrigerant liquid line may cause （）.
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）