A.worn bearings and piston pins
B.slugging due to flooding back
C.too much oil in circulation
D.All of the above
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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
A.continuous running of the compressor
B.high suction pressure
C.high discharge pressure
D.short cycling of the compressor on the water failure switch
A.the cooling effect of the condensate reduces the compressors efficiency
B.a danger of explosion exists whenever water is present in a compressor
C.water causes erratic operation of pneumatic components
D.the volumetric capacity of the first stage is reduced if water remains
最新試題
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.
The control mode in which the final control element is moved from one of two flexed positions to the other is known as （）.
Low compressor head pressure in a refrigeration system can be caused by（）.
The rate of heat transfer from a hot region to a cold region is affected most by the （）.
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
The usual symptoms of cavitation in a centrifugal pump is （）.
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by （）.