A.physical state
B.temperature
C.atmospheric pressure
D.sensible pressure
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A.The blow down valve
B.The scum valve
C.The air release cock
D.The soot-blower
A.an diesel oil heater
B.a waste heat boiler
C.a fresh water generator
D.all the above
A.safety valve
B.blow down valve
C.scum valve
D.feed check valve
A.descriptions
B.discrepancies
C.different
D.deflections
A.completed
B.carried out
C.cleaned
D.steamed
最新試題
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by （）.
A pressure drop through the refrigerant liquid line may cause （）.
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will （）.
A grease gun is generally used to lubricate a （）.
The usual symptoms of cavitation in a centrifugal pump is （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.
An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.
The output volume of a positive fixed displacement pump can be changed only by （）.
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.