A.be increased
B.be decreased
C.remain constant
D.either be increased or remain constant
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A.the more
B.the higher
C.the lower
D.the highest
A.monkey
B.donkey
C.waste heat
D.main
A.fire
B.water wall
C.generating
D.down comer
A.tightened up
B.sealed up
C.opened up
D.unscrewed
A.use
B.release
C.protect
D.effect
最新試題
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.
The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?（）
Which of the listed pumps is NOT a positive displacement pump?（）
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.
The output volume of a positive fixed displacement pump can be changed only by （）.
An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.
A pressure drop through the refrigerant liquid line may cause （）.
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably 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 （）.