A.catch plates
B.swash plates
C.cover plates
D.bedplates
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A.filter
B.hole
C.pollution
D.content
A.scaled
B.worn
C.deformed
D.rested
A.a heater
B.a pre-heater
C.an exhaust gas boiler
D.the coal burning boiler
A.be increased
B.be decreased
C.remain constant
D.either be increased or remain constant
A.the more
B.the higher
C.the lower
D.the highest
最新試題
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by （）.
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
The usual symptoms of cavitation in a centrifugal pump is （）.
Which of the following statements is correct concerning heat transfer?（）
A grease gun is generally used to lubricate a （）.
A pressure drop through the refrigerant liquid line may cause （）.
Thermostatic expansion valves can be adjusted for （）.
A salinity indicator is used to determine the （）.
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.