單項(xiàng)選擇題

After installing a new hydraulic pump in a system, what special attention should be given to the hydraulic system?（）

A.The relief valves in the system should be readjusted
B.The filters and strainers should be checked frequently
C.All system pressure should be readjusted
D.The system should be drained and renewed with a fluid of different operating characteristics

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單項(xiàng)選擇題

For safe storage, the maximum allowable temperature to which refrigerant bottles should be exposed is （）.

A.100℃
B.125℃
C.150℃
D.175℃

單項(xiàng)選擇題

One of the main functions of wearing rings, as used in a centrifugal pump, is to （）.

A.maintain radial alignment between the pump impeller and casing
B.absorb all impeller shaft end thrust
C.prevent water leakage to the atmosphere
D.prevent wear of the pump casing and/or impeller

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After installing a new hydraulic pump in a system, what special attention should be given to the hydraulic system?（）

你可能感興趣的試題

For safe storage, the maximum allowable temperature to which refrigerant bottles should be exposed is （）.

One of the main functions of wearing rings, as used in a centrifugal pump, is to （）.

99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精