單項選擇題

Why are removable sleeves installed on centrifugal pump shafts?（）

A.They make it easier to replace the pump shaft packing
B.They can be economically replaced as they wear out
C.They can be removed when it is necessary to lighten the weight of the pump
D.They increase the strength of the shaft

你可能感興趣的試題

單項選擇題

In reference to air conditioning, when air attains the maximum amount of moisture it can hold at a specific temperature, it is said to be （）.

A.superheated
B.saturated
C.condensed
D.convected

單項選擇題

An axial軸向 piston pump differs from a radial piston pump as the pistons of an axial piston pump are positioned （）.

A.radially from the shaft
B.parallel to each other and to the shaft
C.parallel to each other but at a right angle to the shaft
D.at an angle to each other and to the shaft

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Why are removable sleeves installed on centrifugal pump shafts?（）

你可能感興趣的試題

In reference to air conditioning, when air attains the maximum amount of moisture it can hold at a specific temperature, it is said to be （）.

An axial軸向 piston pump differs from a radial piston pump as the pistons of an axial piston pump are positioned （）.