單項(xiàng)選擇題

The basic function of the centrifugal pump impeller is to （）.

A.directly increase the pressure of the liquid being pumped
B.directly increase the velocity of the liquid being pumped
C.convert the potential energy of the liquid to kinetic energy
D.separate air from the liquid being pumped

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單項(xiàng)選擇題

Excessive oil foaming in the crankcase of a refrigeration compressor can result in （）.

A.overheated compressor bearings
B.excess lube oil viscosity
C.carbon deposits on the compressor piston rings
D.wax crystals forming in the lubricant

單項(xiàng)選擇題

The centrifugal pump component responsible for converting the mechanical energy of the liquid being pumped, to that of kinetic energy is the （）.

A.electric motor
B.volute
C.impeller
D.diffusion nozzle

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The basic function of the centrifugal pump impeller is to （）.

你可能感興趣的試題

Excessive oil foaming in the crankcase of a refrigeration compressor can result in （）.

The centrifugal pump component responsible for converting the mechanical energy of the liquid being pumped, to that of kinetic energy is the （）.