题目内容

Whatistheadvantageofpistonpumps?

A. smoothandquietoperation
B. highoutputpressure
C. lowcostofproduction
D. alloftheabove

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Pistonpumpscanbedesignedasvariabledisplacementpumps.

A. 对
B. 错

Pistonpumpsarefixeddisplacementpumps.

A. 对
B. 错

Pistonpumpsarevariabledisplacementpumps.

A. 对
B. 错

Forabentaxispistonpump,theanglebetweencylinderblockaxisandpumpshaftaxisdeterminesdisplacement.

A. 对
B. 错