题目内容

Acylinderhasaboreareaof300cm2,andthepistonmovesat180cm/min.Theflowrateintothepumpis

A. 16.7 L/min
B. 54L/min
C. 60 L/min
D. noneoftheabove

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Whichdimensiondecidesoutputforceofahydrauliccylinder?

A. cylinderlength
B. pistonroddiameter
C. strokelength
D. pistondiameter

Whichdimensiondecidesoutputforceofahydrauliccylinder?

A. cylinderinnerdiameter
B. cylinderouterdiameter
C. cylinderlength
D. noneoftheabove

Whichfactorshouldbeconsideredwhenselectingpistonroddiameterforhydrauliccylinder?

A. pistondiameter
B. strokelength
C. outputforce
D. alloftheabove

()是强军的必由之路。

A. 建设
B. 重组
C. 发展
D. 改革