题目内容

In a telescopic cylinder, as the number of stages increase ()

A. diameter of piston rod also increases
B. diameter of piston rod decreases
C. diameter of the piston rod remains the same
D. none of the above

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Which of the following statements is true for standard hydraulic cylinder and a telescopic cylinder?

A. telescopic and standard cylinders give same stroke length
B. telescopic cylinders give lesser stroke length than standard cylinder
C. telescopic cylinders give greater stroke length than standard cylinder
D. none of the above

A cylinder displaces a 14 kN load at 0.85 m/s. If hydraulic fluid enters the cylinder at a rate of 45 mL/min and at a pressure of 40 MPa, what is the total efficiency of the system?()

A. 22%
B. 40%
C. 35%
D. 63%

A cylinder displaces a 13 kN load at 0.85 m/s. If hydraulic fluid enters the cylinder at a rate of 45 L/min and at a pressure of 40 MPa, what is the total efficiency of the system?()

A. 25%
B. 42%
C. 63%
D. 37%

The total efficiency of a hydraulic motor is usually equal to ().

A. volumetric efficiency × mechanical efficiency
B. volumetric efficiency × hydraulic efficiency
C. hydraulic efficiency × mechanical efficiency
D. volumetric efficiency × mechanical efficiency × hydraulic efficiency

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