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Variable displacement pumps used in hydraulic applications can1. have variable flow rate2. consume less energy3. be operated with high accuracy for slow and rapid motion 4. generate more heat

A. 1 and 2
B. 3 and 4
C. 1, 2 and 3
D. all the above

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Electric motor has a speed of 1200 rpm and output rate of pump is 6 mL/rev. Calculate flow rate of pump in l/min

A. 6 l/min
B. 7.2 l/min
C. 5 l/min
D. none of the above

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Calculate the power absorbed by the pump if, it has a flow rate of 20 mL/rev and develops a maximum pressure of 70 bar, when electric motor runs at a speed of 1200 rpm.

A. 1.9 kW
B. 2.8 kW
C. 2.3 kW
D. none of the above

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Volumetric efficiency of the pump is the ratio of

A. theoretical flow rate to actual flow rate
B. actual flow rate to theoretical flow rate
C. actual fluid power to pump input power
D. none of the above

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The hydraulic cylinder that can realize the differential connection is ().

A. double rod hydraulic cylinder
B. single rod hydraulic cylinder
C. plunger type hydraulic cylinder
D. A + B + C

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Variable displacement pumps used in hydraulic applications can1. have variable flow rate2. consume less energy3. be operated with high accuracy for slow and rapid motion 4. generate more heat

A. 1 and 2 B. 3 and 4 C. 1, 2 and 3 D. all the above

Electric motor has a speed of 1200 rpm and output rate of pump is 6 mL/rev. Calculate flow rate of pump in l/min

Calculate the power absorbed by the pump if, it has a flow rate of 20 mL/rev and develops a maximum pressure of 70 bar, when electric motor runs at a speed of 1200 rpm.

Volumetric efficiency of the pump is the ratio of

The hydraulic cylinder that can realize the differential connection is ().

A. 1 and 2
B. 3 and 4
C. 1, 2 and 3
D. all the above