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
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
In a certain hydraulic equipment, it is necessary to use a hydraulic cylinder with a long working stroke. In this case, what type of cylinder should choose?
A. Single piston rod hydraulic cylinder
B. Double piston rod hydraulic cylinder
C. Plunger hydraulic cylinder
D. Telescopic hydraulic cylinder
In general, when the single rod cylinder retracts rapidly by differential connection ()
A. the oil is charged into the rod side of the cylinder and discharged from the piston side.
B. the oil is charged into the piston side of the cylinder and discharged from the rod side.
C. the oil is input to both sides of the cylinder
D. none of above
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