题目内容

The pressure relief valve is generally installed at the outlet of _________ to stabilize the pressure and safety. ()

A. hydraulic cylinder;
B. hydraulic pump;
C. directional control valve;
D. oil tank.

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The sequence valve acts as ___________ in the hydraulic system.()

A. pressure stabilization;
B. decompression;
C. pressure switch;
D. safety protection.

The flow control valve is used to control the flow of the hydraulic system, so as to control the actuator's ().

A. direction of movement;
B. speed
C. pressure
D. output force

In the large flow hydraulic system, what type of directional control valve should be used? ()

A. electromagnetic
B. electro-hydraulic
C. manual
D. mechanical

When overflow exists in the fixed pressure relief valve, it can maintained____ stable. ()

A. inlet pressure of the valve
B. outlet pressure of the valve
C. inlet and outlet pressure of the pump
D. the actual flow of the pump

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