题目内容

If the remote control port of pilot-operated pressre relief valve is connected back to the tank, what would happenr? ()

A. there is no overflow.
B. the inlet pressure is infinite;
C. the inlet pressure increases with the increase of load;
D. the inlet pressure cannot be adjusted.

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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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A. direction of movement;
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A. electromagnetic
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