When is a pressure reducing valve used?
A. it is used when higher pressure than system pressure is required
B. it is used when lower pressure than system pressure is required
C. when absolutely zero pressure is required
D. all the above
查看答案
Which of the following statements are true for throttle valve?1. Reverse flow of fluid is not possible2. Input pressure for a throttle valve is more than output pressure3. The actuator speed can be reduced by a throttle valve4. Correct flow control valve for a particular application can be selected on the basis of pressure drop specified
A. 1, 2 and 3
B. 1, 3 and 4
C. 2, 3 and 4
D. all the above
What is the function of a flow control valve?
A. flow control valve changes the direction of oil flow
B. flow control valve can adjust the flow rate of hydraulic oil
C. both a and b
D. none of the above
What is the function of sequence valve used in hydraulic circuits?
A. sequence valves are used to perform number of operations one after the other after the set pressure is reached
B. sequence valves are used to perform number of operations continuously before the set pressure is reached
C. sequence valves after reaching set pressure oil is flown to the tank
D. all the above
Which stage in two stage direction control valve is solenoid operated?
A. main stage direction control valve
B. pilot stage direction control valve
C. both stages in two stage direction control are solenoid operated
D. none of the above
微信支付 
支付宝支付