In which systems, spool of the servo valve is operated by a torque motor?
A. hydro-mechanical servo systems
B. electro-hydraulic servo systems
C. conventional servo valve
D. all the above
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What does servo mean in servo valve system?
A. it cannot receive a feedback but the desired output can be obtained
B. it cannot receive a feedback and the desired output cannot be obtained
C. it can receive a feedback and the desired output can be obtained
D. none of the above
In conventional valves, which component is used to move the spool?
A. torque motor
B. mechanical servo valve
C. solenoid
D. all the above
What is the advantage of DC solenoid coils?
A. DC solenoid coils have high rush in current
B. DC solenoid coils have constant level of current
C. DC solenoid coils have rating of 220 V DC
D. all the above
In which control valve energy consumption reduces as load decreases?
A. conventional direction control valve
B. proportional direction control valve
C. both a and b
D. none of the above
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