Question 1

Which of the following is NOT true about hydraulic valves?

1. Directional control valves determine the path of a fluid in agiven circuit
2. Pressure reducing valve is another name for pressure reliefvalve
3. A pressure relief valve is used to limits the maximum pressurein a hydraulic system
4. Pilot check valves can permit flow in the normally blockedopposite direction
5. All of the above

Question 2

Which of the following is the purpose of fail-safe circuits?

1. Fail-safe circuits are designed to provide overload protectionfor system components
2. Fail-safe circuits are designed to protect electric motorsagainst voltage surge
3. Fail-safe circuits are designed to maintain constant current inelectric motor coils
4. A, B, and C
5. None of the above

Question 3

For the circuit shown, which ofthe following in true? Explain your answer.

1. As cylinder 2 extends, cylinder 1 does not move
2. As cylinder 2 extends, cylinder 1 extends
3. As cylinder 2 extends, cylinder 1 retracts
4. Cylinder 2 can?t extend in any of the 3 positions of theDCV
5. None of the above

Transcribed Image Text:

Cylinder 1 Cylinder 2 Cylinder 1 Cylinder 2