Quiz on Chapter 10: Directional Control Valves

1. A check valve is a/an:

1. directional control valve
2. counterbalance valve
3. reducing valve

2. Pilot-operated check valves have ___________flow in one direction.

1. increased
2. controlled
3. decreased

3. Pre-fill valves have ___________ flow at low pressure drop.

1. higher
2. less
3. the same

4. Pre-fill valves are used to:

1. make small cylinders move faster
2. give large cylinders more force
3. fill and empty large cylinders quickly

5. A plain check valve can be used as:

1. pilot-operated relief valves
2. direct-acting relief valves
3. either type relief valve

6. A 2-way valve has:

1. one working port
2. two working ports
3. three working ports

7. A 2-way valve can have:

1. two positions
2. three positions
3. four positions

8. One 3-way valve can power a double acting cylinder in both directions.

1. True
2. False

9. A 4-way valve has:

1. two working ports
2. three working ports
3. four working ports

10. A 5-way valve is normally used in:

1. air circuits
2. hydraulic circuits
3. both air and hydraulic circuits

11. Direct solenoid-operated valves:

1. are only DC current activated
2. are only AC current activated
3. operate off either AC or DC current

12. Solenoid pilot-operated valves must have at least___________pilot pressure minimum.

1. 25 to 50 psi
2. 50 to 75 psi
3. 75 to 100 psi

13. The X port on a solenoid pilot-operated valve is for external___________.

1. drain
2. pilot pressure
3. either drain or pilot pressure

14. The Y port on a solenoid pilot-operated valve is for external:

1. drain
2. pilot pressure
3. either drain or pilot pressure

15. Stroke limiters on the working spool of a solenoid pilot-operated valve can:

1. slow spool travel
2. speed up spool travel
3. control actuator speed

16. A D10-size valve can flow up to:

1. 80 gpm
2. 90 gpm
3. 100 gpm