Quiz on Chapter 14: Sequence Valves and Reducing Valves

1. An air line regulator is:

1. normally open
2. normally closed
3. normally neutral

2. An air sequence valve is usually a:

1. pilot-operated 3-way valve
2. pilot-operated 4-way valve
3. pilot-operated 5-way valve

3. Hydraulic sequence valves are normally used in conjunction with:

1. multi-cylinder circuits with flow control valves
2. multi-cylinder circuits and a single directional control valve
3. multi-cylinder circuits in place of a relief valve

4. Hydraulic kick-down sequence valves :

1. open at set pressure and maintain inlet pressure
2. open at set pressure and drop inlet pressure to outlet port pressure
3. close at set pressure

5. Internally piloted counterbalance valves’ main advantage is:

1. jerky action as the load is lowered
2. they never need to be re-adjusted at load change
3. smooth, controlled extend action of the load

6. Externally piloted counterbalance valves:

1. drop all backpressure at load contact
2. must be adjusted for load changes
3. have very smooth and controlled action during extension

7. Hydraulic reducing valves maintain pressure by:

1. opening when reaching set pressure
2. closing when reaching set pressure
3. sending fluid to tank at set pressure

8. Hydraulic reducing valves:

1. never need a bypass check valve
2. always need a bypass check valve
3. need a bypass check valve when flow must be reversed

9. Hydraulic reducing relieving valves:

1. send pump flow to tank just above set pressure
2. send actuator flow to tank at pressure just above set pressure
3. never send any system flow to tank

10. This symbol is for a: sequence valve counterbalance valve . reducing valve