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Physics
Professional Development
Basic Pneumatic Speed Control Circuits
13 questions
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- 1. Multiple Choice
A flow control valve is a combination of a ___
Flow meter and check valve
DCV and check valve
Needle valve and check valve
Needle valve and restrictor valve
- 2. Multiple Choice
If the load on the actuator changes, the pressure required to move the load will ___
Also change
Remain the same
Compensate the DCV
Cause the vane to stall
- 3. Multiple Choice
A meter-in flow control circuit controls the fluid ___.
Entering the actuator
Leaving the actuator
Allowed in the room
Based on temperature changes
- 4. Multiple Choice
Which of the following is not a part of a flow control valve?
Body
Vane
Adjustment Screw
Check Valve
- 5. Multiple Choice
Exhaust port speed control works by creating ___ to control the retract speed of a single-acting cylinder
Leaks
Exhaust
Ozone
Back Pressure
- 6. Multiple Choice
An independent speed control circuit may be needed with a double-acting cylinder because ___
Two speeds are needed during the retract
Aiding loads are present
Equal extend and retract speeds are needed
The supply pressure varies
- 7. Multiple Choice
A needle valve controls air flow rate by causing a(n) ___
Restriction
Exhaust
Leak
Escape
- 8. Multiple Choice
Another name for the rotameter flow meter is ___.
Bourdon tube
Variable orifice
Vacuum tube
Needle valve
- 9. Multiple Choice
The way to read a rotameter is to read the scale from the ___.
Bottom of the ball
Center of the ball
Top of the ball
None of the answers are correct
- 10. Multiple Choice
A needle valve is often used in pneumatic circuits ___.
To control actuator speed
To reduce atmospheric pressure
To control the position of the vane
To measure air flow
- 11. Multiple Choice
A meter-out flow control circuit controls the speed of an actuator by
Applying back pressure to the actuator
Restricting the air flow to the actuator
Exhausting excess air
Reducing the supply pressure
Applying back pressure to the actuatro
Restricting the air flow to the actuator
Exhausting excess air
Reducing the supply pressure
- 12. Multiple Choice
The flow rate of air is the amount of air that passes through a system ___.
In a certain amount of time
At a give temperature
And is not returned to atmosphere
Before the compressor is started
- 13. Multiple Choice
___ port speed control affects the speed of an actuator in both direction
Bi-directional
Exhaust
DCV
Pressure
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