Basic Pneumatic Speed Control Circuits

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

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

A meter-in flow control circuit controls the fluid ___.

• Entering the actuator

• Leaving the actuator

• Allowed in the room

• Based on temperature changes

Which of the following is not a part of a flow control valve?

• Body

• Vane

• Adjustment Screw

• Check Valve

Exhaust port speed control works by creating ___ to control the retract speed of a single-acting cylinder

• Leaks

• Exhaust

• Ozone

• Back Pressure

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

A needle valve controls air flow rate by causing a(n) ___

• Restriction

• Exhaust

• Leak

• Escape

Another name for the rotameter flow meter is ___.

• Bourdon tube

• Variable orifice

• Vacuum tube

• Needle valve

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

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

Tags

NGSS.MS-PS2-2