DCV's
Air Logic
Air Preparation
Pressure Concepts
Pneumatic Circuits
100
Cam-operated pneumatic valves are designed to function like __________.
Limit switches
100
For shifting, externally air-piloted pneumatic DCVs use __________.
Remote air pressure
100
A partially closed air filter can cause an actuator to __________.
Move slowly
100
What percentage of force should a pneumatic cylinder be able to exceed the maximum load?
25%
100
Pneumatic cylinders are powered by compressed air which is converted into __________ mechanical power.
Linear
200
__________ are internal shock absorbers that absorb the impact of an actuator's rod to slow it down.
Cushions
200
Detent
200
A pressure drop measured across a filter indicates a __________.
Dirty filter element
200
When a cylinder is retracting, pressure only acts on the __________ area.
Annular
200
The __________ of a DCV shifts to channel air to specific ports.
Spool
300
Two-way valves control flow rate in either direction by functioning as __________ valves.
On-off
300
Air pilot
300
A common element used in compressed air filters is __________.
Sintered bronze
300
Pneumatic leverage means that __________.
A small input force generates a large output force
300
Which position does the handle of the directional control valve need to move to in order to retract the cylinder?
The right
400
Cam-operated valves are commonly used in 2-speed circuits such as the __________ circuit.
Rapid traverse, slow-speed
400
A shuttle valve exhausts an air pilot of a DCV when __________.
Both inputs are vented
400
A __________ filter removes water and oil from the air stream by collecting oil and water into droplets and then draining them off.
Coalescing
400
Boyle's law says that if an air container's size reduces by one half, then the air pressure will __________.
Double
400
Single-acting cylinders are most commonly operated using a __________ DCV.
3/2
500
Roller-plunger type cam valves are available in 2, 3, and 5-ported designs with __________ positions.
Two
500
One way to seal-in air logic is to use a shuttle valve to hold pressure on a __________.
Pilot Line
500
The number 70 stamped on an air filter refers to __________.
The filter's micron rating
500
__________ measures the difference in pressure between one point and another within the system.
Delta P
500
Single-acting cylinders are used in applications where __________ helps force the rod to shift.
Gravity