Pneumatics Flashcards
What are the 5 basic elements of a pneumatic circuit?
- DCV
- conductors
- power source
- pressure switch
- actuator
What does a graphic symbol reveal about a fluid component?
The function
What is the purpose of unloader vlvs on a compressor
It allows the compressor to start with no load
What component in a circuit keeps constant pressure on the valve
Regulator
What components are in the trio unit
A filter, regulator and a lubricator
What is the largest malfunction in a pneumatic system?
Poor maintenance
A multistage compressor is designed to do what?
Compress air in stages for higher pressure
What air tank component tells the compressor to start and stop?
Pressure switch
What pneumatic component supplies a sufficient amount of air at a desired pressure?
Compressor
T or F
When hot air cools, it’s ability to carry water vapor decreases.
True
T or F
A single acting cylinder uses system pressure moving in a linear and reciprocating motion (forward and reverse direction).
False
T or F
A check valve is a directional control valve controlling a single flow path on or off.
True
T or F
A silencer can be installed to control noise of releasing air.
True
T or F
A regulator is a type of flow control valve that is normally closed.
False
T or F
A flow control valve uses metered flow out of actuator but not in.
True
T or F
A ball valve closes multiple flow paths.
False
T or F
Safety vlvs are normally closed vlvs.
True
T or F
When working on a circuit, air pressure should not be relieved before.
False
T or F
The working air pressure should be marked for operators.
True
Piping that consists of central piping and small feeder lines.
Grid system
Friction in a air system causes..?
Inefficiency
why is polycarbonate used?
It’s strong and transparent
After air goes through the cooler but before the receiver where does it go?
Dryer
What can be installed to keep the piston clean?
Rod boot
What component protects other components and removes particulate?
Air line filter
What is the function of a lubricator?
Add oil drops, spray/mist to the air.
If the air motor is required to operate in both directions, what DCV is required?
4 way, 2 position
Which of the following is caused by an air line on the ground?
All of the above
Which components are required by ASME to be installed on a receiver?
A safety valve
What is the function of a pneumatic safety system?
It will not operate if there is an operator in the way as to not cause injury.
What is the 1st task in troubleshooting an air system?
To know the normal operating characteristics
Necessary heat loss, friction, fluid changing direction in a pneumatic system leads to?
Inefficiency
A double acting cylinder requires?
A moveable element to drive in either direction
If malfunctions are system wide, you should 1st investigate what?
The compressor, then the rest of the system.
The most common flow control valve is?
The needle vlv with a bypass check
In a pneumatic circuit the compressor does what?
Converts mechanical energy into potential energy
If a compressor has saturated air what condition causes vapor to condense?
Decrease in temperature
And increase in specific volume
In which compressor does the air get drawn in and chamber decreases as air compressed?
Reciprocating and slide vane
In terms of a DCV, what electrical device consists of a plunger and a wire and a coil.
A solenoid operated DCV
Large quantities of ____ can cause metal to rust and wash away.
Moisture
