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WorksheetsBasics of Air Compressors
Total questions: 19
Worksheet time: 10mins
The Centrifugal air compressor ___.
Has valves that open and close at the proper time
Uses a series of rotors equipped with blades
Is only made in a single stage design
Uses an impeller to impart radial momentum to the air
The ___ of an air compressor is the volume of free air per minute that the compressor will supply at a given pressure.
Drive power
Maximum pressure
Capacity
Flow factor
The reciprocating piston air compressor ___.
Has valves that open and close at the proper time
Is similar to a turbine found in a jet aircraft
Is seldom used because of limited applications
Is only used in large manufacturing plants
The air compressor ___ switch is used to start and stop the air compressor’s motor.
Pressure
Vacuum
Reed
Proximity
Most air compressed air safety relief valves are ___.
Adjustable by the machine operator
Sealed with a lead seal
Permanently sealed shut
Left open
A positive displacement air compressor ___.
Recompresses the same volume of air twice
Produces a new volume of air for every stroke
Compresses the air by increasing the velocity of the air
Is best suited for high flow rate applications
The ___ pressure is the setting at which the air compressor is turned off.
Cut-in
Cut-out
Max pressure
Safety pressure
In a reciprocating piston air compressor ___.
Both valves are never closed
Both valves are never open
The intake valve is open as the piston moves down
The intake valve is open as the piston moves up
One instrument that is not used to measure compressor flow rate is a ___.
Flat plate orifice
Flow nozzle
Venturi
Pitot tube
The ideal gas law requires that temperature be stated ___.
In absolute units
In Celsius or Fahrenheit
In relative units
Degrees above freezing
Compressor duty cycle is ___.
How long a compressor must rest after a certain operating time
How long a compressor can operate between overhauls
The time needed to fill the tank from 0 to capacity
The maintenance time needed for each 1000 hours of running time
A two stage compressor ___.
Doubles the flow
Compresses the same volume of air twice
Has two pistons in each cylinder
Has two pistons that move up and down at the same time.
In an air compressor system, the tank drain ___.
Is used to remove water from the tank
Can serve as a pressure relief valve
Should only be opened for annual cleaning of the tank
Should be hard wired shut
If air pressure is used to clean an area, the pressure should be ___.
Full pressure
30 psi or less
100 psi minimum
200 psi maximum
The relationship between pressure, temperature, and volume can be described by ___.
Boyle's Law
Newton's Law
The Ideal Gas Law
The formula E=MC^2
The size of an air compressor is determined by adding together the ___ of all powered items that use the compressor.
Cylinder volumes
Maximum pressure
Average free air consumption
Capacities
A start/stop control turns off the motor of a compressor when the ___ needed is reached.
Volume
Flow
Temperature
Pressure
In an air compressor system, the ___ is also called the receiver.
Intake filter/Silencer
Compressor
Storage tank
After-cooler
Most safety relief valves have a ___ which is used to test the operation of the valve.
Test button
Foot switch
Solenoid
Pull ring
