Module E Flashcards
Zero degrees Kelvin is equal to _______ degrees Celsius
-273*C
Atmospheric pressure at sea level is equal to ________ bar
1 bar
Atmospheric pressure at sea level is equal to ________ psi
14.7 psi
Atmospheric pressure at sea level is equal to ________ kPa
101.4 kPa
You calculate gauge pressure by ______________________ from an absolute scale reading
subtracting 14.7
Compressed air operates in much the same manner as oil in a hydraulic system except for two major differences. What are they?
- Gases are compressible
- Gases expand to fill any container
What are the three ways that air pressure can be increased?
- Heat it
- Reduce the volume
- Add more gas to the confined space
Define Pascal’s Law.
Pressure in a confined static fluid acts equally and in all directions at right angles to the surface
When pressure is increased in an enclosed space, the temperature ______________
Increases
If the flow rate is constant and the velocity is decreased, there will be a(n) ____________ in pressure
increase
With an increase in altitude, a compressor needs ___________ power to drive the compressor
less
The combined gas law demonstrates the relationship between three variables before and after compression. What is the formula that shows this relationship?
P1V1/T1 = P2V2/T2
Which compressor has the power pistons and the compression pistons sharing the same crankshaft?
The integral compressor has the power pistons and the compression pistons sharing the same crankshaft
List the two reciprocating compressors that are particularly suited to oil-free air delivery.
- Labyrinth
- Diaphragm
Positive displacement compressors work on the principal of trapping a specific volume of air and then ______________ to get a higher pressure
Reducing the volume or compressing the air
