Compressor Fundamentals Flashcards
T or F
0° kelvin is equal to -237°C
True
what is atmospheric pressure at sea level?
14.7 psi
T or F
you calculate gauge pressure by adding 14.7 to an absolute scale reading
False
Compressed air operates and much the same matter as oil and a hydraulic system except for two major differences. What are these two differences?
gases can be compressed
Gases expand to fill any container
what are three ways that air pressure can be increased?
reduce the volume
heat the gas
Pack more gas into the space
define pascal‘s law
Pressure applied to a static fluid is dispersed evenly in all directions, and at right angles
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 ______________ 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. State the formula that shows this relationship.
P1x V1 / T1 = P2 x V2 / T2
Which compressor has the power pistons and the compression pistons sharing the same crankshaft
Integral
List, the two reciprocating compressors that are particularly suited to oil free air delivery
Labyrinth
Diaphragm
T or F
positive displacement, compressors work on the principle of trapping a specific volume of air, and then reducing that volume (compressing) to get a higher pressure
True
how do compressors move gases and do work?
Raise the pressure of the gas
The purpose of the crosshead is to keep the ______________ centred in the packing throughout the full stroke
Piston rod
