Compressors Flashcards
When pressure is increased in an enclosed space the temperature…
increases or decreases
Increases
What are three ways pressure can be increased
Heat it
reduce the volume
add more gas into a confined space
Bernoulli’s principal and the law of conservation of energy apply to what
All fluids
What compressor has a sealed container where pressure is created on the inside surfaces by molecules of gas striking the surface creating a force
Positive displacement compressor
How does a dynamic compressor operate
Using bernoulli’s principle.
What does an absolute scale measure
Temperature and pressure
What are the two absolute temperature scales
Kelvin and Rankin
0° Kelvin is equal to what in degrees Celsius
-273°C
0° Rankine is equal to what in degrees Fahrenheit
-459°F
What does PSIA stand for
Pounds per square inch absolute
What does KPA stand for
Kilopascals
If all molecule motion has stopped and there is no pressure what is this called
Absolute pressure
Does gauge pressure account for atmosphere pressure
Yes
No
No
What occurs when the pressure in a container or building is less than the pressure surrounding it
Vacuum
Three common devices for measuring pressure
Barometer
Manometer
Bourbon tube
What can a barometer measure
Vacuum and pressure
A manometer is most accurate for measuring what
Vacuum
What happens when the bourbon tube gauge pressure goes up.
Is the tube to straighten out
What does Bernoulli’s principle deal with
It constant flow of fluid
Combined gas law is a combination of which laws
Boyle, Charles and Gay-Lussic
What happens to the atmospheric pressure if an increase in altitude Occurs
Atmospheric pressure decreases
List some problems moisture has on a compressed air system
Causes rust
Harmful to lubricants
Forms sludge
In some cases can cause moisture to freeze
What is a single acting compressor
Compression happens on one side of the piston
What is a double-acting compressor
Compresses gases on both sides of the piston
Which compressors are the most common because of the widest range of operating suction and discharge pressures
Reciprocating compressors
The term single acting means what
Compression happens on one side of the piston
The term double acting compressor means what
The piston can compress gas on both sides
Can the labyrinth compressor run without oil
Yes….creating a seal between the cylinder in the piston with a series of grooves machined on the piston and cylinder wall
An integral compressor is essentially “what” combined into one frame with one common crankshaft
An engine and a compressor combined
What does the conrod connect to on a diaphragm compressor
Flexible membrane or a diaphragm
Where is a gas injection compressor most common
Oil production
How is gas lift slightly different than gas injection
Gas Passes through a series of lift valves pushing the oil out of the well
How many compressors are used for gas gathering
One central compressor to pull gas from a series of locations into one central pipeline
When doing coal seam gas evacuation what is mainly evacuated from the ground
Methane
Since gas producers can buy cheaper gas in the off-season what is the most cost-effective way of gathering gas in a field
A gas storage in an old oil well stored underground
How many kilometers should a boost station be from one another
150 to 300 km along the pipeline
What kind of compressors are commonly used in the compressor boost station application
Centrifuge compressors because they perform better with large volumes
