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Millwright 2nd Year > Compressors > Flashcards

Flashcards in Compressors Deck (37):
0

What are three ways pressure can be increased

Heat it
reduce the volume
add more gas into a confined space

1

When pressure is increased in an enclosed space the temperature...

increases or decreases

Increases

2

Bernoulli's principal and the law of conservation of energy apply to what

All fluids

3

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

4

How does a dynamic compressor operate

Using bernoulli's principle.

5

What does an absolute scale measure

Temperature and pressure

6

What are the two absolute temperature scales

Kelvin and Rankin

7

0° Kelvin is equal to what in degrees Celsius

-273°C

8

0° Rankine is equal to what in degrees Fahrenheit

-459°F

9

What does PSIA stand for

Pounds per square inch absolute

10

What does KPA stand for

Kilopascals

11

If all molecule motion has stopped and there is no pressure what is this called

Absolute pressure

12

Does gauge pressure account for atmosphere pressure

Yes
No

No

13

What occurs when the pressure in a container or building is less than the pressure surrounding it

Vacuum

14

Three common devices for measuring pressure

Barometer
Manometer
Bourbon tube

15

What can a barometer measure

Vacuum and pressure

16

A manometer is most accurate for measuring what

Vacuum

17

What happens when the bourbon tube gauge pressure goes up.

Is the tube to straighten out

18

What does Bernoulli's principle deal with

It constant flow of fluid

19

Combined gas law is a combination of which laws

Boyle, Charles and Gay-Lussic

20

What happens to the atmospheric pressure if an increase in altitude Occurs

Atmospheric pressure decreases

21

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

22

What is a single acting compressor

Compression happens on one side of the piston

23

What is a double-acting compressor

Compresses gases on both sides of the piston

24

Which compressors are the most common because of the widest range of operating suction and discharge pressures

Reciprocating compressors

25

The term single acting means what

Compression happens on one side of the piston

26

The term double acting compressor means what

The piston can compress gas on both sides

27

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

28

An integral compressor is essentially "what" combined into one frame with one common crankshaft

An engine and a compressor combined

29

What does the conrod connect to on a diaphragm compressor

Flexible membrane or a diaphragm

30

Where is a gas injection compressor most common

Oil production

31

How is gas lift slightly different than gas injection

Gas Passes through a series of lift valves pushing the oil out of the well

32

How many compressors are used for gas gathering

One central compressor to pull gas from a series of locations into one central pipeline

33

When doing coal seam gas evacuation what is mainly evacuated from the ground

Methane

34

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

35

How many kilometers should a boost station be from one another

150 to 300 km along the pipeline

36

What kind of compressors are commonly used in the compressor boost station application

Centrifuge compressors because they perform better with large volumes