Compressors

Front 1

What type of compressor requires the veins to be made from a special material with a low coefficient of friction?

Back 1

Dry vane

Front 2

What type of compressor is flooded with oil all the time it is running?

Back 2

Wet vane

Front 3

How do you vein compressor systems often illuminate the need for an air receiver

Back 3

By using inlet throttling system

Front 4

What is the only major moving part in a sliding thing compressor?

Back 4

Rotor assembly

Hint 4

Rotor assembly

Front 5

What prevents high pressure discharge her from leakage back into the low pressure suction area in a vane compressor

Back 5

Centrifugal force, along with oil seal on vanes

Front 6

Low viscosity oil provides a good seal at high pressure true or false

Back 6

False, it is easily displaced

Front 7

Low flow device

Back 7

Low flow device

Front 8

What two ways can air cleaner restrictions be checked?

Back 8

Air cleaner service indicators, water manometer

Front 9

What are aftercoolers designed to do?

Back 9

Knock out moisture

Front 10

It is common to keep the incoming coolant water temperature lower than the temperature of the incoming gas true or false

Back 10

False water should be warmer than the gas

Front 11

What device measures rod drop?

Back 11

Proximity prob

Front 12

What for purposes does a distance piece serve

Back 12

Prevents gas from pressurizing crank case, prevent oil from crank house from reaching cylinder, provide access to packing and oil wipers, access for rodrun out

Front 13

What basic style of distance piece would be most likely needed for an absolute oil free application?

Back 13

an extra long distance peace with the baffle

Front 14

Cross heads with Shay mobile shoes provided for rod run out adjustment in which plane vertical or horizontal?

Back 14

Vertical

Front 15

To make the packing seal efficiently on the piston rod

Back 15

To make the packing seal efficiently on the piston rod

Front 16

If the compressor has a built-in pressure ratio it is adjustable or not adjustable?

Back 16

Not adjustable

Front 17

How is compressor capacity determined on a vane compressor?

Back 17

Volume of air between two sets of vans at max volume times number of vans divided by RPM

Front 18

Whydo nonlubricated veins generally produce air at low pressures?

Back 18

They cannot sustain high temperature generated when high pressure is required

Front 19

What is the purpose of oil in a wet vane compressor?

Back 19

Cool, seal, lubricate, prevent corrosion

Front 20

What is the principle involved with designing a van compressor system without an air receiver?

Back 20

The air pressure being produced inside the casing is used to control the position of the inlet unloader valve

Front 21

Which valve on a wet vein serves the purpose of ensuring that the oil circulation system is satisfied first before the compressor sends any air to the system?

Back 21

The minimum pressure valve located on the compressor discharge

Front 22

Under what conditions does the minimum pressure valve remain open?

Back 22

As long as system pressure mean remains above 60 psi

Front 23

Loyal pressure can be caused by a suction inlet pipe having Lieke threads true or false

Back 23

True

Front 24

High viscosity oil causes a rise in oil pressure because it’s harder to pump true or false

Back 24

True

Front 25

What are two major classifications of dynamic compressors?

Back 25

Centrifugal, axial

Front 26

How do dynamic compressors produce pressure

Back 26

Convert velocity into pressure

Front 27

What can be done to increase the efficiency of a single stage compressor

Back 27

Add diffuser veins

Front 28

What Hass to be done to increase the volume and overall pressure ratio of a centrifugal compressor

Back 28

Add impellers and their individual diffusers to shaft

Front 29

Name three styles of impellers in Centrifugal compressors

Back 29

Open, semiopen, closed

Front 30

Which casing design do you use for high-pressure applications

Back 30

Closed impeller

Front 31

Sectional, horizontal split, vertical split

Back 31

Sectional, horizontal split, vertical split

Front 32

How does the gas get into and out of the liquid ring compressor

Back 32

Through a set of cones surrounding the shaft

Front 33

Do you use a wire alignment on main bearings in order to check for roundness true or false

Back 33

False you use wire for alignment

Front 34

Deflection gauge

Back 34

Deflection gauge

Front 35

How are compressor valves opened?

Back 35

Pressure differential

Front 36

What causes axial thrust in a dynamic compressor

Back 36

The difference in pressure between the impeller and the back of the housing

Front 37

What are three ways that you can illuminate axial thrust

Back 37

Thrust bearings, balance pistons, opposing gas flows

Front 38

How does the most common seal prevent leakage

Back 38

Allows small pressure drops through each stage

Front 39

Three other types of seals you can find in dynamic compressors

Back 39

Carbon ring, oil/what seals, dry gas seals

Front 40

What are five factors that influence the selection of a prime mover

Back 40

Speed range,available power,HP requirements, economic consideration, customer requirements

Front 41

What type of compressor has aerodynamically shaped blades

Back 41

Axial flow compressor

Front 42

Which instrument can you use to inspect the internal components without removing casing covers

Back 42

Borescope

Front 43

What is a liquid ring compressor able to handle

Back 43

Saturated, explosive, dirty and abrasive gases

Front 44

Wire horse power requirements for liquid ring compressors much higher than a reciprocating compressor of the same size

Back 44

The rotor is continually turning in a ring of seal liquid