Nait 4Th Period Compressors

Front 1

Compressor systems are pneumatic systems that operate

Back 1

Above atmospheric pressure

Front 2

A typical pneumatic system requires several basic components

Back 2

Compressor

Receiver tank

Filters

Pressure regulators

Lubricators

Mufflers

Dryers

Actuators

Control valve

Conductors

Safety valve

Front 3

In compressed air systems the air is compressed in an

Back 3

Electric, gasoline or diesel driven compressor

Front 4

Compressed air is stored in

Back 4

Receiver tanks

Front 5

Controls maybe of

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Individual

Auto start stop with safety valve

Constant speed control or dual control

Front 6

What is the pressure setting on a safety relief valve

Back 6

10-20psi

Front 7

An air receiving tank must hold an adequate air supply to prevent the system from a pressure drop of more than

Back 7

5psi when all service outlets are being used

Front 8

The pressure switch cut in and cut out differential should be

Back 8

15psi

Front 9

What should be installed at the lowest part of the receiver

Back 9

Automatic moisture trap

Front 10

Pre-filters or air cleaners are installed on the

Back 10

Suction inlet to the compressor

Front 11

Oil separators are generally installed between the

Back 11

Compressor and reciever

Front 12

After coolers bring the temperature of the compressed air down to

Back 12

Ambient temperature

Front 13

Intercoolers are used in conjunction with two stage compressors. Their purpose is to cool the compressor air by

Back 13

10F between the cylinder stages

Front 14

Intercoolers decrease the amount of power consumed by

Back 14

15%

Front 15

Air dryers should use an absorbing material like

Back 15

Silica gel

Activated alumina

Front 16

Service outlets are usually equipped with

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Quick connects

Front 17

Oil lubricators are required on some installations for

Back 17

Automatic lubrication of pneumatic tools

Front 18

What are the three types of compressors

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Reciprocating

Rotary vane

Flow compressor

Front 19

Reciprocating compressors are most common and are available in ______or ______ cylinder models

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Single or multi cylinder

Front 20

Increased capacity is accomplished by using different diameter cylinders the largest

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Is first in line and uses the discharge line for the next smalller cylinder

Front 21

Diaphragm compressors prevent

Back 21

Contaminants from entering the airstream

Front 22

There are two types of rotary vane compressors

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Single

Multiple

Front 23

The major moving part of a rotary vane compressor has

Back 23

Vanes and slots that trap the air

Front 24

Flow compressors use two types

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Screw

Turbo

Front 25

Both types of flow compressors operate at

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High speeds

Front 26

Small distribution systems use what material

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Type K and L

Front 27

Larger distribution systems use what material

Back 27

Sched 40 black iron pipe

Threaded up to 2in

Welded over 2in

Front 28

All piping should be _______ in the direction of flow

Back 28

Graded

Front 29

Drip legs should be taken off the _______ of the distribution piping

Back 29

Bottom

Front 30

What is the minimum size of service outlet

Back 30

1/2in

Front 31

What can be installed to remove water from piping

Back 31

Water trap with automatic drain

Front 32

Dew point is reached when

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100% humidity is reached

Front 33

To obtain 1cuft of compr air at 100psig the compr needs to move

Back 33

7cuft into the suction inlet

Front 34

For every 20C drop in temp, the air can hold only how much moisture

Back 34

1/2

Front 35

Air dryers are installed _____ of the receiving tank

Back 35

Downstream