Pneumatics

Question 1

_____ _____ is the most important part of pneumatics.

Answer 1

Air preparation

Question 2

Boxes are also known as what?

Answer 2

Envelopes

Question 3

The inefficiency in a pneumatic system is generally the result of the necessary loss of what 3 things?

Answer 3

Heat during compression, friction and fluid changing direction.

Question 4

Frictions causes what 2 things?

Answer 4

Drop in pressure and loss of energy

Question 5

What is the purpose of a pressure switch?

Answer 5

Turns compressor on and off

Question 6

What is normally closed not allowing air to flow freely?

Answer 6

Safety relief valve

Question 7

What is normally open allowing air to flow freely?

Answer 7

Pressure regulator

Question 8

What are used to describe components in pneumatic systems?

Answer 8

Symbols

Question 9

What delivers sufficient amounts of air at a desired pressure?

Answer 9

Compressors

Question 10

Compressors convert _____ energy into _____ energy.

Answer 10

Mechanical, potential

Question 11

What is the most efficient type of compressor?

Answer 11

Multi-stage

Question 12

What type of compressors have air drawn in as the chamber size increases and air pushed out as the chamber size decreases?

Answer 12

Reciprocating and sliding vane

Question 13

What is used to start compressors under less torque?

Answer 13

Unloading

Question 14

What depicts the function of fluid power components?

Answer 14

Schematic symbols

Question 15

Air leaves the after cooler and goes to _____ prior to entering storage tanks.

Answer 15

Drier

Question 16

ASME codes require a _____ _____ be installed on most units.

Answer 16

Safety valve

Question 17

When hot air cools, it’s ability to carry water vapor _____.

Answer 17

Decreases

Question 18

If compressed air is saturated, what 2 conditions will cause some water vapor to condense?

Answer 18

Decrease in temperature or specific volume

Question 19

_____ _____ consist of a central main with small feeder lines and heads, making them simple in construction.

Answer 19

Grid systems

Question 20

Air flow may pass through a ____ _____ in one direction only.

Answer 20

Check valve

Question 21

What kind of cylinder is moveable in only one direction?

Answer 21

Single acting cylinder

Question 22

What kind of cylinder is moveable in either direction?

Answer 22

Double acting cylinder

Question 23

Cushions absorb _____ energy.

Answer 23

Kinetic

Question 24

5 basic elements of a fundamental pneumatic circuit:

Answer 24

Power source, pressure switch, conductor, DCV, actuator

Question 25

What does a graphic symbol reveal about a power component?

Answer 25

Components function

Question 26

The major cause of most malfunctions in a pneumatic circuit:

Answer 26

Poor maintenance

Question 27

Always relieve air pressure prior to \_\_\_\_\_.

Answer 27

Working

Question 28

Mark normal _____ \_\_\_\_\_ on a gauge.

Answer 28

operating pressure

Question 29

What keeps a piston clean?

Answer 29

Rod boot

Question 30

What is the first trouble shooting task?

Answer 30

Determine characteristics of the system

Question 31

What is the function of a pneumatic safety circuit?

Answer 31

To ensure the circuit doesn't operate with operator in harms way.

Question 32

Where do you start if there is a problem with the pneumatic system?

Answer 32

Beginning at the compressor then work through the rest of the system

Question 33

Actuator

Answer 33

Actuates plug valve

Question 34

Conductors

Answer 34

Rubber hose and piping directing plant air

Question 35

Electrical conduit

Answer 35

Carries electrical signal and electricity to operate valve

Question 36

Float

Answer 36

Sends signal to control room sending signal to solenoid to open or close

Question 37

Flow control valve

Answer 37

Regulates speed of actuator

Question 38

Solenoid operated DCV

Answer 38

Controls direction of air for opening and closing actuator

Question 39

Trio unit

Answer 39

Filters, regulates air pressure and provides lube to components downstream

Question 40

A common application of a 4 ported, 4-way directional valve is to _____ \_\_\_\_\_ _____ of a cylinder.

Answer 40

Cause reversible motion

Question 41

When _____ \_\_\_\_\_ passes through the coil of wire, a _____ field is generated. This _____ field tracts the plunger and pulls it into the coil.

Answer 41

Electrical current; magnetic; magnetic

Question 42

A _____ valve has a flow path which is almost straight through its center.

Answer 42

Ball

Question 43

A ball valve does/does not offer more than one direction of flow.

Answer 43

Does not

Question 44

The most common type of flow control valve found in a pneumatic system is the _____ valve with bypass check.

Answer 44

Needle

Question 45

T/F A flow control valve uses metered flow out of an actuator to control speed and allow flow into it.

Answer 45

True

Question 46

T/F A silencer can be installed on the exhaust ports of an actuator to reduce the noise and oil content.

Answer 46

True

Question 47

A good silencer should have _____ resistance to flow, provide sound attenuation, and be _____ resistant.

Answer 47

Low; corrosion

Question 48

What maintains constant pressure at the actuator?

Answer 48

Pressure regulator

Question 49

An ____ \_\_\_\_ filter is a device that is placed in the air line at the work station to be protected.

Answer 49

Air line

Question 50

In small/large quantities, moisture can wash away lubrication and in any quantity, will cause ____ to form.

Answer 50

Large; rust

Question 51

\_\_\_\_\_ bowls are good because they are transparent and tough.

Answer 51

Polycarbonate

Question 52

Add _____ drops, mist or spray into air stream.

Answer 52

Oil

Question 53

Answer 53

Float

Question 54

Answer 54

Electrical conduit

Question 55

Answer 55

Conductor

Question 56

Answer 56

Actuator

Question 57

Answer 57

Trio Unit

Question 58

Answer 58

Solenoid operated DCV

Question 59

Answer 59

Flow control valve