Module 4

Question 1

Unit of metric measurement used to describe the size of particles; approximately 0.00004 in. (exactly 0.001mm)

Answer 1

Micron (or micrometer)

Question 2

The ability of a filter to remove contaminants

Answer 2

Dirt capacity

Question 3

In a filter, the pressure difference that would permit collected contaminant particles to pass through the filter

Answer 3

Maximum allowable pressure drop

Question 4

The process by which moisture collects on the surface of a material but is not absorbed by it

Answer 4

Adsorption

Question 5

The process by which moisture is drawn into the absorbing medium instead of collecting on the surface

Answer 5

Absorption

Question 6

Gravity contaminant separation takes place when a moving stream of air _____.

Answer 6

Slows down

Question 7

Cyclone and louver separators remove fine particles without causing a high _____.

Answer 7

Pressure loss

Question 8

The size of a particle of contamination is measured in _____.

Answer 8

Microns or Micrometers

Question 9

Separators, strainers, and filters are identified or rated by the _____ of particle they will stop.

Answer 9

Size

Question 10

To obtain the most efficient use of filtering equipment, use both surface filters and _____ filters.

Answer 10

Depth

Question 11

Surface filters should be used to remove _____ particles.

Answer 11

Large

Question 12

The strainer-wire weave that is preferred in air-filtration applications for its more efficient operation is the _____ weave.

Answer 12

Dutch Twill

Question 13

Ribbon elements usually have _____ cross section.

Answer 13

Tapered

Question 14

Name the three types of depth air filters.

Answer 14

Dry
Wetted
Oil Bath

Question 15

An efficient intake filter for a reciprocating compressor should remove 100% of particles measuring more than _____ microns.

Answer 15

10

Question 16

An adsorption filter removes vapor from the air by collecting moisture on the _____ of the medium.

Answer 16

Surface

Question 17

Chemical-medium filters that change color are of the _____ type.

Answer 17

Absorption

Question 18

Most pneumatic power tools require air that is compressed, cleaned, and _____.

Answer 18

Lubricated

Question 19

The two basic types of air line lubricators are termed _____ and _____.

Answer 19

Heavy, Fine

Question 20

Heavy lubricators should be used only for _____ or _____ airflows.

Answer 20

Continuous, High

Question 21

Lubricating equipment should always be placed after the _____ equipment.

Answer 21

Regulating

Question 22

What type of contaminant separation takes place when a stream of air is slowed down?

Answer 22

Gravity

Question 23

What occurs when part of the filter medium breaks off and is carried along with the air?

Answer 23

Medium migration

Question 24

Because of their ability to stop large particles, inertial separators are used as _____.

Answer 24

Prefilters

Question 25

The usual way to remove large particles from the air stream is by using a(n) _____ filter.

Answer 25

Surface

Question 26

Contaminant particle size is measured by the _____.

Answer 26

Microns

Question 27

Which type of filter primarily uses a medium that collects moisture on the medium surface?

Answer 27

Adsorption

Question 28

A strainer or filter is classified by the _____.

Answer 28

Size of particle it stops.

Question 29

What type of oil is used to lubricate pneumatic equipment?

Answer 29

Uncontaminated

Question 30

If a filter stops 96% of particles of a given size, that particle size determines its _____.

Answer 30

Nominal rating

Question 31

The best point in pneumatic system to place lubricating equipment is after the _____.

Answer 31

Regulator