Module 3 Flashcards Preview

MT 108 Chapter 4 > Module 3 > Flashcards

Flashcards in Module 3 Deck (30):
1

the amount of water vapor suspended in the air at any time, compared with the amount of water vapor the air could hold if it were completely saturated

Relative humidity (RH)

2

the temperature at which water vapor condenses as it is cooled

Dew point

3

a device that causes air and water particles to separate

Moisture separator

4

a device, usually installed between the aftercooler and the air receiver, that removes oil and moisture from the system

Oil scrubber

5

Contaminants in air include dirt and _____.

Moisture

6

What are the two types of preliminary filters used with compressors?

Wet, Dry

7

Some dry filters use packed felt or cotton, and others use _____ elements.

Replaceable or Cartridge

8

In a wet filter, dirt is collected in the oil and in the ______.

Filter

9

The amount of water vapor contained in the air compared to what it could hold if it were completely saturated is called the _____.

Relative Humidity

10

The temperature at which water vapor condenses as it is cooled is called its _____.

Dew Point

11

The most common method used to remove vapor from compressed air is _____.

Condensation

12

After coolers that are used to condense water vapor in compressed air are cooled by _____ or _____.

Water, air

13

Water vapor in air begins to condense when the air is cooled to its _____.

Dew point

14

Compressed air can be dried by reducing its _____.

Temperature

15

Condensed moisture is usually removed from an aftercooler by a(n) _____ separator.

Mechanical

16

Moisture that is not removed by a separator can be extracted by directing the air through a(n) _____.

Oil scrubber

17

What are the two kinds of chemical air dryers used in pneumatic systems?

Deliquescent, adsorption

18

The type of chemical that absorbs moisture in a deliquescent air dryer is called a(n) _____.

Desiccant

19

The desiccant in an adsorption air dryer is regenerated by _____.

Heat

20

The required size of the receiver in a compressed air system depends on the system's requirements of _____, _____, and _____.

Air flow time, Air flow rate, Allowable pressure drop

21

The most common contaminants in the air are dirt and _____.

Water vapor

22

Which of the following is the most common method of removing vapor from compressed air?
a. Condensation
b. Evaporation
c. Freezing
d. Gravity separation

a. Condensation

23

When washing a primary air filter, be sure to use _____.

A recommended solvent

24

Which method of heat transfer is used in a shel-and-tube heat exchanger?

Counterflow

25

What term is used to compare the amount of moisture in the air to what it could contain?

Relative humidity

26

If all other factors are the same, the air that has the lowest dew point is the air that has the _____.

Least water vapor

27

The amount of moisture that can be held in air decreases as the _____.

Pressure increases

28

Most pneumatic systems remove moisture from the air stream by _____.

Mechanical separation

29

What term best describes the condensation temperature of water vapor?

Dew point

30

What type of air dryer uses a chemical agent that absorbs moisture from the air?

Deliquescent