Air Conditioning Theory

Question 1

BASIC REFIGERATION

What does the acronym CFC stand for?

Answer 1

chlorofluorocarbon

Question 2

BASIC REFIGERATION

List the 3 tyoes of Condensers

Answer 2

1. Air-Cooled
2. Water-Cooled
3. Evaporative

Question 3

BASIC REFIGERATION

Define : Temperature

Answer 3

Is a measure of the INTENSITY of heat of a substance and the measure of its molecular speed expressed in degrees.

Fahrenheit is used in the refrigeration industry.

Question 4

BASIC REFIGERATION

What is a sub-cooled liquid?

Answer 4

A liquid that has been cooled below the boiling (condensing) temperature, at a specified pressure.

Question 5

BASIC REFIGERATION

What is a superheated vapour?

Answer 5

A vapour heated to a temperature above its saturation point.

After a liquid has vaporized, the heat that it continues to absorb raises its temperature so that it becomes superheated.

Question 6

BASIC REFIGERATION

One ton of cooling is equivalent to how many Btu/hr.

Answer 6

12000 Btu/hr

Question 7

BASIC REFIGERATION

A recovery cylinder should be filled to a maximun of ____ % caparicty.

Answer 7

80%

Question 8

BASIC REFIGERATION

What type of personal protective equipment must be worn to prevent injury from frostbite?

Answer 8

1. Eye Protecction
2. Hand Protection
3. Proper Clothing against frost bite

Question 9

BASIC REFIGERATION

Is it necessary to obtain a permit before installing a cooling system?

Answer 9

YES

A permit mustr be taken out for every installation

Question 10

BASIC REFIGERATION

List he 3 types of metering systems?

Answer 10

1. Thermostatic Expansion
2. Capillary Tube
3. Orifice

Question 11

BASIC REFIGERATION

One type of filter can be used on all types of refrigerant.

TRUE or FALSE

Answer 11

FALSE

Question 12

BASIC REFIGERATION

List the 6 components of a basic cooling system.

Answer 12

1. Compressor
2. Evaporator
3. Condenser
4. Metering Device
5. Piping
6. Filter Drier

Question 13

BASIC REFIGERATION

Which side of the system is the evaporator considered to be in?

Answer 13

Low Pressure Side

Question 14

BASIC REFIGERATION

How many pressure changes will the refigerant in a cooling system undergo in a complete cycle?

Answer 14

Two

Question 15

BASIC REFIGERATION

List 3 types of dehumidfiers.

Answer 15

1. Heat Pump
2. Chemical Absorbent
3. Ventilating Humidifier

Question 16

BASIC REFIGERATION

The heat pump dehumidifier works under the same basic principles are an air conditioning heat pump.

TRUE or FALSE

Answer 16

TRUE

Question 17

BASIC REFIGERATION

Explain why dehumdifying ventilators do not work in hot humid climates.

Answer 17

Dehumdifying ventilators bring more outside air into the house which has more moisture in it.