Air Conditioners

Question 1

What are the three types of air conditioners

Answer 1

Evaporator cooler
Compressor type
Heat pump

Question 2

4 functions of an evaporative cooler?

Answer 2

Lowers air temp
Filters the air
Circulates the air
Humidifies the air

Question 3

What are the 4 functions of a compressor type AC

Answer 3

Lowers temp
Filters air
Circulates air
De-Humidifies air

Question 4

What may some evaporator coolers need in addition to power?

Answer 4

Some will need a 1/4” water line from the pump

Question 5

What are the 5 types of energy

Answer 5

Radian
Chemical
Mechanical 
Nuclear
Electrical
Heat or thermal energy

Question 6

What is thermal energy?

And what are the two different kinds?

Answer 6

The energy that produces molecular motion

Sensible heat
Latent heat

Question 7

What is sensible heat?

Answer 7

Heat that creates a change in temp without causing a change in state

Heat that can be sensed or felt

Question 8

What is latent heat?

Answer 8

Heat that causes a change in state without changing then temp

Question 9

Which type of heat does a thermostat measure

Answer 9

Sensible heat

Question 10

What are 5 types of latent heat?

Answer 10

Fusion
Freezing 
Vaporization 
Condensation
Sublimation

Question 11

What is temperature?

Answer 11

It’s the measurement of the intensity of heat

Question 12

What it BTUs

Answer 12

British thermal units

The amount of heat it takes to raise or lower one pound of water, one Fahrenheit degree at sea level

Question 13

What are 3 methods of heat transfer?

Answer 13

Conduction
Radiation
Convection

Question 14

What is conduction?

Answer 14

The flow of heat through direct contact

Question 15

What is radiation

Answer 15

The flow of heat without direct contact

Question 16

What is convection

Answer 16

Heat transfer due to temp differential

Eg. Opening the door

Question 17

What are the two types or refrigerant

Which one is currently being used

Answer 17

R22

R410A is currently used

Question 18

How many ohms does the domestic heat pump reversing valve use?
Old?
New?

Answer 18

Old style 465 ohms
New style 265 ohms
+/- 10%

Question 19

Domestic heat pump will operate till what temp?

Answer 19

0•c (32f)

Question 20

What will the domestic heat pump do if it’s below 40F

Answer 20

It will cycle defrost every 25 min

Question 21

What are 4 causes of restricted ducting?

Answer 21

Collapsed ducts
Restricted duct entry
Separated duct work
Improper louver installation

Question 22

What are 5 common reasons why an AC would leak water

Answer 22

Collapsed gasket
Loose mounting bolts
Plugged evaporator drain holes
Gasket not covering old vent holes
Cracked AC base pan

Question 23

What are some possible fan motor maintenance

Answer 23

Some can be oiled with 3-4 drops

Question 24

What is the most common cause of frost build-ups

Answer 24

Reduced airflow

Question 25

What must the A/C circuit have for an A/C

Answer 25

Must have a dedicated circuit breaker

Question 26

What must you do before opening or disposing of the system

Answer 26

But be evacuated down to 0psi

Question 27

How long must you run the AC before checking delta temp

Answer 27

Half hour

Question 28

What conditions are the amps for on the data plate?

What must you do if it is different temperatures?

Answer 28

95F outdoors
80F indoors
50% humidity

Must raise or lower 1 amp for every 5F

Question 29

How do you reset a 5 button thermostat and what will come on the screen when complete?

Answer 29

Hold mode and zone, then turn on.

FF will appear on the screen