AC

Question 1

To little heat or air flow will raise what

Answer 1

Pressures

Question 2

What’s superheat

Answer 2

It’s the temperature above the refrigerant saturation temperature

Question 3

What is evaporator temperature

Answer 3

The difference between space temperature and coil temperature

Question 4

Saturated refrigerant is what

Answer 4

Vapour and liquid

Question 5

How can saturated temp be converted

Answer 5

Convert pressures to temp chart

Question 6

Superheat is a example of

Answer 6

Sensible heat

Question 7

What is boiling point also referred as

Answer 7

Saturation or coil temp

Question 8

What’s dose the term de-super heat mean

Answer 8

Vapour cools

Question 9

Condense and de-super heat are in interchangeable terms

Answer 9

False

Question 10

Describe the liquid in sub cooling state

Answer 10

Liquid only

Question 11

What should not be used when cleaning microchannel condensers

Answer 11

Acid coil cleaners

Question 12

Most ice machines do not have filters

Answer 12

False

Question 13

On water cooled , when water regulator increases

Answer 13

The water flow increases

Question 14

Basic concept of water cooled condenser is

Answer 14

Fridgerants on the outside coil and water is in the middle coil

Question 15

What system has the greatest coil TD

Answer 15

AC

Question 16

High side of compression include components?

Answer 16

Above condensation pressures

Question 17

Explain low side of compression

Answer 17

Below vapour pressure

Question 18

Superheat is defined as

Answer 18

Sensible heat above saturation

Question 19

Hermetic compressor are usually used in what system

Answer 19

Low capacity

Question 20

Types of water cooled condenser

Answer 20

Double tube
Shell and coil
Shell and tube

Question 21

Double tube coil is set up how

Answer 21

Inner tube is water , outer tube is refrigerant

Question 22

Water cooled evaporator absorbs how many btu

Answer 22

970 btus

Question 23

When compressor stops the pressure in the evaporator

Answer 23

Increases

Question 24

Pipes for air conditioning are sized by

Answer 24

Outside diameter with soft temper

Question 25

Copper tubing comes in type

Answer 25

K
L

Question 26

CFC

Answer 26

Chloroflurocarbon

Question 27

What’s dehydration

Answer 27

Removal of moisture and non condensables

Question 28

Evaporator cooling

Answer 28

Liquid changes to a vapour by absorbing heat

Question 30

Sub cooling is described how

Answer 30

Cooled below the boiling point

Question 31

Saturation temp is described how

Answer 31

Boiling point of a liquid

Question 32

Superheat vapour is described

Answer 32

Vapour above it’s saturated point

Question 33

Licensed journeyman are allowed to install up to

Answer 33

5 tons (60 000 btu)

Question 34

Sludging , corrosion, oil, breakdown, carbon formation, or indications of

Answer 34

Compressor breakdown

Question 35

Latent heat has how many Btu

Answer 35

144 Btu/lb

Question 36

HCFC 22 or R22 are

Answer 36

Ozone depletion

Question 37

Newest generation of refrigerants are

Answer 37

Hydroflorocarbons

Question 38

HCF cantain

Answer 38

Hydrogen , fluorine , and carbon

Question 39

Never fill reclaim tanks past

Answer 39

80 percent