[ILM] 102I

Question 1

R-717 is

Answer 1

ammonia

Question 2

R-744 is

Answer 2

carbon dioxide

Question 3

R-764 is

Answer 3

sulphur dioxide

Question 4

R-40 is

Answer 4

methyl chloride

Question 5

R-290 is

Answer 5

propane

Question 6

Azeotropes
Zeotropes

Answer 6

1 mixture
2+ mixtures

Question 7

Chlorofluorocarbon (CFC)

Answer 7

contains chlorine and fluorine

Question 8

Hydrochlorofluorocarbon (HCFC)

Answer 8

contains chlorin, fluorine and hydrogen

Question 9

Hydrofluorocarbon (HFC)

Answer 9

contains fluorine and hydrogen

Question 10

Zeotropic refrigerants are in the

Answer 10

400 series

Question 11

Azeotropic refrigerants are in the

Answer 11

500 series

Question 12

CFC refrigerants depletes the earth’s ozone layer, they are banned from use in new systems or in recharging old refrigerant systems

T or F

Answer 12

True

Question 13

as of 2020, _____ cannot be used in recharging old refrigerant systems

Answer 13

HCFC refrigerants

Question 14

Halocarbon refrigerants are non-flammable, but break down chemically in a flame

T or F

Answer 14

True

Question 15

The Montreal Protocol, established in

Answer 15

1987, and provided phase-out schedules for ozone-depleting substances

Question 16

Refrigeration oils

Answer 16

they use synthetic oils now and they are called polyolester oils

more expensive than mineral oils

Question 17

polyolester oil

Answer 17

highly hygroscopic, it has a significantly strong attraction for water

should not remain exposed to the atmosphere for more than 5 minutes

Question 18

Low toxicity (Class A)

Answer 18

is equal to and above 400 parts per million (ppm)

Question 19

High toxicity (Class B)

Answer 19

is equal to and below 399 part per million (ppm)

Question 20

Cylinder Type

R-134a
R-22
R-404A
R-410A
R-507
R-717 (ammonia)

Answer 20

Colour Code

Light sky blue
Light green
Orange
Rose
Blue green (teal)
Silver

Question 21

Refrigerant recovery cylinders have a

Answer 21

yellow top and gray body

cannot exceed 300lb

Question 22

Cylinders for flammable refrigerants have a red band on the top

T or F

Answer 22

True

Question 23

always transport and store cylinders in an upright & secure mode

Answer 23

True

Question 24

Never exceed the liquid water weight capacity by more than

Answer 24

80% at 70F
or
60% at 125F (max limit)

Question 25

the temperature inside service trucks can exceed 125F on summer days

Answer 25

True

Question 26

liquid recovery

Answer 26

The quickest method of recovery and it does not remove the vaporous refrigerant. Vapour removal method is necessary after the liquid removal

Question 27

vapour recovery

Answer 27

the slowest method of recovery

Question 28

A refrigeration system should contain at least 20lb of refrigerant for the push-pull recovery method to work effectively

Answer 28

True

Question 29

you must report leaks that exceed _____ to the Alberta Environment

Answer 29

10kg (22lb)

Question 30

Always replace the vacuum pump's oil

Answer 30

prior to each evacuation

Question 31

connecting the vacuum pump to both the high and low sides of a system reduces the evacuation time

Answer 31

True

Question 32

There are _____ microns in an inch

Answer 32

760,000