[D2L] 102I Refrigeration & Oil Handling

Question 1

What refrigerant number series is used for zeotropes ?

Answer 1

400-499

Question 2

Why are chlorofluorocarbon based refrigerants banned from use in new equipment and for service work?

Answer 2

they contain chlorine that damages the ozone layer

Question 3

What is the refrigerant group for R-12?

Answer 3

Methane

Question 4

What refrigerant number series is used for inorganics ?

Answer 4

700-799

Question 5

Who is responsible for the phase-out schedules for ozone depleting substances?

Answer 5

The Montreal Protocol est. 1987

Question 6

R-134a has a high global warming potential due to a high carbon content.

T or F

Answer 6

True

Question 7

What is a negative quality for synthetic oils?

Answer 7

highly hygroscopic

Question 8

What is the maximum time that polyester oil should be exposed to the atmosphere?

Answer 8

5 minutes

Question 9

What safety ratings are refrigerants based on? (MULTI-SELECT)

1) Toxicity
2) Solidness
3) Colour
4) Flammability

Answer 9

1) Toxicity
4) Flammability

Question 10

What refrigerant code is ammonia?

Answer 10

R-717

Question 11

What colour is a recovery cylinder?

Answer 11

yellow top with a gray body

Question 12

What position should refrigerant cylinders be transported?

Answer 12

upright and secured

Question 13

Never exceed liquid water weight capacity (WC) by more than 80% at 70F or 60% at 120 F. (정확함)

T or F

Answer 13

True

the max temp limit with this is 125F

Question 14

Blended refrigerants must be added as liquids

T or F

Answer 14

True

Question 15

Which of the following are approved leak detection methods? (MULTI-SELECT)

1) bubble test
2) electronic
3) pressure test
4) litmus paper

Answer 15

1) bubble test
2) electronic
3) pressure test

Question 16

In a 65F room sits a bottle labelled r404a, on it a digital gauge that reads 135.5psig what is in the bottle.

Answer 16

saturated refrigerant

Question 17

In a 65*F room sits a bottle labelled r410a, on it a digital gauge that reads 185.1psig what is in the bottle.

Answer 17

saturated refrigerant

Question 18

In a 65*F room sits a bottle labelled r134a, on it a digital gauge that reads 35.05psig what is in the bottle.

Answer 18

?

Question 19

In a 65*F room sits a bottle labelled r401a, on it a digital gauge that reads 140.5psig what is in the bottle.

Answer 19

?

Question 20

TW (Tare Weight) stamped on the side of a cylinder indicates:

Answer 20

Empty cylinder weight