REFRIDREATION

Question 1

Locations of refrigeration spaces

Answer 1

Fwd - 8Jz4 & 9Jz4
Aft - 7Qz6

Question 2

Refrigeration BRd?

Answer 2

Bard 3007

Question 3

What’s temp ranges for all compartments?
(4 types of compartments)

Answer 3

Cold room: -20°c
Cool room: 5°c-6°c
Combined dry provisions: 13°c
Bones stores 13°c

Question 4

Types of gases on the refrigeration ?

Answer 4

R134A and R404A

Question 5

Are the fridge gases flammable?

Answer 5

No

Question 6

What’s HCFC and HFC

Answer 6

HCFC- Hydrochlorofluorocarbon
HFC- Hydrofluorocarbon

Question 7

Does HFC have ozone depletion effect ?

Answer 7

No it does not

Question 8

Type of oil used ?

Answer 8

SW 68

Question 9

Is the oil hydroscopic ?

Answer 9

Yes

Question 10

Why is the oil hydroscopic on the system?

Answer 10

To allow moisture to be absorbed when reps are cold instead of moisture into the gas system dues to the gases becoming waxed so it does not block the TEV

Question 11

What’s the Montreal protocol?

Answer 11

Agreement to phase out harmful ozone depleting substances; CFCs, Halons, HCFCs

Question 12

What’s the Kyoto summit ?

Answer 12

Agreement to reduce all green house gasses; co2, HFC, PFC

Question 13

What’s the components of the system

Answer 13

Evaporator , compressor, condenser and TEV
Other components are the liquid reservoir,HP and LP trip and sight glass

Question 14

What kind of bottles do we hold on board

Answer 14

Refrigerant bottles
Recovery bottles
Oxygen free nitrogen bottles

Question 15

What are the different kinds of leak detection we use ?

Answer 15

IRLDS
Snoop
Spectral dye
Ultra sonic

Question 16

What does IRLDS stand for ?

Answer 16

infra red leak detection system

Question 17

What is in the fridge log?

Answer 17

How many fridges we have and where
The people certified to work on them
The amount of gas in the plants and bottles in KG’s
Maintenance conducted on the plants
Oils

Question 18

What does OFN Stand for

Answer 18

O2 free Nitrogen

Question 19

What is hydroscopic mean

Answer 19

It’s a type of oil that can absorbs water

Question 20

How can the plant tell you if it is running low on gas?

Answer 20

-constant running,
-low HP/LP on gauges
-sight glass(bobbles only and clear)

Question 21

What form would you need if there is a gas leak is it a major or minor type as well?

Answer 21

NSOR (Major)

Question 22

Why do we use OFN?