Ammonia In Refrigeration Systems (Work Safe)

Question 1

Liquid ammonia is a clear fluid that _______ quickly at room temperature

Answer 1

evaporates

Question 2

Ammonia gas is easily ______ under pressure

Answer 2

liquefied

Question 3

Liquid ammonia has a very high compression ratio. What is it?

Answer 3

1 to 800. 1 litre of ammonia expands to form 800 litres of gas

Question 4

What effects would 2000ppm of ammonia have?

Answer 4

fatal after a few breaths

Question 5

what is the maximum allowable ammonia concentration exposure for an averaged eight hour period?

Answer 5

25ppm

Question 6

When will an ammonia detector usually trip?

Answer 6

35ppm

Question 7

What is a good method of leak detection?

Answer 7

moisten a strip of indicator paper and hold near suspected leak to see if strip changes colour to pink

Question 8

Good method for draining chiller oil?

Answer 8

use a length of tube and drain into bucket of water to reduce the amount of ammonia gas released, also wear proper respirators and always have at least two workers present unless there is a shut-off valve (deadman’s switch).

Question 9

Do not allow the amount of ammonia stored to exceed ___lb or 20% of normal ammonia charge (total amount in system) whichever is less.

Answer 9

300lb

Question 10

Never allow ammonia cylinders and containers to reach __C

Answer 10

50C

Question 11

When making repairs on a component in an ammonia system what procedures must be taken?

Answer 11

You must isolate the system so there is not flow of ammonia and thoroughly purge with water or steam to remove all traces of ammonia

Question 12

Where should emergency controls to shut down the ammonia compressor be located?

Answer 12

outside the machine room

Question 13

Class T machinery rooms must not contain any permanently installed flame-producing devices or hot surfaces over ____C

Answer 13

427C

Question 14

Class T machinery rooms wall, floors, and ceiling must be sealed from the rest of the building and must be constructed to have at least _ hour fire resistance rating

Answer 14

1

Question 15

In class T machinery rooms there must be at least ___ exit door open to the outside of the building

Answer 15

one

Question 16

In class T machinery rooms there must not be any exterior ________ under or near fire escapes or stairways

Answer 16

openings

Question 17

Without a direct read out from the ammonia monitor, every leak must be considered ____

Answer 17

IDLH

Question 18

Eye protection is not mandatory under normal working conditions (__ppm)

Answer 18

25ppm

Question 19

Workers who are controlling any liquid ammonia leak must have access to full ____ protective suits.

Answer 19

full body

Question 20

Ammonia reacts instantly with ________

Answer 20

moisture

Question 21

When ammonia concentrations are shown to be greater than 35ppm, workers must wear a ?

Answer 21

Full face piece respirator with cartridges

Question 22

Full face piece respirators with canisters or cartridges may be used in ammonia concentrations less than ___ppm

Answer 22

300ppm

Question 23

What must be worn if ammonia concentrations are greater than 300ppm?

Answer 23

A self contained breathing apparatus (SCBA)

Question 24

Canisters with an indicator window must be replaced when the material in the window has changed _______

Answer 24

colour

Question 25

Canisters or cartridges without an indicator window must be ________ after each use

Answer 25

replaced

Question 26

Workers may wear half face piece respirators with goggles if ammonia vapour concentrations are up to ____ppm. Because ammonia vapour causes immediate eye irritation, workers must always use gas-rated, vapour-tight chemical goggles with a half face piece respirator

Answer 26

250ppm

Question 27

Self contained breathing apparatuses must be worn when concentrations are ____ppm or more. A worker wearing a SCBA must not enter a contaminated atmosphere until a ______ qualified person is present

Answer 27

300ppm, second

Question 28

Name the two type of escape respirators;

Answer 28

1. bite block respirator

2. half facepiece cartridge respirators

Question 29

Bite block respirators must be worn with a ____ plug

Answer 29

nose

Question 30

Anyone entering an ammonia enclosure for any reason must carry an ______ respirator and keep it within arms reach at all times

Answer 30

escape

Question 31

What must you do for a worker who is working alone?

Answer 31

person-check radio/telephone

Question 32

Emergency equipment includes eye wash, and shower facilities and _____ ___ kits.

Answer 32

first aid

Question 33

Do not attempt to neutralize the ammonia burn with other _________

Answer 33

chemicals

Question 34

Skin contact with liquid ammonia or an ammonia gas stream leaking under high pressure can cause __________

Answer 34

frostbite

Question 35

Pure liquid ammonia can cause severe _____

Answer 35

burns

Question 36

Eye contact with liquid ammonia for even a short period can cause permanent disability such as ________. Flushing must begin within __ seconds

Answer 36

blindness, 10 seconds

Question 37

When flushing eyes you must forcibly hold eyelids open and after flushing has removed all traces of ammonia, cover both eyes with moistened sterile ______ pads and bandage enough to keep light out

Answer 37

gauze