Chapter 7: Portable Fire Extinguishers

Question 1

Extinguisher Classification

Answer 1

A: GREEN TRIANGLE: ordiary combustibles
B: RED SQUARE: flammale/combust. liquids
C: BLUE CIRCLE: energized electrical equipment
D: YELLOW STAR: combustible metals
K: N/A N/A: commercial cooking

Question 2

Class A ratings

Answer 2

1A-40A:
1A= 50 pieces of (5cm x 5cm x 50 cm)

5L of water = 1A

Question 3

Class B rating

Answer 3

1B-160B

1B= .09sqm or 1 sqf of liquid at appreciable depth of 6mm.

Question 4

Class C

Answer 4

no numerical rating

dry chem, CO2, Halon and other inert gases

Question 5

Class D

Answer 5

no numerical rating
we use met-L-X @ 14kg
sodium chloride is main agent

Question 6

Class K

Answer 6

Minimum of a 40B rating
wet chemical must: completely extinguish fire in fryer, prevent re-ignition for 20 min. and reduce temp 15.6’c below ignition point, cause no splashing

Question 7

Saponification

Answer 7

A reaction that emulsifies oil to form a type of soap that floats on the surface of oil and prevents re-ignition of the oil vapors

Question 8

Tanker
Pump
ATP
carry ….

Answer 8

Back Pack: A : 4A : 60-180s: 3-9m
Dry Chem: ABC: 20A60BC: 10-25s : 2-4.5m
CO2 : BC : 10BC : 10-30s : 1-2.5m

Question 9

Rescue
Ladder
Quint
carry….

Answer 9

Dry Chem: ABC: 20A60BC: 10-25s : 2-4.5m
CO2 : BC : 10BC : 10-30s : 1-2.5m
Met-L-X : // : // : 10-25s: 2-4.5m

Met-L-X dry powder: 14kg of agent in extinguisher
Dry Chem is MONNEX: 14 kg of agent

Question 10

REACT

Answer 10

Rescue
Ensure door is closed
Activate Alarm
Call 911
Try to extinguish

Question 11

PASS

Answer 11

Pull pin
Aim
Squeeze
Sweep

Question 12

A hand held Fire Extinguisher

Answer 12

not to exceed 25kg

Question 13

4 components of a Dry chem extinguisher

Answer 13

Pressure vessel
A Valve
Pressurizing Gas
Extinguishing Agent

Question 14

100ml of 4oz of Class A foam concentrate

Answer 14

In our 20L back pack will give us 0.5%-0.6% foam solution

Question 15

Occupancy Hazard Classifications

Answer 15

Light: Class A: minimal
Ordinary: box stores…Class A&B… COSTCO
Extra Hazard:Class A&B… Production or processing plants.. DOW