Extinguishers

Question 1

What are the components of the fire tetrahedron?

Answer 1

• Heat
• Oxygen
• Fuel
• Chemical chain reaction

Question 2

What is a Class A fire?

Answer 2

solid carbonaceous materials
(wood, paper, rubber, etc.)

Question 3

What is a Class B fire?

Answer 3

Flammable liquids
(petrol, oil, alcohol, etc.)

Question 4

What is a Class C fire?

Answer 4

Flammable gases
(LPG, acetylene, etc.)

Question 5

What is a Class D fire?

Answer 5

Combustible metals
(magnesium, sodium, aluminium shavings, etc.)

Question 6

What is an E type fire?

Answer 6

Fire involving electricity

(considered a sub-class of class D as electricity is not a fuel)

Question 7

What is a Class F fire?

Answer 7

Fats and cooking oils

Question 8

What is the approximate throw and discharge time of a water extinguisher?

Answer 8

6 metres for 60 seconds.

Question 9

What is the approximate throw and discharge time of a dry chemical extinguisher?

Answer 9

4 metres for 45-60 seconds.

Question 10

What is the approximate throw and discharge time of a foam extinguisher?

Answer 10

5 metres for 45 seconds.

Question 11

What is the approximate throw and discharge time of a CO2 extinguisher?

Answer 11

1-2 metres for 15 seconds.

Question 12

What is the acronym used for how to operate an extinguisher?

Answer 12

PASS

Pull
Aim
Squeeze
Sweep

Question 13

Which type of extinguisher is most effective for E type fires?

Answer 13

Dry chemical.