Chapter 6 Fire extinguishers

Question 1

What class of extinguisher is known as the all-purpose extinguisher?

Answer 1

Class A

Question 2

Class K is for what kind of fire?

Answer 2

Kitchen

Question 3

Class D extinguishers are for….

Answer 3

Combustible objects: magnesium, potassium etc…

Question 4

Class C extinguishers are for…

Answer 4

Electrical fires

Question 5

Class B extinguishers are for..

Answer 5

Flammable liquids

Question 6

What could be used as an extinguishing agent for class B?

Answer 6

CO2
Dry chemicals
Class B foam

Question 7

Class A extinguishers are for..

Answer 7

Ordinary combustibles

Question 8

True or false?
Water and water-based agents are a good option for class C fires

Answer 8

FALSEEE

Question 9

Dry powder works best for class D fires?

Answer 9

Falseeeee

Question 10

What is the process that turns fats and oils into a soapy film?

Answer 10

Saponification

Question 11

What are the 4 different processes that happen with the different types of extinguishers?

Answer 11

Smothering
Cooling
Chemical flame inhibition
Saponification

Question 12

The AFFF extinguishers (Aqueous film forming foam) are suitable and not suitable for which class of fires?

Answer 12

Intended : Class B
Non-suitable: Class C, D, K

Question 13

In which case would halogenated extinguishers be used?

Answer 13

When the extinguished material would be damaged by water or chemicals

Question 14

Wheeled extinguisher units are good for what kind of fires?

Answer 14

Class A,B,C

Question 15

Dry powder extinguishers are for… and that class represents what kind of fire

Answer 15

Class D fires for chemical fires

Question 16

During a visual inspection of an extinguisher, what 4 checks should you make?

Answer 16

Condition
Hose-Nozzle
Weight
Pressure

Question 17

What acronym and steps do you use for application method of an extinguisher?

Answer 17

PASS
P- Pull the pin
A- Aim the nozzle at the bas
S- Squeezer the handle (rapid test and then application)
S- Sweep nozzle back and forth

Question 18

How to select the right extinguisher? There are 8 factors you should consider, try to name as many as you can

Answer 18

-Classification of fuel burning
-Hazards to be protected against
-Atmospheric conditions
-Ease of handling
-Rating of extinguisher
-Size and intensity of fire
-Any life hazard or operational concern
-Availability of trained personnel

Question 19

For a class C fire, what should you do before extinguishing?

Answer 19

Turning off the electrical source

Question 20

What is the primary extinguishing when using water?

Answer 20

Cooling

Question 21

What is the primary method of extinguishment when using dry chemicals?

Answer 21

Chain inhibition

Question 22

When smothering happens, what is excluded from the burning process?

Answer 22

Oxygen

Question 23

What does the AFFF acronym stand for and what class of fire is it meant for?

Answer 23

AFFF : Aqueous film forming foam
Use: Class B fires

Question 24

What is the main chemical in purple K extinguishers?

Answer 24

Potassium bicarbonate

Question 25

What is another name for clean agent extinguishers?

Answer 25

Halogenated extinguishers