chapters 7,9,10

Question 1

Understand what numerical rating contains.

Answer 1

Square footage, and the letter represents the class fire

Question 2

Understand what a class B extinguisher is and what it works on

Answer 2

Identified by the letter B on solid red square; works on flammable or combustible liquids

Question 3

Understand what a class C extinguisher is

Answer 3

Identified by the letter “C” on a solid blue circle; Energized electrical equipment uses agents that will NOT conduct electricity, such as dry chemicals or carbon dioxide.

Question 4

Understand what a class K extinguisher is

Answer 4

Used for combustible cooking oils & fats.

Question 5

Understand what a loaded stream extinguisher is

Answer 5

Discharges a solution of water containing an alkali metal salt that prevents freezing at temperatures as low as -40F (-40C). Pressure for these fire extinguishers is supplied by a separate cylinder of C02

Question 6

Understand why we use a portable fire extinguisher

Answer 6

To extinguish incipient stage fires and to control fires where traditional methods of fire suppression are not recommended.

Question 7

Understand what a class K fire contains

Answer 7

A fire in a cooking appliance that involves combustible cooking media (vegetable or animal oils and fats)

Question 8

Know the NFPA standard that extinguisher use is for

Answer 8

NFPA 10

Question 9

Understand how fire extinguishers are classified

Answer 9

Class A ordinary combustibles
Class B flammable liquids
Class C energized electrical equipment
Class D combustible metals
Class K cooking fats/oils

Question 10

How does an extinguisher expel its contents?

Answer 10

By using pressurized air to expel the agents, this air can be stored in or out of the body in a cylinder or just uses pressure to expel the agents

Question 11

What are types of halon agents?

Answer 11

Fluorine, Bromine, Iodine, and Chlorine

Question 12

Know all classes of fire extinguishers

Answer 12

Class A, B, C, D, K

Question 13

What is the term light hazard?

Answer 13

Areas where the quality, combustibility, and heat release of the material are low, and majority of materials are arranged so that a fire is not likely to spread. Usually contain class A, but sometimes can contain class B

Question 14

How do multipurpose dry chemical agents prevent rekindling of a class A fuel?

Answer 14

They form a crust over the fuel

Question 15

What is the maximum discharge of a CO2 extinguisher?

Answer 15

3-8 feet, 8-30 seconds

Question 16

What does PASS stand for?

Answer 16

Pull pin, Aim, Squeeze, Sweep

Question 17

When should a hydrostatic test be done for a dry chemical extinguisher in a stainless steel shell?

Answer 17

Once every 5 years

Question 18

Why are halon extinguishers limited in production?

Answer 18

The agents damage the ozone layer

Question 19

Know the numbering system on each class of extinguisher.

Answer 19

Class A 1-40 Class B 1-640