Urinalysis and Body Fluids 6th Edition by Majorie DiLorenzo, Susan Strasinger

Exercise 35

A class ABC fire extinguisher contains:

A. Sand

B. Water

C. Dry chemicals

D. Acid

Step 1 of 2

Fire extinguisher:

• A device or container which jets out water, gas, foam to bring the fire down

• When a fire occurs in a laboratory, the NFPA system is followed by the fire fighters as it gives all procedures and codes for extinguishing fire

• National Fire Protection Association (NFPA) formed in 1896

o This system gives copyrighted standards and procedures for usage of equipment when engaged in hazardous chemicals and gives training to the fire fighters.

o The overall aim of NFPA is to decrease the fire hazard worldwide.

Types of fire extinguisher:

• Water and foam

• Carbon-dioxide

• Dry chemicals

• Wet chemicals

• Clean agent

• Dry powder

• Water mist

• Cartridge operated dry chemicals

Dry chemicals fire extinguisher is used widely because they can effectively extinguish the class A, B, and C fires by prevent the chemical reaction of the fire triangle.

• A class fires- fires occurred by wood, paper, fabric, trash.

• B class fires- fires by gas and flammable liquid

• C class fires-electric fires

• D class fires- combustible fire. For example: magnesium, titanium, etc,

• K or F class fires- fires caused by cooking oils, grease.

Therefore, “”dry chemicals” are present in class A, B and C fire extinguisher. Hence, the correct answer is option.