TB 11 Dry Chemical Fire Extinguisher

Question 1

Dry chemical extinguisher has what type of fire retardant in it?

Answer 1

Sodium bicarbonate
NaHCO 2

Question 2

Dry chemical extinguishers effectiveness is through what?

Answer 2

Provides smothering action, absorbs solid particles and water vapor which provides cooling, chemical chain reaction is interrupted

Question 3

Dry chemical extinguisher is how many more times effective the CO2 extinguishers?

Answer 3

Twice as effective

Question 4

Dry chemical extinguishers are effective on what type of fires?

Answer 4

Deep layered flammable liquid fires

Hydrocarbon and methane fires

Question 5

For acid spills how far do you hold dry chemical nozzle from acid?

Answer 5

2 to 3 feet above acid

Question 6

Can dry chemical extinguishers be used on electrical fires?

Answer 6

Yes

Question 7

Dry chemical extinguisher shell tank is tested to what psi?

Answer 7

600psi

Question 8

Dry chemical extinguishers is pressurized to psi?

Answer 8

165psi

Question 9

Dry chemical extinguishers working psi is what?

Answer 9

125 to 175psi

Question 10

What is the hose on a dry chemical extinguisher made up of?

Answer 10

Nylon reinforced hose with cone
* shapes to 60 degree cone*

Question 11

How many pounds of dry chemical is in the extinguisher?

Answer 11

20lbs

Question 12

20BC equals how many square feet and what class of fires to extinguish?

Answer 12

20 sq. Ft and class B and C fires

Question 13

What is the discharge time of a dry chemical extinguisher?

Answer 13

10 seconds
CO2 20 lbs discharge time 60 seconds

Question 14

What is the effective range of a dry chemical extinguisher?

Answer 14

15 to 20 feet

Question 15

Where do you send the dry chemical extinguisher to get recharged and what tag do you use?

Answer 15

Send to S&M with a F-175tag