TB11 Dry Chemical Ext

Question 1

What chemical is in a dry chem ext?

Answer 1

Sodium bicarbonate NaHCO2

Question 2

What can it extinguish? (3)

Answer 2

Flammable liquids
Gases
Liquefied gases

Question 3

Dry chem is how many times more effective than CO2 on hydrocarbon fires?

Answer 3

Twice

Question 4

What is the shell of dry chem tested to?

Answer 4

600 psi

Question 5

The nozzle shapes the dry chem into what degree fan stream?

Answer 5

60

Question 6

The shell is filled with ___ lbs of dry chem and pressurized to ___ psi with comp air.

Answer 6

20lbs

165psi

Question 7

Extinguisher has a 20 B-C rating which means what?

Answer 7

Capable of extinguishing 20 soft deep layer of class B.

Question 8

The dry chem with the valve FULLY OPEN will last how long?

The dry chem on the dept will last how long?

Answer 8

10 seconds

60 seconds

Question 9

The dry chem extinguisher effective range?

Answer 9

15-20ft

Question 10

When using the dry chem on flammable liquids the initial discharge should be from a distance not closer than?

Answer 10

6-8ft

Question 11

The extinguisher will function when pressure is between ?

Answer 11

125-175psi

Question 12

Monthly members must do what with the extinguisher?

Answer 12

Invert and shake to preclude chemical caking