NFPA 10 FINAL EXAM 2024-2025
ACTUAL EXAM COMPLETE 250
QUESTIONS WITH DETAILED
VERIFIED ANSWERS (100%
CORRECT ANSWERS) /ALREADY
GRADED A+
Halon Extinguisher Recharge- if the extinguisher
valve is removed for service, what is the
recommended? - ....ANSWER...Purge extinguisher
with nitrogen
All dry chemical and dry powder types of fire
extinguishers must have what? - ....ANSWER...All
traces of powder removed before filling with water.
All wheeled fire extinguishers equipped with a shut
off nozzle at the end of the hose must have: -
....ANSWER...A special adapter to test and recharge.
,First 4 principles of selecting fire extinguishers: -
....ANSWER...Ease of use, physical ability of people,
effectiveness of extinguisher, hazards in area.
The principle advantage of CO2 fire extinguisher is: -
....ANSWER...Leaves no residue
What does Bromochlorodiflouromethane stand for? -
....ANSWER...Halon 1211
What is a stored pressure? - ....ANSWER...Both agent
and pressure are in the same cylinder
The intended position for operating instructions is
usually located: - ....ANSWER...On the front of the
extinguisher
What class is a water extinguisher? -
....ANSWER...Class A
Can you use loaded stream on Class B fires? -
....ANSWER...No
,What do AFFF and FFFP extinguishers do to Class A
fires? - ....ANSWER...Film on fuel, no more oxygen,
cooling to prevent reignition.
What type of extinguisher is primarily intended for
use on Class B and Class C fires? -
....ANSWER...Carbon Dioxide CO2
What chemical may be used in a Dry Chemical
extinguisher primarily intended for use on Class B
and Class C fires? - ....ANSWER...Sodium
Bicarbonate, Potassium Bicarbonate, Potassium
Bicarbonate Urea Base, Potassium Chloride Base,
Bicarbonate Urea Base. (All of the above)
Class B rated extinguishers involving cooking grease
must have what type of chemicals? -
....ANSWER...Sodium Bicarbonate and Potassium
Bicarbonate.
What Chemical is in a Multipurpose Dry Chemical
Extinguisher? - ....ANSWER...Ammonium Phosphate.
, A stored pressure water fire extinguisher rated 2A
will protect an area of ____ in an ordinary occupancy.
- ....ANSWER...3000 sq. Ft.
What is the basic maximum travel distance to Class
B Extinguishers? - ....ANSWER...50 feet
The capacity of the fire extinguisher supplied for
each major Class C hazard situation must be
individually judged according to: - ....ANSWER...Size
of electrical equipment, configuration of equipment,
effective range of FE amount of class A and B
material.
Water extinguisher may only be installed where
temperatures range between 40° and 120° -
....ANSWER...True
When the electrical power is disconnected from an
energized electrical fire, the fire changes character
to that of a Class A or Class B or a combination if
both Class A and B. - ....ANSWER...True
What is a Class D fire? - ....ANSWER...Combustible
Metals
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