FST Fire Extinguishers 3

Question 1

How frequently must a hydrostatic test be performed on a stored-pressure dry chemical extinguisher?

Accepted Answer

Every 12 years

Answer

Stored-pressure dry chemical extinguishers require hydrostatic testing every 12 years per NFPA 10.

Question 2

An extinguisher with a '2-A:10-B:C' rating means it is rated for:

Accepted Answer

2 gallons of water equivalent for Class A, 10 square feet of flammable liquid for Class B, and electrical fires

Answer

The '2-A' means the extinguisher has the Class A firefighting equivalent of 2.5 gallons of water; '10-B' means it can extinguish 10 square feet of Class B fire; 'C' indicates it is safe for use on electrical fires.

Question 3

What is the maximum floor area that a single 2-A rated extinguisher can protect?

Accepted Answer

11,250 sq ft

Answer

Under NFPA 10, a 2-A extinguisher protects up to 6,000 square feet under light hazard occupancy, but one 'A' unit covers 3,000 sq ft up to a maximum of 11,250 sq ft per extinguisher.

Question 4

Which condition would require a fire extinguisher to be immediately removed from service?

Accepted Answer

A broken tamper seal with the pull pin still in place

Answer

A broken tamper seal indicates the extinguisher may have been used or tampered with, requiring immediate removal for inspection and possible recharging.

Question 5

For a high-hazard occupancy, what is the maximum travel distance to a Class B fire extinguisher?

Accepted Answer

30 feet

Answer

NFPA 10 requires a maximum travel distance of 30 feet to Class B extinguishers in high-hazard occupancies.

(FST) Fire Safety Technician Certification Practice Test

(FST) Fire Safety Technician Certification Practice Test

FST Fire Extinguishers 3