CHST - Construction Health and Safety Technician Emergency and Fire Preparedness Questions and Answers Flashcards

According to NFPA 10, how far must a portable fire extinguisher be located from a Class B hazard in a construction setting?

Answer: 50 feet

NFPA 10 requires Class B fire extinguishers to be placed no more than 50 feet from the hazard.

During a construction site emergency evacuation, who is typically responsible for accounting for all workers at the assembly point?

Answer: The designated crew supervisor or foreman

Crew supervisors or foremen are typically assigned headcount accountability at assembly areas during evacuations.

A 'fire watch' on a construction site is required to remain on duty for how long after hot work operations cease, per OSHA guidelines?

Answer: 30 minutes

OSHA requires a fire watch to be maintained for at least 30 minutes after hot work is completed to detect smoldering fires.

Which class of fire extinguisher is specifically designed to fight fires involving energized electrical equipment on a construction site?

Answer: Class C

Class C extinguishers use non-conductive agents and are rated for energized electrical equipment fires.

What is the primary purpose of a pre-incident plan (pre-fire plan) developed for a construction site?

Answer: To provide responding emergency services with site-specific information

Pre-incident plans give responding fire departments critical site layout, hazard, and access information before an emergency occurs.

Under 29 CFR 1926.150, a fire extinguisher rated not less than 2A must be provided for each how many square feet of protected building area?

Answer: 3,000 sq ft

29 CFR 1926.150(c)(1)(i) requires one 2A-rated extinguisher per 3,000 square feet of the protected building area.

A construction worker discovers a small trash fire in a dumpster near a structure. What should be the worker's FIRST action?

Answer: Activate the site alarm and notify others before attempting suppression

Life safety takes priority—workers must alert others by activating the alarm before attempting any suppression efforts.