Free STSC Fire Prevention and Protection in Construction Questions and Answers 1 — Questions and Answers
Question 1: According to OSHA standards for a construction site, what is the maximum travel distance from any point of a protected area to the nearest fire extinguisher for Class A fire hazards?
- 50 feet
- 100 feet
- 75 feet (Correct answer)
- 125 feet
Correct answer: 75 feet
For Class A fires (ordinary combustibles like wood, paper, and trash), OSHA standard 1926.150(c)(1)(i) requires that a fire extinguisher, rated not less than 2A, be provided for each 3,000 square feet of the protected building area. The travel distance from any point to the nearest fire extinguisher shall not exceed 75 feet.
Question 2: A supervisor needs to store more than 25 gallons of a Class IB flammable liquid on the job site. Which of the following is an approved storage method?
- In a locked steel gang box.
- In an approved flammable liquid storage cabinet. (Correct answer)
- Stacked neatly in the corner of the site trailer.
- In any container as long as it is more than 50 feet from an ignition source.
Correct answer: In an approved flammable liquid storage cabinet.
OSHA 1926.152 outlines the requirements for flammable and combustible liquid storage. Quantities over 25 gallons must be stored in an approved flammable liquid storage cabinet, which is specifically designed to protect the contents from fire for a specified period.
Question 3: During a hot work operation (e.g., welding), what is the primary duty of the designated fire watch?
- To assist the welder by handing them tools and materials.
- To watch for and extinguish any incipient stage fires in the hot work area. (Correct answer)
- To operate the welding equipment if the primary welder needs a break.
- To complete a safety audit of the entire job site.
Correct answer: To watch for and extinguish any incipient stage fires in the hot work area.
The fire watch's sole responsibility is to monitor the hot work area for any signs of fire. They must be trained to use a fire extinguisher, know how to sound the alarm, and must remain on duty for at least 30 minutes after the hot work is completed to watch for smoldering fires.
Question 4: A fire breaks out involving energized electrical equipment in a temporary site office. Which type of fire extinguisher is most appropriate to use?
- Class A (Water)
- Class D (Combustible Metals)
- Class C (Carbon Dioxide or Dry Chemical) (Correct answer)
- Class K (Kitchen/Grease)
Correct answer: Class C (Carbon Dioxide or Dry Chemical)
Class C fire extinguishers are designed for use on fires involving energized electrical equipment. They use non-conductive extinguishing agents like carbon dioxide or dry chemical powder, which will not create an electrocution hazard for the user.
Question 5: From a fire prevention standpoint, what is the most critical reason for a supervisor to enforce good housekeeping practices on a construction site?
- To improve the site's appearance for client walkthroughs.
- To prevent the accumulation of combustible debris that could fuel a fire. (Correct answer)
- To make it easier to locate lost tools.
- To reduce the number of required fire extinguishers.
Correct answer: To prevent the accumulation of combustible debris that could fuel a fire.
Poor housekeeping is a leading cause of construction fires. The accumulation of combustible materials like wood scraps, cardboard, and packaging provides ample fuel for a fire to start and spread rapidly. Regular cleanup is a fundamental and effective fire prevention measure.
Question 6: A supervisor notices that a subcontractor has stored a pallet of materials in a hallway that is part of a designated emergency exit route. What is the supervisor's immediate responsibility?
- Report the issue at the next weekly safety meeting.
- Have the materials moved immediately to ensure the exit route is clear. (Correct answer)
- Place a 'Caution' sign near the pallet.
- Find an alternate exit route and post a new map.
Correct answer: Have the materials moved immediately to ensure the exit route is clear.
OSHA requires that means of egress be continuously maintained free of all obstructions or impediments to full instant use in the case of fire or other emergency. A supervisor must take immediate action to correct any blockage of an exit route to ensure the safety of all personnel.
Free STSC Fire Prevention and Protection in Construction Questions and Answers 1
According to OSHA standards for a construction site, what is the maximum travel distance from any point of a protected area to the nearest fire extinguisher for Class A fire hazards?