CFB Safety Regulations & Compliance 3 — Questions and Answers
Question 1: Which type of fire extinguisher is appropriate for electrical equipment fires (Class C) in a field construction environment?
- Water (Class A)
- CO2 or dry chemical (non-conductive agent) (Correct answer)
- Foam (AFFF)
- Wet chemical (Class K)
Correct answer: CO2 or dry chemical (non-conductive agent)
CO2 and dry chemical extinguishers are non-conductive and safe for Class C electrical fires; water and foam conduct electricity.
Question 2: Under EPA regulations, who is responsible for preparing a Spill Prevention, Control, and Countermeasure (SPCC) Plan for a construction site storing large quantities of fuel?
- The local fire marshal
- The facility owner or operator (Correct answer)
- OSHA's regional office
- The general contractor's insurance carrier
Correct answer: The facility owner or operator
EPA 40 CFR Part 112 places responsibility for SPCC plan preparation on the facility owner or operator storing oil above threshold quantities.
Question 3: What minimum distance must a ladder extend above the landing surface when used for accessing elevated work areas?
- 1 foot
- 2 feet
- 3 feet (Correct answer)
- 4 feet
Correct answer: 3 feet
OSHA 1926.1053(b)(1) requires portable ladders to extend at least 3 feet above the upper landing surface.
Question 4: A worker is using a powder-actuated tool to fasten anchor bolts into concrete. What PPE is specifically required in addition to standard eye protection?
- Chemical splash goggles
- Hearing protection and a face shield (Correct answer)
- Tinted safety glasses only
- A hard hat with chin strap
Correct answer: Hearing protection and a face shield
Powder-actuated tools produce loud impulse noise and projectile risk, requiring both hearing protection and a face shield per OSHA 1926.302(e).
Question 5: Which regulatory agency enforces the Clean Air Act provisions relevant to asbestos demolition and renovation on construction sites?
- OSHA
- EPA (Correct answer)
- DOT
- NIOSH
Correct answer: EPA
The EPA enforces the National Emission Standards for Hazardous Air Pollutants (NESHAP) for asbestos under the Clean Air Act.
Question 6: According to OSHA's excavation standard, what is the minimum trench depth that requires a protective system such as sloping, shoring, or trench boxes?
- 2 feet
- 4 feet
- 5 feet (Correct answer)
- 6 feet
Correct answer: 5 feet
OSHA 1926.652 requires a protective system for all trenches 5 feet or deeper unless the excavation is in stable rock.
Question 7: What is the required minimum safe working distance from energized overhead power lines rated up to 50 kV for construction equipment operators?
- 5 feet
- 10 feet (Correct answer)
- 15 feet
- 20 feet
Correct answer: 10 feet
OSHA 1926.1408 requires a minimum clearance of 10 feet from power lines rated up to 50 kV for equipment operations.
CFB Safety Regulations & Compliance 3
Which type of fire extinguisher is appropriate for electrical equipment fires (Class C) in a field construction environment?