CLC Job Site Safety & Risk Management 3 — Questions and Answers
Question 1: A lead carpenter discovers mold behind drywall during a remodel. The correct response is to:
- Remove it immediately without notifying anyone
- Bag and dispose of it as normal construction debris
- Stop work, notify the client and project manager, and follow remediation protocols (Correct answer)
- Apply bleach and encapsulate before continuing
Correct answer: Stop work, notify the client and project manager, and follow remediation protocols
Mold discovery requires work stoppage and proper notification because it may require licensed remediation and creates health hazards for workers.
Question 2: Which type of fire extinguisher is most appropriate for an electrical fire caused by a short-circuited power tool?
- Class A (water)
- Class B (foam)
- Class C (dry chemical or CO₂) (Correct answer)
- Class D (dry powder)
Correct answer: Class C (dry chemical or CO₂)
Class C extinguishers are designed for energized electrical equipment fires because they use non-conductive suppressing agents.
Question 3: Before excavating near a building foundation for a deck installation, the lead carpenter must:
- Obtain a dig permit and call 811 to mark utilities (Correct answer)
- Check with the homeowner about buried features
- Probe the soil by hand to a depth of 12 inches
- Review the original building blueprints only
Correct answer: Obtain a dig permit and call 811 to mark utilities
Calling 811 (Call Before You Dig) and obtaining required permits is legally required before any excavation to prevent striking buried utilities.
Question 4: What is the primary purpose of a site-specific safety plan on a large residential renovation?
- To satisfy insurance auditors only
- To document and communicate hazards and controls specific to that project (Correct answer)
- To serve as a substitute for worker training
- To comply with local building permit requirements
Correct answer: To document and communicate hazards and controls specific to that project
A site-specific safety plan identifies unique hazards of a particular project and establishes controls before work begins.
Question 5: A worker on your crew reports tingling in their hands after using a vibrating power tool for several hours daily. This symptom may indicate:
- Carpal tunnel syndrome requiring only rest
- Hand-arm vibration syndrome (HAVS), a cumulative trauma disorder (Correct answer)
- A normal short-term reaction requiring no action
- Carbon monoxide exposure from nearby equipment
Correct answer: Hand-arm vibration syndrome (HAVS), a cumulative trauma disorder
Repeated tingling after vibrating tool use is an early sign of HAVS, which requires task rotation, proper PPE, and medical evaluation.
Question 6: When setting up a scaffold on uneven ground, what is the correct method to ensure the base is level and stable?
- Use concrete blocks stacked to match the height difference
- Use adjustable screw jacks on base plates on solid mud sills (Correct answer)
- Drive stakes into the soil and tie the scaffold to them
- Lean the scaffold against the building for lateral support
Correct answer: Use adjustable screw jacks on base plates on solid mud sills
Adjustable screw jacks on base plates with mud sills distribute load evenly and allow leveling on uneven ground per OSHA scaffold standards.
Question 7: Which OSHA regulation governs fall protection requirements for residential construction?
- 29 CFR 1910.22
- 29 CFR 1926.502 (Correct answer)
- 29 CFR 1910.147
- 29 CFR 1926.100
Correct answer: 29 CFR 1926.502
29 CFR 1926.502 sets the criteria and practices for fall protection systems in construction, including residential work.
CLC Job Site Safety & Risk Management 3
A lead carpenter discovers mold behind drywall during a remodel.
The correct response is to: