WTT Safety Procedures 2 — Questions and Answers
Question 1: What is the minimum safe distance a technician must maintain from a rotating wind turbine blade tip during ground-level operations?
- 5 feet
- 15 feet
- Blade length plus 20% (Correct answer)
- 50 feet
Correct answer: Blade length plus 20%
The minimum safe distance is the full blade length plus 20% to account for blade flex and debris throw.
Question 2: When performing a Job Hazard Analysis (JHA) for nacelle work, which hazard category must always be listed first?
- Ergonomic hazards
- Fall hazards (Correct answer)
- Electrical hazards
- Chemical hazards
Correct answer: Fall hazards
Fall hazards are always the primary hazard category for nacelle work due to working heights exceeding 200 feet.
Question 3: A technician notices a co-worker has bypassed a safety interlock to speed up maintenance. The correct action is to:
- Complete the job first, then report it
- Immediately stop work and restore the interlock (Correct answer)
- Document it in the logbook and continue
- Report it only if an incident occurs
Correct answer: Immediately stop work and restore the interlock
Bypassed safety interlocks must be immediately restored as they are critical barriers against serious injury or death.
Question 4: Which OSHA standard specifically governs fall protection requirements for wind turbine technicians working at height?
- 29 CFR 1910.66
- 29 CFR 1926.502 (Correct answer)
- 29 CFR 1910.147
- 29 CFR 1926.1053
Correct answer: 29 CFR 1926.502
29 CFR 1926.502 sets fall protection system criteria and practices for construction-related work at height including wind tower work.
Question 5: What does the term 'exclusion zone' mean in the context of wind turbine safety?
- An area where only supervisors may work
- A restricted perimeter around hazardous operations where unauthorized personnel are barred (Correct answer)
- A zone where PPE is not required
- The nacelle interior during live electrical testing
Correct answer: A restricted perimeter around hazardous operations where unauthorized personnel are barred
An exclusion zone is a clearly marked restricted area established around hazardous operations to prevent unauthorized access.
Question 6: During blade installation, a sudden wind gust is detected. What is the priority action?
- Secure the blade and continue if gust subsides
- Lower the blade immediately and suspend operations (Correct answer)
- Increase crane line tension to counteract the gust
- Alert the crane operator and monitor wind speed
Correct answer: Lower the blade immediately and suspend operations
Wind gusts during blade installation create immediate loss-of-load risk; operations must be suspended and the blade lowered to a safe position.
Question 7: A technician is required to work inside a confined space within the tower base. Before entry, which document must be completed?
- Tool inventory sheet
- Permit-Required Confined Space Entry Permit (Correct answer)
- Standard work order
- Electrical isolation certificate only
Correct answer: Permit-Required Confined Space Entry Permit
A Permit-Required Confined Space Entry Permit must be completed and authorized before any entry into a permit-required confined space.
WTT Safety Procedures 2
What is the minimum safe distance a technician must maintain from a rotating wind turbine blade tip during ground-level operations?