CHST CHST - Construction Health and Safety Technician Scaffolding and Elevated Work Platforms Questions and Answers 2 — Questions and Answers
Question 1: What is the maximum height-to-base ratio for a freestanding mobile scaffold before additional stabilization is required?
- 2:1
- 3:1 (Correct answer)
- 4:1
- 5:1
Correct answer: 3:1
The height of a mobile scaffold must not exceed 3 times the minimum base dimension without additional outriggers or ties.
Question 2: Which OSHA standard governs the use of aerial lifts in construction?
- 29 CFR 1926.452
- 29 CFR 1926.453 (Correct answer)
- 29 CFR 1926.502
- 29 CFR 1926.550
Correct answer: 29 CFR 1926.453
Aerial lifts used in construction are governed by OSHA 29 CFR 1926.453.
Question 3: When using an aerial lift (boom-supported), workers must:
- Clip their lanyard to an adjacent structure for extra security
- Stand on the floor of the bucket only and use a body belt or harness attached to the boom or basket (Correct answer)
- Keep at least one hand on the controls at all times
- Wear a hard hat but no fall protection is required below 15 feet
Correct answer: Stand on the floor of the bucket only and use a body belt or harness attached to the boom or basket
Workers in aerial lifts must stand only on the floor of the bucket and wear a body belt or harness attached to the boom or basket.
Question 4: What must be done before moving a mobile scaffold?
- Lower the platform to its lowest position
- Ensure no workers or materials are on the scaffold (Correct answer)
- Check that all casters are unlocked
- Both lower the platform and verify no workers or materials are on it
Correct answer: Ensure no workers or materials are on the scaffold
All workers and materials must be removed from a mobile scaffold before it is moved to prevent falls.
Question 5: Scaffold planks must extend beyond their end supports by a minimum of:
- 3 inches
- 6 inches (Correct answer)
- 12 inches
- 18 inches
Correct answer: 6 inches
Scaffold planks must extend at least 6 inches beyond their supports to prevent tipping.
Question 6: What is the maximum overhang allowed for a scaffold plank beyond its end support?
- 6 inches
- 12 inches
- 18 inches (Correct answer)
- 24 inches
Correct answer: 18 inches
Scaffold planks must not overhang their end supports by more than 18 inches to prevent excessive cantilever deflection.
CHST CHST - Construction Health and Safety Technician Scaffolding and Elevated Work Platforms Questions and Answers 2
What is the maximum height-to-base ratio for a freestanding mobile scaffold before additional stabilization is required?