CHST CHST - Construction Health and Safety Technician Fall Protection and Prevention Questions and Answers 5 — Questions and Answers
Question 1: Which hierarchy of controls is MOST preferred when addressing a fall hazard on a construction site?
- Administrative controls such as warning lines
- Personal fall arrest systems
- Elimination or substitution of the hazard (Correct answer)
- Safety monitoring systems
Correct answer: Elimination or substitution of the hazard
The hierarchy of controls places elimination or substitution at the top, meaning redesigning the work to remove the fall hazard is always preferable.
Question 2: Skylights and roof openings must be guarded when they present a fall hazard. What is the minimum guardrail height required around such openings under OSHA 1926.502?
- 36 inches
- 39 inches
- 42 inches (Correct answer)
- 48 inches
Correct answer: 42 inches
OSHA 1926.502(b) requires guardrail systems to be 42 inches (plus or minus 3 inches) in height.
Question 3: A floor hole cover must be capable of supporting at least how many times the maximum intended load of workers, equipment, and materials?
- 1.5 times
- 2 times (Correct answer)
- 3 times
- 4 times
Correct answer: 2 times
OSHA requires floor hole covers to support at least twice the maximum intended load to provide an adequate safety factor.
Question 4: When conducting a Job Hazard Analysis (JHA) for fall prevention, which step should be performed FIRST?
- Select the appropriate fall protection equipment
- Identify all potential fall hazards in each task step (Correct answer)
- Train workers on fall protection
- Establish rescue procedures
Correct answer: Identify all potential fall hazards in each task step
A JHA begins with breaking down the job into tasks and identifying hazards before selecting controls or equipment.
Question 5: Under OSHA 1926.502, what is the minimum mid-rail height for a guardrail system?
- 18 inches
- 21 inches
- Between 21 and 31 inches above the walking surface (Correct answer)
- 30 inches
Correct answer: Between 21 and 31 inches above the walking surface
The mid-rail must be positioned at approximately the midpoint between the top edge of the guardrail (42 inches) and the walking surface, which is between 21 and 31 inches.
Question 6: What must an employer provide if a PFAS cannot be used during steel erection and guardrails are not feasible?
- Safety nets or a positioning device system (Correct answer)
- A safety monitor and warning line system
- An administrative control plan only
- Written documentation of the infeasibility
Correct answer: Safety nets or a positioning device system
When conventional fall protection is infeasible in steel erection, safety nets or positioning device systems are the required alternative.
Question 7: A fall protection plan that replaces conventional methods must be prepared and implemented by whom?
- The site superintendent
- A qualified person (Correct answer)
- A certified safety professional
- OSHA approval is required
Correct answer: A qualified person
OSHA 1926.502(k) requires that a fall protection plan be prepared by a qualified person — someone with recognized training, knowledge, and experience in fall protection.
CHST CHST - Construction Health and Safety Technician Fall Protection and Prevention Questions and Answers 5
Which hierarchy of controls is MOST preferred when addressing a fall hazard on a construction site?