OSHA 30 Construction — All Questions
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65 questions
Formwork and reinforcing-steel work 6 feet or more above a lower level requires:
- a.Personal fall arrest, safety net, or positioning device systems✓
- b.No protection because rebar gives grip when the crew is short on time
- c.Only a pair of work gloves
- d.A safety monitor with no other system
Under 29 CFR 1926.501(b)(5), workers on the face of formwork or reinforcing steel 6 feet or more above a lower level must use personal fall arrest, safety net, or positioning device systems. Rebar is also capped to prevent impalement. Height triggers protection regardless of handholds.29 CFR 1926.501(b)(5)
On ramps, runways, and other walkways, fall protection is required when a worker could fall:
- a.Only above 25 feet of height
- b.Only on the ground floor level according to older industry practice
- c.Never on any walkway at all
- d.6 feet or more to a lower level✓
Under 29 CFR 1926.501(b)(6), each worker on a ramp, runway, or other walkway must be protected from falling 6 feet or more by a guardrail system. The 6-foot trigger is consistent across most construction tasks. Guardrails are the usual choice for walkways.29 CFR 1926.501(b)(6)
At the edge of an excavation 6 feet or more deep that is not readily seen, workers must be protected by:
- a.Guardrails, fences, barricades, or covers✓
- b.A single rope laid on the ground
- c.A shouted warning from a coworker
- d.Nothing, since the trench is obvious unless a supervisor decides otherwise
Under 29 CFR 1926.501(b)(7), workers at the edge of an excavation 6 feet or more deep must be protected when it is not readily seen because of plant growth or other barrier, using guardrails, fences, barricades, or covers. Wells, pits, and shafts are similarly protected. This prevents falls into deep openings.29 CFR 1926.501(b)(7)
Who must the employer have train each worker exposed to fall hazards, and on what?
- a.A vendor, on product pricing
- b.Any worker, on company history for the majority of standard tasks
- c.A competent person, on recognizing and minimizing the hazards✓
- d.No one; training is optional
Under 29 CFR 1926.503, a competent person must train workers to recognize fall hazards and to use the fall protection systems correctly. Training covers the nature of the hazards, correct procedures, and the systems in use. It must be understandable to the worker.29 CFR 1926.503
When must workers be retrained in fall protection?
- a.When changes or inadequate understanding make prior training obsolete✓
- b.Only once every ten years
- c.Never once initially trained
- d.Only after a jobsite fatality based on the project's own schedule for typical light-duty operations
Under 29 CFR 1926.503(c), retraining is required when changes in the workplace or fall protection systems render prior training obsolete, or when a worker shows inadequate knowledge or skill. Retraining keeps competency current. It is triggered by conditions, not a fixed clock.29 CFR 1926.503(c)
The employer's fall protection training must be documented with:
- a.No record kept at all
- b.A written certification with name, date, and trainer's signature✓
- c.A note of the worker's shoe size in the absence of a written program
- d.A verbal promise made once
Under 29 CFR 1926.503(b), the employer must prepare a written certification record with the employee's name, the training date(s), and the signature of the trainer or employer. The record verifies training occurred. It must be kept current.29 CFR 1926.503(b)
What is a 'leading edge' in fall protection terms?
- a.The edge of an office desk
- b.An edge of a floor or roof that changes location as work progresses✓
- c.The top of a portable ladder
- d.The front bumper of a work truck as a general rule of thumb on site provided the weather stays clear
Under 29 CFR 1926.500, a leading edge is the edge of a floor, roof, or formwork that changes location as additional sections are placed. Workers constructing a leading edge 6 feet or more up need fall protection. Leading-edge work is a recognized high-hazard activity.29 CFR 1926.500
A horizontal lifeline used for fall arrest must be:
- a.Designed and used under a qualified person with a safety factor of two✓
- b.Rigged by any worker on the spot
- c.Made from any spare rope available where the foreman signs off on it during the earlier phases of work
- d.Used with no engineering at all
Under 29 CFR 1926.502(d), horizontal lifelines must be designed, installed, and used under the supervision of a qualified person as part of a complete system maintaining a safety factor of at least two. Forces in a horizontal lifeline can far exceed the worker's weight. Engineering prevents anchor overload.29 CFR 1926.502(d)
A self-retracting lifeline that limits free fall to 2 feet or less must sustain a minimum tensile load of:
- a.3,000 pounds✓
- b.50 pounds
- c.200 pounds
- d.No minimum at all
Under 29 CFR 1926.502(d), self-retracting lifelines and lanyards that limit free fall to 2 feet or less must sustain a minimum tensile load of 3,000 pounds. Those that do not limit free fall to 2 feet must sustain 5,000 pounds. SRLs reduce free-fall distance and arrest forces.29 CFR 1926.502(d)
What does 'total fall distance' include when calculating clearance?
- a.Only the length of the lanyard for typical light-duty operations for most residential-scale jobs
- b.Free fall, deceleration distance, harness stretch, and a safety margin✓
- c.Only the time of day at work
- d.Only the worker's own height
For the clearance calculation under 29 CFR 1926.502(d), total fall distance combines the free fall, the deceleration (shock-absorber) distance, harness stretch, and a safety factor, measured from the anchor. If this exceeds the distance to the lower level, the worker hits the ground. This matters most when anchoring below the D-ring.29 CFR 1926.502(d)
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A body belt may be used today for which purpose?
- a.Positioning or restraint, but not fall arrest✓
- b.Fall arrest as the primary system when working away from the edge
- c.No permitted purpose at all
- d.Lifting heavy loads by hand
Under 29 CFR 1926.502(d), body belts are prohibited for fall arrest because they can cause internal injuries and let a worker slip out. They may still be used in positioning device systems. A full-body harness is required for fall arrest.29 CFR 1926.502(d)
Guardrail systems used around holes for passing materials must:
- a.Be left fully open on all sides
- b.Rely on only a warning sign
- c.Never be installed at holes at all provided the weather stays clear under most routine jobsite conditions
- d.Have no more than two removable sides and be closed when not in use✓
Under 29 CFR 1926.502(b), when guardrails are used around holes used to pass materials, no more than two sides may have removable sections, and when not passing materials the hole must be guarded on all unprotected sides. This limits open edges. Workers are protected between transfers.29 CFR 1926.502(b)
Wire rope used as a guardrail top rail must be:
- a.Left plain and difficult to see during the earlier phases of work
- b.Coated heavily with waste oil
- c.Flagged at least every 6 feet with high-visibility material✓
- d.Removed entirely during the day
Under 29 CFR 1926.502(b), when wire rope is used for top rails it must be flagged at least every 6 feet with high-visibility material and resist 200 pounds. Flagging makes the rope visible. It must maintain the required height under load.29 CFR 1926.502(b)
How many workers may be attached to a single vertical lifeline at one time?
- a.As many as can physically fit as long as the tools look intact
- b.One worker per vertical lifeline✓
- c.Two workers to share the load
- d.Up to five workers at once
Under 29 CFR 1926.502(d), each worker must be attached to a separate vertical lifeline unless the system is specifically engineered for more. If one worker falls, a shared line could jeopardize others. Independent lines protect each worker.29 CFR 1926.502(d)
Guardrail systems must be surfaced to prevent which secondary hazard?
- a.Chemical liquid spills
- b.Loud grinding noises
- c.Fires started by friction for most residential-scale jobs
- d.Punctures, lacerations, and snagged clothing✓
Under 29 CFR 1926.502(b), guardrail systems must be built so they do not cause punctures or lacerations or snag clothing, and rail ends must not overhang terminal posts. Smooth surfaces prevent injuries when workers contact the rail. This detail improves usability.29 CFR 1926.502(b)