OSHA 510 Exam Flashcards

Q: What is the OSHA 510 pass rate?

OSHA does not publish a pass rate for the #510 course. Each OTI Education Center administers and grades its own written final exam pass/fail rather than by numeric score. Completion also requires 100% attendance across the 4-day (~32-hour) course — missing any session disqualifies a student from receiving a completion certificate regardless of exam performance.

Q: How many questions are on the OSHA 510 final exam?

The number of questions is not standardized OSHA-wide — it varies by OTI Education Center, since each center develops and grades its own written final exam covering 29 CFR 1926 construction standards. There is no published national question count or passing percentage; the exam is evaluated pass/fail.

Q: What is OSHA 510 a prerequisite for?

OSHA #510 is the primary prerequisite for OSHA #500 — Trainer Course in OSHA Standards for the Construction Industry. Completing OSHA #500 authorizes graduates to conduct OSHA 10-Hour and 30-Hour Construction outreach training under OSHA's Outreach Training Program.

Q: How much does OSHA 510 cost and how long does it take?

OSHA 510 tuition typically ranges from $800 to $1,500, varying by OTI Education Center, and does not include travel or lodging. The course runs 4 days (approximately 32 contact hours) and requires 100% attendance plus a passing final exam for completion documentation.

Q: What is the difference between OSHA 510 and OSHA 511?

OSHA #510 covers construction industry standards (29 CFR 1926) and is the prerequisite for OSHA #500 (construction trainer course). OSHA #511 covers general industry standards (29 CFR 1910) and is the prerequisite for OSHA #501 (general industry trainer course). Some safety professionals complete both to become authorized trainers in both sectors.

Q: What are the Focus Four hazards covered on OSHA 510?

The Focus Four are falls, struck-by, caught-in/between, and electrocution hazards, which together cause roughly 60% of construction worker fatalities annually. OSHA 510 dedicates substantial course time to each category under 29 CFR 1926, since they are the leading causes of death addressed by OSHA's Outreach Training Program.

Question 1

OSHA #510 Course

Accepted Answer

An OTI Education Center course providing an in-depth review of 29 CFR 1926 construction standards, OSHA policy, and the Focus Four hazards. Runs 4 days (~32 contact hours); requires 100% attendance and a passing final exam. Primary prerequisite for OSHA #500 (Trainer Course), which authorizes conducting OSHA 10-Hour/30-Hour Construction outreach training.

Question 2

OSH Act of 1970 — Purpose

Accepted Answer

Assures safe and healthful working conditions for working men and women by authorizing enforcement of standards developed under the Act, assisting states, and providing research, information, education, and training in occupational safety and health (29 USC 651).

Question 3

General Duty Clause — Section 5(a)(1)

Accepted Answer

Requires each employer to furnish a workplace free from recognized hazards that are causing or likely to cause death or serious physical harm. Used to address serious hazards not covered by a specific OSHA standard; the hazard must be recognized, serious, and feasible to correct.

Question 4

29 CFR 1926 vs. 1910 vs. 1904

Accepted Answer

29 CFR 1926 = construction industry safety standards (OSHA 510's focus). 29 CFR 1910 = general industry standards. 29 CFR 1904 = recordkeeping and injury/illness reporting rules that apply across industries.

Question 5

Multi-Employer Citation Policy

Accepted Answer

OSHA can cite any of four employer roles: Creating employer (caused the hazard), Exposing employer (its own workers are exposed), Correcting employer (responsible for fixing it), and Controlling employer (general site-safety authority, typically the GC — must exercise reasonable care to detect and prevent hazards across the whole site, including subcontractor areas).

Question 6

Competent Person vs. Qualified Person

Accepted Answer

Competent person (29 CFR 1926.32(f)): can identify existing/predictable hazards and has authority to take prompt corrective action (e.g., daily scaffold or excavation inspections). Qualified person (1926.32(m)): holds a recognized degree, certificate, or extensive training/experience to solve technical problems (e.g., designs a fall-protection anchor point).

Question 7

Hierarchy of Controls

Accepted Answer

From most to least effective: Elimination → Substitution → Engineering controls → Administrative controls → PPE. Higher levels are preferred because they don't depend on worker behavior; PPE is the last resort, used when higher controls can't fully eliminate the hazard.

Question 8

OSHA Civil Penalty Structure

Accepted Answer

Other-Than-Serious and Serious violations: up to $16,550 per violation. Willful or Repeated: up to $165,514 per violation. Failure to Abate: up to $16,550 per day beyond the abatement date. A willful violation that causes a worker's death can also bring criminal prosecution (up to 6 months imprisonment, doubled on a second conviction).

Question 9

Imminent Danger & OSHA Inspection Rights

Accepted Answer

Imminent danger (OSH Act Section 13): conditions that could cause death or serious harm before normal enforcement could eliminate them — OSHA's highest inspection priority. Under Section 8, workers may have a walkaround representative accompany the inspector; under Marshall v. Barlow's, Inc. (1978), employers may require an administrative search warrant before allowing entry.

Question 10

Fall Protection Trigger — General Construction

Accepted Answer

Employers must provide fall protection when workers are exposed to a fall of 6 feet or more to a lower level (29 CFR 1926.501(b)(1), Subpart M). This baseline construction trigger differs from general industry's 4-foot trigger and steel erection's 15-foot trigger.

Question 11

Three Primary Fall Protection Methods

Accepted Answer

29 CFR 1926.502 recognizes three primary systems: guardrail systems, safety net systems, and personal fall arrest systems (PFAS). A warning line system used alone does not satisfy the standard — it must be paired with a safety monitor or other fall protection.

Question 12

Guardrail System Specifications

Accepted Answer

Top rail: 42 inches (± 3 inches) above the walking/working surface, must withstand 200 lbs applied outward or downward. Mid-rail: approximately 21 inches (halfway between top rail and surface). Toeboards (minimum 3.5 inches) required when tools or materials could fall on workers below (29 CFR 1926.502(b)).

Question 13

PFAS Requirements

Accepted Answer

A personal fall arrest system must limit free fall to 6 feet, limit maximum arresting force on the body to 1,800 lbs, and anchor to a point capable of supporting at least 5,000 lbs per attached worker — or be designed by a qualified person with a safety factor of at least 2 (29 CFR 1926.502(d)).

Question 14

Safety Net Requirements

Accepted Answer

Nets must be installed as close as practicable to the work surface and never more than 30 feet below it. They must extend 8 ft (falls up to 5 ft), 10 ft (falls 5–10 ft), or 13 ft (falls over 10 ft) outward from the work edge, and be drop-tested after installation and every 6 months (29 CFR 1926.502(c)).

Question 15

Controlled Access Zone (CAZ)

Accepted Answer

An alternative to guardrails/PFAS for leading-edge and pre-cast concrete work. Defined by a control line placed 6–25 feet back from the leading edge, marked at least every 6 feet with high-visibility flagging; only authorized workers may enter, and a safety monitor must be present (29 CFR 1926.502(e)).

Question 16

Steel Erection Fall Protection Trigger

Accepted Answer

29 CFR 1926.760 (Subpart R) sets a 15-foot fall protection trigger for connectors and controlled decking zone workers — higher than the standard 6-foot rule. Connectors may work without fall protection up to two stories or 30 feet, whichever is less, during initial connecting.

Question 17

Ladder Safety Basics

Accepted Answer

Portable ladders: 4:1 pitch ratio (base out 1 ft per 4 ft of height, ~75°); extend at least 3 feet above the landing. Extension ladder rail overlap: 3 ft (up to 36 ft), 4 ft (36–48 ft), 5 ft (48–60 ft). Fixed ladder rung spacing: maximum 12 inches on center (29 CFR 1926.1053).

Question 18

Ramps, Walkways & Stairways

Accepted Answer

Guardrails are required on unprotected sides/edges of ramps, runways, and walkways 6 feet or more above a lower level (1926.501(b)(4)). Stairways or ladders are required wherever the vertical access change is 19 inches or more (1926.1051).

Question 19

Silica PEL & Action Level

Accepted Answer

29 CFR 1926.1153: PEL = 50 μg/m³ (8-hour TWA); action level = 25 μg/m³. Primary engineering controls are water suppression (wet methods) and local exhaust ventilation attached to tools — required before relying on respirators.

Question 20

Lead in Construction — PEL, Action Level & Removal

Accepted Answer

29 CFR 1926.62: PEL = 50 μg/m³ (8-hour TWA); action level = 30 μg/m³ triggers monitoring and medical surveillance. Workers are removed from lead work at a blood lead level (BLL) of 50 μg/dL and may return only after two consecutive tests below 40 μg/dL.

Question 21

Asbestos PEL & Work Classes

Accepted Answer

29 CFR 1926.1101 (known human carcinogen): PEL = 0.1 f/cc (8-hour TWA); excursion limit = 1.0 f/cc (30 minutes). Four work classes (I–IV); Class I (removal of thermal system insulation/surfacing ACM) is the highest-risk and most stringently controlled.

Question 22

Noise PEL & Hearing Conservation

Accepted Answer

29 CFR 1926.52: PEL = 90 dBA (8-hour TWA), with allowable duration halved for every 5-dBA increase. Action level = 85 dBA TWA, which triggers a hearing conservation program (monitoring, audiometric testing, hearing protectors, training).

Question 23

Hazard Communication (HazCom)

Accepted Answer

29 CFR 1926.59 requires a written hazard communication program, proper container labeling, accessible Safety Data Sheets (SDS) for every hazardous chemical on site, and worker training on chemical hazards and protective measures.

Question 24

Heat Illness Prevention

Accepted Answer

OSHA has no dedicated construction heat standard yet, but employers must protect workers from recognized heat hazards under the General Duty Clause. OSHA's prevention framework: Water, Rest, Shade, and gradual Acclimatization for new or returning workers.

Question 25

Demolition — Engineering Survey & Utilities

Accepted Answer

29 CFR 1926.850(a) requires a competent person's engineering survey of the structure (and adjacent structures) before demolition begins. Under 1926.850(b), all utilities (gas, electric, water, steam, sewer) must be shut off, capped, or otherwise controlled before work starts.

Question 26

Fatality & Serious Injury Reporting Timelines

Accepted Answer

29 CFR 1904.39: work-related fatalities must be reported to OSHA within 8 hours. In-patient hospitalizations, amputations, and losses of an eye must be reported within 24 hours.

Question 27

OSHA 300 Log Requirement

Accepted Answer

29 CFR 1904.1: employers with 11 or more employees must maintain injury/illness records (Forms 300, 300A, 301) unless in a partially exempt low-hazard industry — construction is not exempt. Form 300A (Summary) must be posted February 1–April 30.

Question 28

OSHA Recordable Criteria

Accepted Answer

29 CFR 1904.7: an injury/illness is recordable if it results in death, days away from work, restricted work/job transfer, medical treatment beyond first aid, loss of consciousness, or a significant diagnosis by a healthcare professional. First aid alone is not recordable.

Question 29

OSHA Inspection Priority Order

Accepted Answer

Highest to lowest priority: (1) Imminent danger, (2) catastrophes/fatalities, (3) worker complaints, (4) referrals from other agencies, (5) programmed/planned inspections based on targeting criteria.

Question 30

Crane Inspection Tiers (Subpart CC)

Accepted Answer

Shift inspection: visual check by a competent person before each shift (1926.1412(d)). Annual/comprehensive inspection: by a qualified person at intervals not exceeding 12 months (1926.1412(f)). Records must document items checked, date, inspector, and deficiencies, and be kept for at least 12 months.

Question 31

Crane Operator & Signal Person Qualification

Accepted Answer

Operators must be certified by an accredited body (NCCCO, NCCER, CIC) or an audited employer program (1926.1427). Signal persons must be qualified by a third-party or employer evaluator in the specific signal method used (1926.1428); operator and signal person must agree on one signal system (hand signals, voice, or visual) and use it exclusively during a lift (1926.1419).

Question 32

Excavation Cave-In Protection Trigger

Accepted Answer

29 CFR 1926.652(a)(1): a protective system (sloping, shoring, or shielding) is required for excavations 5 feet or more in depth, unless entirely in stable rock. A safe means of egress (ladder, stairway, or ramp) is required within 25 feet of lateral travel for excavations 4 feet or more deep (1926.651(c)).

Question 33

Soil Classification & Maximum Slopes

Accepted Answer

A competent person classifies soil as Type A (≥1.5 tsf compressive strength, 0.75:1 slope/53°), Type B (1:1 slope/45°), or Type C (least stable, 1.5:1 slope/34°) using field tests (pocket penetrometer, thumb penetration test) — or Stable Rock, which needs no sloping.

Question 34

Protective Systems & Benching

Accepted Answer

Three protective system types under 29 CFR 1926.652: sloping/benching, shoring (timber, hydraulic, or pneumatic), and shielding (trench boxes). Benching cuts walls into horizontal steps and is allowed only in Type A and Type B soil — never Type C.

Question 35

Excavation Inspection & Spoil Piles

Accepted Answer

A competent person must inspect excavations daily, as conditions change, and after rainstorms for cave-in signs, hazardous atmospheres, or other hazards (1926.651(k)). Spoil piles, materials, and equipment must be kept at least 2 feet from the excavation edge (1926.651(j)).

Question 36

Overhead Power Line Clearance — General Construction

Accepted Answer

29 CFR 1926.416: minimum 10-foot clearance from overhead lines rated ≤50 kV; clearance increases 4 inches for every 10 kV above 50 kV. Voltage must be determined and clearance verified before work begins near energized lines.

Question 37

Crane-to-Power-Line Clearance (Subpart CC)

Accepted Answer

29 CFR 1926.1408: minimum 20-foot clearance between any part of a crane (boom, load line, load) and energized lines up to 350 kV; 50-foot clearance for lines above 350 kV — stricter than the general 10-foot rule due to flash-over risk.

Question 38

GFCI Protection

Accepted Answer

A Ground Fault Circuit Interrupter trips when it detects a current imbalance of 5 milliamps or more, within about 1/40 second — preventing electrocution. Required on all 120-volt, single-phase, 15- and 20-amp receptacles on construction sites (1926.404(b)).

Question 39

Grounding & Lockout/Tagout

Accepted Answer

Electrical systems of 50 volts or more must be grounded (1926.403). Construction uses 29 CFR 1926.417 for lockout/tagout of circuits and equipment (the general industry parallel is 1910.147). Qualified electrical worker status requires task-specific hazard training — not just a license or years of experience.

Question 40

Scaffold Load Capacity & Fall Protection Trigger

Accepted Answer

29 CFR 1926.451: scaffolds must support their own weight plus 4 times the maximum intended load (6:1 safety factor for suspension ropes). Fall protection is required at 10 feet — different from the general 6-foot construction trigger.

Question 41

Scaffold Inspection & Stability

Accepted Answer

A competent person must inspect scaffolds before each shift and after any event that could affect structural integrity (1926.451(f)(3)). Freestanding (non-mobile) scaffolds must be tied, guyed, or braced once height exceeds a 4:1 height-to-base ratio; mobile scaffolds at 3:1 (1926.452(w)).

Question 42

Scaffold Erection/Dismantling & Planking

Accepted Answer

During erection and dismantling, a competent person determines whether fall protection is feasible; it must be used where feasible (1926.451(g)(4)). Standard scaffold plank support spacing is 8 feet on center, with planks overhanging supports 6–12 inches.

Question 43

Struck-By Vehicle Hazards

Accepted Answer

Being struck by vehicles and mobile equipment is the leading struck-by fatality cause in construction. Controls include high-visibility apparel (ANSI Class 2/3), spotters, and barricades. Reversing vehicles require an audible alarm distinguishable from ambient noise, or a spotter (1926.602).

Question 44

Nail Gun Safety

Accepted Answer

OSHA requires sequential (single-fire) trigger mode over bump-fire (contact-actuation) mode on pneumatic nail guns. Sequential mode requires the safety tip pressed and then the trigger pulled in sequence, reducing accidental discharges (29 CFR 1926 Subpart I).

Question 45

Rigging Inspection Requirements

Accepted Answer

Rigging equipment must be inspected before each use/shift by a qualified rigger, checking for wear, broken wires, kinks, distortion, and corrosion (29 CFR 1926.251, 1926.1404(r)). Defective rigging must be removed from service immediately.

Question 46

Caught-In/Between Hazard Definition

Accepted Answer

Occurs when a worker is caught, crushed, squeezed, or compressed between objects — e.g., pinned between equipment and a fixed object, clothing caught in unguarded rotating machinery, or buried in a trench cave-in. Machine guarding (1926.300) and excavation protection (Subpart P) are the primary controls.

Question 47

Formwork & Reshoring (Subpart Q)

Accepted Answer

Formwork must be inspected by a competent person before each concrete pour to verify it can support fresh concrete plus construction loads (1926.703). Reshoring is temporary support installed after original formwork/shoring is stripped, before the concrete reaches full design strength.

Question 48

Steel Erection Plan (Subpart R)

Accepted Answer

29 CFR 1926.752 requires the controlling contractor to develop a written, site-specific erection plan before any steel columns are erected, covering erection sequence, crane placement, steel delivery, and safety procedures.

Question 49

PPE Requirements (Subpart E)

Accepted Answer

Employers must assess the workplace for hazards, select appropriate PPE, and provide most required PPE at no cost to workers (exceptions: safety-toe footwear, prescription eyewear, everyday clothing) — 29 CFR 1926 Subpart E.

Question 50

Hot Work — Fire Watch & Extinguishers

Accepted Answer

Welding/cutting in areas with flammable or combustible materials requires a hot work permit, a minimum 10-lb ABC dry chemical extinguisher within reach, and a fire watch during the work and for at least 30 minutes after it ends (1926.352). An oxygen-deficient atmosphere is defined as under 19.5% O2, requiring supplied-air respiratory protection.

Free OSHA 510 Exam Flashcards

Filter by Topic

Jump to Card

About These OSHA 510 Flashcards

Topics Covered

Frequently Asked Questions

OSHA 510 Occupational Safety and Health Standards for Construction

Explore More OSHA Training

OSHA 30

OSHA 30-Hour Construction Safety

OSHA 10-Hour Construction Safety

OSHA 10-Hour General Industry

OSHA 10-Hour Maritime Industry Outreach

OSHA 15-Hour Disaster Site Worker Outreach

More From This Family