100+ Free OSHA 30 Construction Practice Questions

Pass your OSHA 30-Hour Construction Safety Certification exam on the first try — instant access, no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately

Approximately 85%+ with adequate preparation Pass Rate

100+ Questions

100% Free

1 / 100

Question 1

Score: 0/0

What health hazards are associated with lead exposure in construction?

Only respiratory irritation

Neurological damage, kidney disease, reproductive harm, high blood pressure, and anemia

Only minor skin irritation

Temporary hearing loss

to track

Same family resources

Explore More OSHA Training

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

OSHA 30

Practice Questions200 questions Flashcards50 cards

3 blogs

OSHA 10-Hour Construction Safety

Practice Questions100 questions

More From This Family

Videos and articles for deeper review.

ArticleBest ANSI Z87.1 Safety Glasses for Construction Trades: 2026 Buying Guide12 min read ArticleBest Hard Hats for Construction Workers: ANSI Z89.1 Compliant Picks for 202612 min read ArticleBest High-Visibility Safety Vests for Construction, CDL & OSHA 30 in 202612 min read

2026 Statistics

Key Facts: OSHA 30 Construction Exam

100

Practice Questions

Free on OpenExamPrep

30 hrs

Course Duration

DOL requirement

Content Domains

Supervisor-level coverage

$50-200

Course Cost

Varies by provider

Card Expiration

Valid for life

60%

Focus Four Fatalities

Falls, struck-by, caught-in, electrocution

The OSHA 30-Hour Construction course builds on the 10-Hour curriculum with advanced topics including safety management systems, accident investigation, crane operations, confined space entry, ergonomics, and health hazard management. It covers all Focus Four hazards in greater depth and adds supervisor-level responsibilities. The DOL card does not expire. The 30-Hour course is typically required for construction supervisors, foremen, and project managers.

Sample OSHA 30 Construction Practice Questions

Try these sample questions to test your OSHA 30 Construction exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What is the primary purpose of a safety management system (SMS) on a construction site?

A.To track employee time and attendance

B.To systematically identify, assess, and control workplace hazards through continuous improvement

C.To manage project budgets and costs

D.To schedule equipment deliveries

Explanation: A safety management system (SMS) is a systematic approach to managing workplace safety that includes organizational structures, planning activities, responsibilities, practices, procedures, processes, and resources. An effective SMS integrates safety into all business operations and creates a culture of continuous improvement in hazard identification, risk assessment, and control implementation.

2At what height does OSHA require fall protection for construction workers?

A.4 feet

B.6 feet

C.10 feet

D.15 feet

Explanation: OSHA 29 CFR 1926.501(b)(1) requires fall protection for construction workers at heights of 6 feet or more above a lower level. This applies to all construction activities unless a specific standard provides different requirements (such as steel erection at 15 feet). Fall protection methods include guardrails, safety nets, and personal fall arrest systems.

3What are the 'Focus Four' hazards that cause the most construction fatalities?

A.Heat, cold, noise, and vibration

B.Falls, struck-by, caught-in/between, and electrocution

C.Fire, flood, earthquake, and tornado

D.Chemicals, radiation, dust, and fumes

Explanation: OSHA's Focus Four hazards — falls, struck-by, caught-in/between, and electrocution — account for approximately 60% of all construction worker fatalities each year. The OSHA 30-Hour Construction course provides in-depth coverage of each hazard category. Falls consistently rank as the leading cause of construction deaths, followed by struck-by, electrocution, and caught-in/between.

4What is a Ground Fault Circuit Interrupter (GFCI) designed to protect against?

A.Overloaded circuits

B.Ground faults that could cause electrocution

C.Power surges from lightning

D.Short circuits in motor windings

Explanation: A GFCI monitors the electrical current flowing through the hot and neutral conductors. If it detects a current imbalance of 5 milliamps or more (indicating current is leaking through an unintended path such as a person's body to ground), it trips within 1/40th of a second to prevent electrocution. OSHA requires GFCI protection on all temporary 120V outlets on construction sites.

5What is the hierarchy of controls for workplace hazards, listed from most to least effective?

A.PPE, engineering controls, elimination

B.Elimination, substitution, engineering controls, administrative controls, PPE

C.Administrative controls, PPE, elimination

D.PPE, substitution, elimination, engineering controls

Explanation: The hierarchy of controls ranks hazard control methods from most to least effective: (1) Elimination — remove the hazard, (2) Substitution — replace with something less hazardous, (3) Engineering controls — isolate workers from the hazard, (4) Administrative controls — change work procedures, and (5) PPE — protect the individual worker. Higher-level controls are preferred because they don't rely on worker behavior.

6What must be provided when an excavation is 4 feet or deeper?

A.Hard hats for all workers in the area

B.A safe means of access and egress within 25 feet of lateral travel

C.Only a warning tape at the edge

D.Shoring on all four sides

Explanation: OSHA requires a safe means of access and egress (ladder, stairway, or ramp) for excavations 4 feet deep or more. These access points must be located so that no worker has to travel more than 25 feet laterally to reach one. Additionally, excavations 5 feet or deeper require cave-in protection unless the excavation is in stable rock.

7What is a 'competent person' as defined by OSHA?

A.Any worker with a college degree

B.Someone designated by the employer who can identify hazards and has authority to take corrective action

C.A person who has passed the OSHA 30-hour course

D.The project owner

Explanation: OSHA defines a competent person as one who is capable of identifying existing and predictable hazards in the surroundings or working conditions that are hazardous or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them. Many OSHA standards specifically require a competent person for activities like excavation, scaffolding, crane operations, and fall protection planning.

8What is the minimum distance workers must maintain from overhead power lines rated at 50 kV or less?

A.5 feet

B.10 feet

C.15 feet

D.20 feet

Explanation: OSHA requires a minimum clearance of 10 feet from overhead power lines rated at 50 kV or less for workers and non-insulated equipment. For lines rated over 50 kV, clearance increases by 4 inches for every 10 kV over 50 kV. Contact with overhead power lines is a leading cause of electrocution in construction. When closer proximity is required, the lines must be de-energized or insulating barriers must be installed.

9What does a Safety Data Sheet (SDS) provide?

A.Employee contact information

B.Detailed information about a chemical's hazards, safe handling, storage, and emergency procedures

C.Building evacuation routes

D.Equipment maintenance schedules

Explanation: A Safety Data Sheet (SDS) provides comprehensive information about a hazardous chemical in 16 standardized sections including identification, hazard classification, composition, first-aid measures, fire-fighting measures, handling and storage, exposure controls, and disposal considerations. Under OSHA's Hazard Communication Standard (HazCom/GHS), employers must maintain SDSs for all hazardous chemicals and make them accessible to workers.

10When must scaffolding be inspected on a construction site?

A.Weekly by management

B.Before each work shift by a competent person and after any event affecting structural integrity

C.Monthly by an OSHA inspector

D.Only when first erected

Explanation: OSHA requires that scaffolding be inspected by a competent person before each work shift and after any occurrence (such as high winds, storms, or impacts) that could affect the scaffold's structural integrity. The competent person must verify that all components — planking, guardrails, bracing, base plates, and tie-ins — are in safe condition before workers are permitted to use the scaffold.

About the OSHA 30 Construction Exam

The OSHA 30-Hour Construction Safety course is supervisor-level safety training that provides comprehensive coverage of construction hazards, safety management, accident investigation, and specialized topics including crane safety, confined spaces, and ergonomics. Often required for site supervisors and foremen.

Assessment

Module-based assessment with comprehensive final exam

Time Limit

30-hour course with final assessment

Passing Score

70% (varies by provider)

Exam Fee

$50-200 (varies by provider) (OSHA (Occupational Safety and Health Administration))

OSHA 30 Construction Exam Content Outline

15%

Safety Management

Safety management systems, safety culture, leading/lagging indicators, multi-employer policies, worker rights, and emergency planning

12%

Fall Protection

Fall protection planning, guardrails, PFAS, safety nets, controlled access zones, steel erection, and roofing requirements

10%

Electrical Safety

GFCI, lockout/tagout, arc flash, power line clearance, energy control programs, and qualified worker requirements

10%

Scaffolding Safety

Scaffold types, suspended scaffolds, load capacity, training requirements, cross-bracing, and scaffold erection safety

Excavation Safety

Soil classification, sloping ratios, shoring/shielding, access requirements, and equipment near excavations

10%

Crane Safety

Operator certification, lift planning, load charts, safety devices, tandem lifts, and tower crane requirements

Confined Spaces

Permit-required confined spaces, atmospheric testing, entry permits, attendant duties, and rescue planning

10%

Accident Investigation

Root cause analysis, investigation methodology, near-miss investigation, corrective actions, and accident causation models

10%

Health Hazards

Silica, lead, asbestos, noise exposure, biological hazards, thermal stress, and medical surveillance

Ergonomics

Ergonomic risk factors, manual lifting, vibration hazards, overhead work, and musculoskeletal disorder prevention

How to Pass the OSHA 30 Construction Exam

What You Need to Know

Passing score: 70% (varies by provider)
Assessment: Module-based assessment with comprehensive final exam
Time limit: 30-hour course with final assessment
Exam fee: $50-200 (varies by provider)

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

OSHA 30 Construction Study Tips from Top Performers

1Master safety management concepts — understand leading vs. lagging indicators, the hierarchy of controls, and the multi-employer citation policy

2Study accident investigation methodology — root cause analysis, the 5 Whys technique, and the Swiss cheese model of accident causation

3Know crane safety requirements — operator certification, load charts, critical lift planning, and safety devices (LMI, A2B)

4Understand confined space entry requirements — atmospheric testing order (O2, flammability, toxicity), permit elements, and attendant duties

5Review ergonomic risk factors in construction — manual lifting, vibration hazards, overhead work, and repetitive motion prevention

Frequently Asked Questions

What is the OSHA 30-Hour Construction course?

The OSHA 30-Hour Construction course is a comprehensive, supervisor-level safety training program that covers construction hazard recognition, avoidance, and prevention in depth. It includes all topics from the OSHA 10-Hour course plus advanced topics like safety management, accident investigation, crane safety, confined spaces, ergonomics, and health hazards. Upon completion, workers receive a U.S. Department of Labor (DOL) 30-Hour card.

Who should take the OSHA 30-Hour course?

The OSHA 30-Hour course is designed for construction supervisors, foremen, project managers, safety professionals, and anyone with safety oversight responsibilities. Many employers require it for personnel in supervisory roles. Some states and cities mandate it for specific construction roles. It is also valuable for workers seeking career advancement into supervisory positions.

What is the difference between OSHA 10 and OSHA 30?

The OSHA 10-Hour course covers basic hazard recognition for entry-level workers. The 30-Hour course covers all 10-Hour topics in greater depth plus additional supervisor-level topics including safety management systems, accident investigation, crane operations, confined space entry, ergonomics, health hazard management, and multi-employer worksite policies. The 30-Hour course takes 3-4 days in a classroom setting.

Can I take the OSHA 30-Hour course online?

Yes, the OSHA 30-Hour Construction course is available online through OSHA-authorized training providers. Online courses must meet the same content and trainer requirements as in-person courses. The course cannot be completed in less than 30 hours, and most providers spread it over several days. A DOL card is mailed upon successful completion.

Does the OSHA 30-Hour card expire?

No, the OSHA 30-Hour DOL card does not expire. However, some employers and jurisdictions may require periodic refresher training. OSHA recommends staying current with safety knowledge and updates to standards. Some industries require annual safety training updates regardless of OSHA card status.

How much does the OSHA 30-Hour course cost?

The OSHA 30-Hour Construction course typically costs $50-200 depending on the provider and delivery method. Online courses tend to be $50-100, while in-person classroom courses may cost $100-200. Some providers include study materials and the DOL card in the course fee. Many employers pay for their supervisors' training.