A confined space that also has a hazardous atmosphere requires a:

Permit-required confined space entry program with an entry permit, attendant, and rescue plan

OSHA 10-hour training certification for all entrants

The OSHA Hazard Communication Standard (HazCom) requires employers to ensure workers have access to:

Safety Data Sheets (SDS) for all hazardous chemicals in the workplace

Personal protective equipment at no cost for every task

Contractor License Exam

OSHA Safety Regulations Practice Questions

10 practice questions with detailed explanations — aligned to the Contractor License Exam.

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Contractor License · Question 1 of 5

OSHA's fall protection standard for the construction industry (29 CFR 1926.502) requires fall protection at or above:

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Q1.OSHA's fall protection standard for the construction industry (29 CFR 1926.502) requires fall protection at or above:
A.4 feet
B.6 feet
C.8 feet
D.10 feet
✓B. 6 feet
Explanation: OSHA 29 CFR 1926.502 requires fall protection for employees working at heights of 6 feet or more above a lower level in the construction industry. Fall protection includes guardrail systems, safety nets, or personal fall arrest systems.
Q2.A confined space that also has a hazardous atmosphere requires a:
A.Competent person inspection
B.Permit-required confined space entry program with an entry permit, attendant, and rescue plan
C.OSHA 10-hour training certification for all entrants
D.Daily atmospheric testing only
✓B. Permit-required confined space entry program with an entry permit, attendant, and rescue plan
Explanation: A confined space with hazardous atmosphere (or other serious hazards) is a permit-required confined space (PRCS) under OSHA 29 CFR 1910.146/1926.1200. Entry requires a written permit, trained attendant, entrant, entry supervisor, and rescue plan.
Q3.The OSHA Hazard Communication Standard (HazCom) requires employers to ensure workers have access to:
A.Weekly safety meetings
B.Safety Data Sheets (SDS) for all hazardous chemicals in the workplace
C.Annual physical examinations
D.Personal protective equipment at no cost for every task
✓B. Safety Data Sheets (SDS) for all hazardous chemicals in the workplace
Explanation: OSHA's HazCom Standard (29 CFR 1910.1200) requires employers to maintain Safety Data Sheets (SDS) for all hazardous chemicals, label containers, and provide training on chemical hazards. Employees must have immediate access to SDS.
Q4.Excavations 5 feet deep or greater require either a protective system or:
A.A written engineered plan only
B.Daily inspections by the authority having jurisdiction
C.A competent person's determination that no cave-in potential exists (very stable rock)
D.An OSHA permit
✓C. A competent person's determination that no cave-in potential exists (very stable rock)
Explanation: OSHA 29 CFR 1926.652 requires protective systems (sloping, shoring, or shielding) for excavations 5 feet or deeper, unless a competent person determines the excavation is in stable rock. Excavations deeper than 20 feet require an engineer-designed system.
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Q5.OSHA's electrical safety standard requires that Ground Fault Circuit Interrupters (GFCIs) be used:
A.Only in bathrooms and kitchens
B.For all temporary wiring at construction sites
C.Only when working in wet conditions
D.Only for power tools rated above 15 amps
✓B. For all temporary wiring at construction sites
Explanation: OSHA 29 CFR 1926.404 requires GFCI protection for all 120-volt, single-phase, 15- and 20-amp receptacles used in construction. Contractors may use an Assured Equipment Grounding Conductor Program (AEGCP) as an alternative.
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Q6.A 'competent person' in OSHA construction standards is someone who:
A.Has completed the OSHA 30-hour construction training course
B.Is capable of identifying existing and predictable hazards and has authority to take corrective action
C.Holds a professional engineer (PE) license
D.Has worked in construction for at least 5 years
✓B. Is capable of identifying existing and predictable hazards and has authority to take corrective action
Explanation: OSHA defines a 'competent person' as one who is capable of identifying hazardous or dangerous conditions in a specific area AND has the authority to take prompt corrective measures. OSHA 30 training alone does not make someone a competent person.
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Q7.Scaffolding must be inspected by a competent person:
A.Only at initial erection
B.Before each work shift and after any event that could affect its integrity
C.Weekly during use
D.Only after it exceeds 10 feet in height
✓B. Before each work shift and after any event that could affect its integrity
Explanation: OSHA 29 CFR 1926.451 requires scaffolding to be inspected by a competent person before each work shift and after any occurrence that could affect the structural integrity, such as high winds or altered conditions.
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Q8.OSHA's Lockout/Tagout (LOTO) standard applies to:
A.All electrical work on construction sites
B.Service and maintenance of machines and equipment where unexpected energization could injure workers
C.Only work on equipment rated above 480 volts
D.All confined space entries
✓B. Service and maintenance of machines and equipment where unexpected energization could injure workers
Explanation: OSHA's LOTO standard (29 CFR 1910.147) applies to servicing and maintenance activities where unexpected energization (electrical, hydraulic, pneumatic, thermal, gravitational) could cause injury. It does not cover normal construction operations.
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Q9.An OSHA recordable injury or illness must be recorded on the OSHA 300 log if it results in:
A.Any first aid treatment at the worksite
B.Medical treatment beyond first aid, days away from work, restricted work activity, or loss of consciousness
C.Any visit to a doctor regardless of treatment
D.Any minor cut or bruise
✓B. Medical treatment beyond first aid, days away from work, restricted work activity, or loss of consciousness
Explanation: An injury or illness is OSHA recordable if it results in death, days away from work, restricted work or job transfer, medical treatment beyond first aid, loss of consciousness, or a significant injury diagnosed by a healthcare professional.
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Q10.The OSHA 'Fatal Four' in construction — the four hazards responsible for the most worker deaths — are:
A.Electrical, chemical, fire, and equipment
B.Falls, struck-by, caught-in/between, and electrocution
C.Trench collapse, scaffolding failure, crane collapse, and explosions
D.Heat stroke, back injuries, forklift accidents, and chemical burns
✓B. Falls, struck-by, caught-in/between, and electrocution
Explanation: OSHA's 'Fatal Four' are the leading causes of construction worker deaths: Falls (~38%), Struck-by (~10%), Caught-in/between (~2%), and Electrocution (~9%). Eliminating these hazards would save over 600 lives per year.
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