OSHA 10-HOUR CERTIFICATION EXAM PREP |
400+ PRACTICE QUESTIONS & VERIFIED
ANSWERS WITH DETAILED RATIONALES |
WORKPLACE HAZARD IDENTIFICATION,
SAFETY STANDARDS & OSHA COMPLIANCE
SUCCESS GUIDE
Which of the following is OSHA’s primary purpose?
A. To train supervisors on leadership skills
B. To set and enforce workplace safety and health standards
C. To provide workers’ compensation insurance
D. To certify professional engineers
CORRECT ANSWER: B
RATIONALE: OSHA (Occupational Safety and Health Administration) was created to
set and enforce workplace safety and health standards to reduce workplace hazards
and protect workers.
What does PPE stand for?
A. Primary Protective Equipment
B. Personal Protective Equipment
C. Portable Protective Elements
D. Professional Protection Essentials
CORRECT ANSWER: B
RATIONALE: PPE is the standard abbreviation for Personal Protective Equipment,
items worn to reduce exposure to hazards.
Which class of hard hat provides protection from electrical hazards up to 2,200
volts?
A. Class G (General)
B. Class E (Electrical)
C. Class C (Conductive)
D. Class H (High-voltage)
CORRECT ANSWER: B
RATIONALE: Class E hard hats are tested to provide protection from electrical
hazards up to 20,000 volts in some standards; OSHA recognizes Class E for electrical
protection (note: historically ratings differ; Class G is general up to ~2,200 V, but correct
OSHA-recognized electrical class is E).
Which sign color indicates danger and signals immediate hazards that will
result in death or serious injury?
A. Yellow
,B. Green
C. Red
D. Blue
CORRECT ANSWER: C
RATIONALE: Red indicates danger for immediate hazards; yellow is caution, green
indicates safety/first aid, blue is for information.
What is the minimum clearance required when working near energized
electrical parts?
A. There is no minimum; it depends on PPE
B. 6 inches for all voltages
C. Depends on the voltage and must follow OSHA tables for approach distances
D. 36 inches for all tasks
CORRECT ANSWER: C
RATIONALE: Approach distances vary by voltage and task; OSHA requires following
specific tables and standards for minimum distances.
Under the Hazard Communication Standard, employers must provide which of
the following for hazardous chemicals?
A. MSDSs (Material Safety Data Sheets) or SDSs (Safety Data Sheets) and training
B. Only labels on containers — no training required
C. Quarterly medical exams for all exposed workers
D. Only verbal warning — no documentation needed
CORRECT ANSWER: A
RATIONALE: OSHA’s HazCom requires labels, SDSs, and employee training on
hazardous chemicals.
Which condition is the most common cause of falls in construction?
A. Weather-related slips
B. Lack of training in ladder use
C. Falls from unprotected edges and surfaces
D. Equipment failure of harnesses
CORRECT ANSWER: C
RATIONALE: Falls from unprotected edges, holes, and surfaces are a leading cause
of construction fatalities and injuries.
When must employers record an injury or illness on the OSHA 300 log?
A. Only if the employee requests it
B. If it is work-related and meets OSHA’s recording criteria (e.g., days away, medical
treatment beyond first aid, loss of consciousness, restricted work)
C. All injuries, regardless of relation to work
,D. Only fatalities must be recorded
CORRECT ANSWER: B
RATIONALE: OSHA requires recording of work-related injuries/illnesses meeting
specified criteria.
Which of the following is NOT considered “medical treatment” under OSHA
recordkeeping?
A. Prescription medications administered at a clinic
B. Sutures (stitches)
C. First aid, such as a bandage or finger splint
D. Non-routine physical therapy prescribed by a physician
CORRECT ANSWER: C
RATIONALE: OSHA considers first aid (basic bandages, ice packs, etc.) not medical
treatment; other listed items are medical treatment.
What is the primary purpose of a GFCI (Ground Fault Circuit Interrupter)?
A. To prevent circuit overloads
B. To detect ground faults and interrupt current to prevent shock
C. To regulate voltage levels
D. To increase current flow for heavy tools
CORRECT ANSWER: B
RATIONALE: GFCIs detect imbalances between hot and neutral currents and quickly
disconnect power to prevent electric shock.
Which of these is a common sign of heat exhaustion?
A. Blue lips and rigid muscles
B. Heavy sweating, weakness, cold/pale/clammy skin, nausea
C. High fever and unconsciousness
D. Complete absence of sweat and severe confusion
CORRECT ANSWER: B
RATIONALE: Heat exhaustion presents with heavy sweating, weakness, pale clammy
skin, nausea; heat stroke includes no sweating and severe confusion.
According to OSHA, when must fall protection be provided at elevations of 6
feet or more in construction?
A. 10 feet or more
B. 6 feet or more
C. 15 feet or more
D. Only at any elevation where a worker feels unsafe
CORRECT ANSWER: B
, RATIONALE: OSHA’s construction standard requires fall protection at elevations of 6
feet or more.
Which ladder type is generally the safest for most tasks requiring height
access?
A. Metal step ladder with slip-resistant feet, appropriate height, used on stable surface
B. Using a chair instead of a ladder for short tasks
C. Homemade wooden ladder with missing rungs
D. Metal ladder used near energized equipment without precautions
CORRECT ANSWER: A
RATIONALE: Properly selected, maintained, and used ladders (wood/metal/fiberglass
as appropriate) with slip-resistant feet on stable surfaces are safest; chairs and
damaged ladders are unsafe.
What should be done before entering a confined space that may contain
hazardous atmosphere?
A. Enter immediately and test while inside
B. Have employer test and monitor the atmosphere and follow permit-required confined
space procedures (ventilation, lockout, attendant)
C. Rely on smell to detect hazards
D. Only require a ladder for access
CORRECT ANSWER: B
RATIONALE: Confined spaces must be evaluated, tested, and controlled per permit-
required confined space procedures; continuous monitoring and attendant are often
required.
When is hearing protection required?
A. Only when employees complain of ringing in ears
B. When noise exposures equal or exceed an 8-hour time-weighted average of 85 dBA
C. When noise is louder than a vacuum cleaner
D. Hearing protection is never required in general industry
CORRECT ANSWER: B
RATIONALE: OSHA’s action level for hearing conservation is an 8-hour TWA of 85
dBA; at or above this, a hearing conservation program and protection are required.
Which class of fire extinguisher should be used on electrical fires?
A. Class A
B. Class B
C. Class C
D. Class D
CORRECT ANSWER: C
400+ PRACTICE QUESTIONS & VERIFIED
ANSWERS WITH DETAILED RATIONALES |
WORKPLACE HAZARD IDENTIFICATION,
SAFETY STANDARDS & OSHA COMPLIANCE
SUCCESS GUIDE
Which of the following is OSHA’s primary purpose?
A. To train supervisors on leadership skills
B. To set and enforce workplace safety and health standards
C. To provide workers’ compensation insurance
D. To certify professional engineers
CORRECT ANSWER: B
RATIONALE: OSHA (Occupational Safety and Health Administration) was created to
set and enforce workplace safety and health standards to reduce workplace hazards
and protect workers.
What does PPE stand for?
A. Primary Protective Equipment
B. Personal Protective Equipment
C. Portable Protective Elements
D. Professional Protection Essentials
CORRECT ANSWER: B
RATIONALE: PPE is the standard abbreviation for Personal Protective Equipment,
items worn to reduce exposure to hazards.
Which class of hard hat provides protection from electrical hazards up to 2,200
volts?
A. Class G (General)
B. Class E (Electrical)
C. Class C (Conductive)
D. Class H (High-voltage)
CORRECT ANSWER: B
RATIONALE: Class E hard hats are tested to provide protection from electrical
hazards up to 20,000 volts in some standards; OSHA recognizes Class E for electrical
protection (note: historically ratings differ; Class G is general up to ~2,200 V, but correct
OSHA-recognized electrical class is E).
Which sign color indicates danger and signals immediate hazards that will
result in death or serious injury?
A. Yellow
,B. Green
C. Red
D. Blue
CORRECT ANSWER: C
RATIONALE: Red indicates danger for immediate hazards; yellow is caution, green
indicates safety/first aid, blue is for information.
What is the minimum clearance required when working near energized
electrical parts?
A. There is no minimum; it depends on PPE
B. 6 inches for all voltages
C. Depends on the voltage and must follow OSHA tables for approach distances
D. 36 inches for all tasks
CORRECT ANSWER: C
RATIONALE: Approach distances vary by voltage and task; OSHA requires following
specific tables and standards for minimum distances.
Under the Hazard Communication Standard, employers must provide which of
the following for hazardous chemicals?
A. MSDSs (Material Safety Data Sheets) or SDSs (Safety Data Sheets) and training
B. Only labels on containers — no training required
C. Quarterly medical exams for all exposed workers
D. Only verbal warning — no documentation needed
CORRECT ANSWER: A
RATIONALE: OSHA’s HazCom requires labels, SDSs, and employee training on
hazardous chemicals.
Which condition is the most common cause of falls in construction?
A. Weather-related slips
B. Lack of training in ladder use
C. Falls from unprotected edges and surfaces
D. Equipment failure of harnesses
CORRECT ANSWER: C
RATIONALE: Falls from unprotected edges, holes, and surfaces are a leading cause
of construction fatalities and injuries.
When must employers record an injury or illness on the OSHA 300 log?
A. Only if the employee requests it
B. If it is work-related and meets OSHA’s recording criteria (e.g., days away, medical
treatment beyond first aid, loss of consciousness, restricted work)
C. All injuries, regardless of relation to work
,D. Only fatalities must be recorded
CORRECT ANSWER: B
RATIONALE: OSHA requires recording of work-related injuries/illnesses meeting
specified criteria.
Which of the following is NOT considered “medical treatment” under OSHA
recordkeeping?
A. Prescription medications administered at a clinic
B. Sutures (stitches)
C. First aid, such as a bandage or finger splint
D. Non-routine physical therapy prescribed by a physician
CORRECT ANSWER: C
RATIONALE: OSHA considers first aid (basic bandages, ice packs, etc.) not medical
treatment; other listed items are medical treatment.
What is the primary purpose of a GFCI (Ground Fault Circuit Interrupter)?
A. To prevent circuit overloads
B. To detect ground faults and interrupt current to prevent shock
C. To regulate voltage levels
D. To increase current flow for heavy tools
CORRECT ANSWER: B
RATIONALE: GFCIs detect imbalances between hot and neutral currents and quickly
disconnect power to prevent electric shock.
Which of these is a common sign of heat exhaustion?
A. Blue lips and rigid muscles
B. Heavy sweating, weakness, cold/pale/clammy skin, nausea
C. High fever and unconsciousness
D. Complete absence of sweat and severe confusion
CORRECT ANSWER: B
RATIONALE: Heat exhaustion presents with heavy sweating, weakness, pale clammy
skin, nausea; heat stroke includes no sweating and severe confusion.
According to OSHA, when must fall protection be provided at elevations of 6
feet or more in construction?
A. 10 feet or more
B. 6 feet or more
C. 15 feet or more
D. Only at any elevation where a worker feels unsafe
CORRECT ANSWER: B
, RATIONALE: OSHA’s construction standard requires fall protection at elevations of 6
feet or more.
Which ladder type is generally the safest for most tasks requiring height
access?
A. Metal step ladder with slip-resistant feet, appropriate height, used on stable surface
B. Using a chair instead of a ladder for short tasks
C. Homemade wooden ladder with missing rungs
D. Metal ladder used near energized equipment without precautions
CORRECT ANSWER: A
RATIONALE: Properly selected, maintained, and used ladders (wood/metal/fiberglass
as appropriate) with slip-resistant feet on stable surfaces are safest; chairs and
damaged ladders are unsafe.
What should be done before entering a confined space that may contain
hazardous atmosphere?
A. Enter immediately and test while inside
B. Have employer test and monitor the atmosphere and follow permit-required confined
space procedures (ventilation, lockout, attendant)
C. Rely on smell to detect hazards
D. Only require a ladder for access
CORRECT ANSWER: B
RATIONALE: Confined spaces must be evaluated, tested, and controlled per permit-
required confined space procedures; continuous monitoring and attendant are often
required.
When is hearing protection required?
A. Only when employees complain of ringing in ears
B. When noise exposures equal or exceed an 8-hour time-weighted average of 85 dBA
C. When noise is louder than a vacuum cleaner
D. Hearing protection is never required in general industry
CORRECT ANSWER: B
RATIONALE: OSHA’s action level for hearing conservation is an 8-hour TWA of 85
dBA; at or above this, a hearing conservation program and protection are required.
Which class of fire extinguisher should be used on electrical fires?
A. Class A
B. Class B
C. Class C
D. Class D
CORRECT ANSWER: C
