OSHA 510 PRACTICE TEST EXAM QUESTIONS WITH
ANSWERS GRADED A+ 2025/2026
How far can a Class (A) fire extinguishers be away from the employees? -
1926.150(c)(1)(i)
A fire extinguisher, rated not less than 2A, shall be provided for each 3,000 square feet
of the protected building area, or major fraction thereof. Travel distance from any point
of the protected area to the nearest fire extinguisher shall not exceed (100 feet).
True or False: Accident prevention signs such as danger, caution and exits signs shall
be visible while working. - True - 1926.200(a)
General signs and symbols required by this subpart shall be (visible) at all times when
work is being performed, and shall be removed or covered promptly when the hazards
no longer exist.
What is the maximum deceleration distance a personal fall arrest system shall bring
employees to a stop? - 1926.502(d)(16)(iv)
bring an employee to a complete stop and limit maximum deceleration distance an
employee travels to (3.5 feet)
True or False: Only hand and power tools purchased by the employer must be
maintained in a safe condition, - False -
1926.300(a)
All hand and power tools and similar equipment, whether furnished by the employer or
the employee, shall be maintained in a safe condition.
IAW subpart C what is the definition of Qualified Person? - 1926.32(m)
"Qualified" means one who, by possession of a recognized degree, certificate, or
professional standing, or who by extensive knowledge, training, and experience, has
successfully demonstrated his ability to solve or resolve problems relating to the subject
matter, the work, or the project.
How do you protect employee and other employees vision in the vicinity during Arc
Welding operations? - 1926.351(e)
("Shielding"). Whenever practicable, all arc welding and cutting operations shall be
shielded by noncombustible or flameproof screens which will protect employees and
other persons working in the vicinity from the direct rays of the arc.
True or False: Failure to inspect oil or grease on regulator fitting, valves or cap threads
on a oxygen cylinder can result in fire or explosion. - True - 1926.350(i)
Oil and grease hazards. Oxygen cylinders and fittings shall be kept away from oil or
grease. Cylinders, cylinder caps and valves, couplings, regulators, hose, and apparatus
shall be kept free from oil or greasy substances and shall not be handled with oily hands
or gloves. Oxygen shall not be directed at oily surfaces, greasy clothes, or within a fuel
oil or other storage tank or vessel.
, How should PFAS be rigged? - 1926.502(d)(16)(v)
have sufficient strength to withstand twice the potential impact energy of an employee
(free falling a distance of 6 feet), or the free fall distance permitted by the system,
whichever is less.
When using mechanical equipment perpendicular from the roof edge, how far away
from the roof edge must warning line be? - 1926.502(f)(1)(ii)
When mechanical equipment is being used, the warning line shall be erected not less
than 6 feet (1.8 m) from the roof edge which is parallel to the direction of mechanical
equipment operation, and not less than (10 feet) from the roof edge which is
perpendicular to the direction of mechanical equipment operation.
Who initiates and maintains accident prevention programs - 1926.20(b)(1)
It shall be the responsibility of the (employer) to initiate and maintain such programs as
may be necessary to comply with this part.
Define Assured Equipment Grounding Conductor program - 1926.404(b)(1)(iii)
Conductor program on construction sites covering all cord sets, receptacles which are
(not a part of the permanent wiring of the building or structure), and equipment
connected by cord and plug.
True or False: When guarding live parts, areas with 45 volts or greater, requires that
only a qualified person (Electrician) have access to protected areas. - False -
1926.403(i)(2)(i)
(50 volts or more shall be guarded).
Define Bonding? - 1926.449
The permanent (joining of metallic parts to form an electrically conductive path) which
will assure electrical continuity and the capacity to conduct safely any current likely to
be imposed.
True or False: When working around Power Transmission & Distribution lines you only
have to give an initial Job briefing at the beginning of the project if the work being
performed is repetitive and similar to other task? - False -
1926.952(c)(1)
At least one before each day or shift.
True or False: A competent person shall supervise the dismantling of scaffolding? -
True - 1926.32(f)
"Competent person" means one who is capable of identifying existing and predictable
hazards in the surroundings or working conditions which are unsanitary, hazardous, or
dangerous to employees, and who has authorization to take prompt corrective
measures to eliminate them
IAW Subpart M, what is the height of a top rail of a guardrail system? - 1926.502(b)(1)
42 inches plus or minus 3 inches.
ANSWERS GRADED A+ 2025/2026
How far can a Class (A) fire extinguishers be away from the employees? -
1926.150(c)(1)(i)
A fire extinguisher, rated not less than 2A, shall be provided for each 3,000 square feet
of the protected building area, or major fraction thereof. Travel distance from any point
of the protected area to the nearest fire extinguisher shall not exceed (100 feet).
True or False: Accident prevention signs such as danger, caution and exits signs shall
be visible while working. - True - 1926.200(a)
General signs and symbols required by this subpart shall be (visible) at all times when
work is being performed, and shall be removed or covered promptly when the hazards
no longer exist.
What is the maximum deceleration distance a personal fall arrest system shall bring
employees to a stop? - 1926.502(d)(16)(iv)
bring an employee to a complete stop and limit maximum deceleration distance an
employee travels to (3.5 feet)
True or False: Only hand and power tools purchased by the employer must be
maintained in a safe condition, - False -
1926.300(a)
All hand and power tools and similar equipment, whether furnished by the employer or
the employee, shall be maintained in a safe condition.
IAW subpart C what is the definition of Qualified Person? - 1926.32(m)
"Qualified" means one who, by possession of a recognized degree, certificate, or
professional standing, or who by extensive knowledge, training, and experience, has
successfully demonstrated his ability to solve or resolve problems relating to the subject
matter, the work, or the project.
How do you protect employee and other employees vision in the vicinity during Arc
Welding operations? - 1926.351(e)
("Shielding"). Whenever practicable, all arc welding and cutting operations shall be
shielded by noncombustible or flameproof screens which will protect employees and
other persons working in the vicinity from the direct rays of the arc.
True or False: Failure to inspect oil or grease on regulator fitting, valves or cap threads
on a oxygen cylinder can result in fire or explosion. - True - 1926.350(i)
Oil and grease hazards. Oxygen cylinders and fittings shall be kept away from oil or
grease. Cylinders, cylinder caps and valves, couplings, regulators, hose, and apparatus
shall be kept free from oil or greasy substances and shall not be handled with oily hands
or gloves. Oxygen shall not be directed at oily surfaces, greasy clothes, or within a fuel
oil or other storage tank or vessel.
, How should PFAS be rigged? - 1926.502(d)(16)(v)
have sufficient strength to withstand twice the potential impact energy of an employee
(free falling a distance of 6 feet), or the free fall distance permitted by the system,
whichever is less.
When using mechanical equipment perpendicular from the roof edge, how far away
from the roof edge must warning line be? - 1926.502(f)(1)(ii)
When mechanical equipment is being used, the warning line shall be erected not less
than 6 feet (1.8 m) from the roof edge which is parallel to the direction of mechanical
equipment operation, and not less than (10 feet) from the roof edge which is
perpendicular to the direction of mechanical equipment operation.
Who initiates and maintains accident prevention programs - 1926.20(b)(1)
It shall be the responsibility of the (employer) to initiate and maintain such programs as
may be necessary to comply with this part.
Define Assured Equipment Grounding Conductor program - 1926.404(b)(1)(iii)
Conductor program on construction sites covering all cord sets, receptacles which are
(not a part of the permanent wiring of the building or structure), and equipment
connected by cord and plug.
True or False: When guarding live parts, areas with 45 volts or greater, requires that
only a qualified person (Electrician) have access to protected areas. - False -
1926.403(i)(2)(i)
(50 volts or more shall be guarded).
Define Bonding? - 1926.449
The permanent (joining of metallic parts to form an electrically conductive path) which
will assure electrical continuity and the capacity to conduct safely any current likely to
be imposed.
True or False: When working around Power Transmission & Distribution lines you only
have to give an initial Job briefing at the beginning of the project if the work being
performed is repetitive and similar to other task? - False -
1926.952(c)(1)
At least one before each day or shift.
True or False: A competent person shall supervise the dismantling of scaffolding? -
True - 1926.32(f)
"Competent person" means one who is capable of identifying existing and predictable
hazards in the surroundings or working conditions which are unsanitary, hazardous, or
dangerous to employees, and who has authorization to take prompt corrective
measures to eliminate them
IAW Subpart M, what is the height of a top rail of a guardrail system? - 1926.502(b)(1)
42 inches plus or minus 3 inches.
