OSHA 510 PRACTICE UPDATED ACTUAL QUESTIONS AND CORRECT
ANSWERS VERIFIED 2027 EDITION
1. True or False: Workplace injuries and Illnesses can lower morale and increased cost to train
replacement workers
(True) - Workplace Injuries and Illnesses
2. According to "The Act, What is the mission of OSHA?
(Protect American Workers) - To assure safe and healthful working conditions for working men and women
by setting and enforcing standards and by providing training, outreach, education and assistance.
3. True or False: Section 11(C) of the OSH Act States: Employers shall furnish to each employees a place
of employment which are free from recognized hazards?
False - Employees are protected from retaliation for raising workplace health and safety concerns and for
reporting work-related injuries and illnesses with OSHA (Without Fear of Punishment)
4. What is the Horizontal Standard?
Meaning "general" or across the board
5. What is the process CSHO use when conducting and inspection?
1903.7 Present Credentials Opening Conference Walk through Closing conference
6. When calculating incident rate, what does the 200,000 figure in the formula represent?
The 200,000 figure in the formula represents the number of hours (100 employees working 40 hours per
week, 50 weeks) per year would work, and provides the standard base for calculating incidence rates.
7. 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).
8. 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.
9. 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.
10. 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.
11. 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.
1
, 12. 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.
13. 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.
14. 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).
15. 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
16. 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.
17. Define "Type B" soil.
(i) Cohesive soil with an unconfined compressive strength greater than (0.5 tsf but less than 1.5 tsf).
18. True or False: A masonry wall must be braced when it reaches 6 feet in height?
False - 1926.706(b) (All masonry walls over eight feet in height shall be adequately braced to prevent
overturning) and to prevent collapse unless the wall is adequately supported so that it will not overturn or
collapse. The bracing shall remain in place until permanent supporting elements of the structure are in
place.
19. True or False: On temporary stairs, handrails must have a minimum clearance of 4 inches?
False - 1926.1052(c)(11) Handrails that will not be a permanent part of the structure being built shall have a
(minimum clearance of 3 inches between the handrail and walls).
20. What are the requirements for a "limited access zone" for masonry construction?
1926.706(a) Equal to the height plus 4 feet.
21. What is the max intended load for self-supporting portable ladders?
1926.1053(a)(1)(i) 4 times the maximum intended load.
22. True or False: During Steel Erection, controlled decking zone can be used as fall protection up to a
maximum height of 50 feet?
False - 1926.760(c) Up to 30 feet
23. In accordance with (IAW) subpart P, appendix B, figure B-1, when performing short-term
excavations, what is the sloped ratio, duration limit, and depth limit when excavating Type A soil?
Simple slope excavations which are open (24 hours or less (short term) and which are 12 feet or less in
depth shall have a maximum allowable slope of ½:1).
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ANSWERS VERIFIED 2027 EDITION
1. True or False: Workplace injuries and Illnesses can lower morale and increased cost to train
replacement workers
(True) - Workplace Injuries and Illnesses
2. According to "The Act, What is the mission of OSHA?
(Protect American Workers) - To assure safe and healthful working conditions for working men and women
by setting and enforcing standards and by providing training, outreach, education and assistance.
3. True or False: Section 11(C) of the OSH Act States: Employers shall furnish to each employees a place
of employment which are free from recognized hazards?
False - Employees are protected from retaliation for raising workplace health and safety concerns and for
reporting work-related injuries and illnesses with OSHA (Without Fear of Punishment)
4. What is the Horizontal Standard?
Meaning "general" or across the board
5. What is the process CSHO use when conducting and inspection?
1903.7 Present Credentials Opening Conference Walk through Closing conference
6. When calculating incident rate, what does the 200,000 figure in the formula represent?
The 200,000 figure in the formula represents the number of hours (100 employees working 40 hours per
week, 50 weeks) per year would work, and provides the standard base for calculating incidence rates.
7. 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).
8. 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.
9. 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.
10. 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.
11. 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.
1
, 12. 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.
13. 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.
14. 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).
15. 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
16. 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.
17. Define "Type B" soil.
(i) Cohesive soil with an unconfined compressive strength greater than (0.5 tsf but less than 1.5 tsf).
18. True or False: A masonry wall must be braced when it reaches 6 feet in height?
False - 1926.706(b) (All masonry walls over eight feet in height shall be adequately braced to prevent
overturning) and to prevent collapse unless the wall is adequately supported so that it will not overturn or
collapse. The bracing shall remain in place until permanent supporting elements of the structure are in
place.
19. True or False: On temporary stairs, handrails must have a minimum clearance of 4 inches?
False - 1926.1052(c)(11) Handrails that will not be a permanent part of the structure being built shall have a
(minimum clearance of 3 inches between the handrail and walls).
20. What are the requirements for a "limited access zone" for masonry construction?
1926.706(a) Equal to the height plus 4 feet.
21. What is the max intended load for self-supporting portable ladders?
1926.1053(a)(1)(i) 4 times the maximum intended load.
22. True or False: During Steel Erection, controlled decking zone can be used as fall protection up to a
maximum height of 50 feet?
False - 1926.760(c) Up to 30 feet
23. In accordance with (IAW) subpart P, appendix B, figure B-1, when performing short-term
excavations, what is the sloped ratio, duration limit, and depth limit when excavating Type A soil?
Simple slope excavations which are open (24 hours or less (short term) and which are 12 feet or less in
depth shall have a maximum allowable slope of ½:1).
2
