MARYLAND OSHA 10 CONSTRUCTION CERTIFICATION
EXAM PRACTICE QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALE 2026/27
90 Questions with Answers and Detailed Rationales
100 PERCENT GUARANTEED PASS
INSTANT DOWNLOAD ANSWERS INCLUDED
IMPORTANCE OF THIS DOCUMENT
This comprehensive examination preparation guide has been meticulously developed to help you succeed in the
MARYLAND OSHA 10 CONSTRUCTION CERTIFICATION EXAM PRACTICE QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS RATIONALE 2026/27. It contains 90 carefully selected questions that
reflect the most current exam content and testing strategies. Each question is accompanied by a correct answer
and a detailed rationale that explains the underlying pathophysiology, pharmacology, or clinical reasoning.
Self-Assessment – Test your knowledge and Exam Preparation – Familiarize yourself with the
identify areas requiring further question format and content
study areas
Concept Reinforcement – Deepen your Confidence Building – Develop test-taking
understanding through strategies and reduce
evidence-based exam anxiety
rationales
Time Management – Practice answering
questions under simulated
exam conditions
Review Summary 90 Questions
Foundations - Application - Maryland OSHA 10 Construction Certification AND Correct PLUS Rationale
2026/27 Occupational Safety AND Health Construction Undergraduate YEAR 3 / Graduate
All answers with rationales
,Table of Contents
Content Area Questions Key Topics
Introduction TO OSHA AND 1-15 Construction, Required, Worker, OSHA S, Exposure
Worker Rights
Walking AND Working 16-30 Construction, Worker, Required, Entry, Exposure
Surfaces
EXIT Routes Emergency 31-45 Construction, Required, OSHA S, System, Worker
Action Plans FIRE Prevention
Plans AND FIRE Protection
Electrical Safety 46-60 Construction, Required, Worker, Standards, Portable
Personal Protective 61-75 Worker, Construction, System, Trench, Portable
Equipment PPE
Hazard Communication 76-90 Construction, Worker, Required, Crane, Capacity
Hazcom
TOTAL 90 All questions include answers and detailed rationales
,Section A - Introduction TO OSHA AND Worker Rights
Q1.
A contractor is planning to use a portable ladder to access a roof 12 feet above the
ground. The ladder is 16 feet long and will be placed at the correct angle. However, the
ladder's top will rest against a window sill that is not stable. What is the most appropriate
course of action?
A. Proceed with the ladder, as the angle is B. Secure the ladder at the top to prevent
correct and the height is within OSHA limits slipping, and ensure the window sill can
support the load
C. Use a different access method, such as a D. Have a worker hold the ladder at the
scaffold or aerial lift, because the window sill bottom to prevent movement
is not a stable support
Correct: C - Use a different access method, such as a scaffold or aerial lift, because the
window sill is not a stable support
Rationale:OSHA requires ladders to be used on stable and level surfaces, and the top must
be supported on a stable surface. A window sill is not a stable support, so using a different
access method is required to prevent falls.
Why the other answers are wrong:
A. Correct angle does not compensate for unstable top support, which OSHA prohibits.
B. Securing the ladder to a window sill does not make it stable; the sill itself is not a secure
anchorage.
D. Having a worker hold the ladder does not address the unstable top support and is not an
acceptable fall protection measure.
Reference: OSHA 29 CFR 1926.1053 - Ladders
Q2.
During a trenching operation, atmospheric testing reveals oxygen levels at 18.5% and the
presence of hydrogen sulfide at 5 ppm. According to OSHA's permit-required confined
space standard, what is the correct classification and required action?
A. The space is not a permit-required B. The space is a permit-required confined
confined space because hydrogen sulfide is space because oxygen is below 19.5%, and
below the PEL, but oxygen is low, so entry requires a permit and continuous
continuous monitoring is needed monitoring
C. The space is a permit-required confined D. The space is a non-permit confined
space only if hydrogen sulfide exceeds the space because the oxygen level is above
PEL, so entry is allowed with air purifying 18%, and hydrogen sulfide is below the
respirators IDLH
Correct: B - The space is a permit-required confined space because oxygen is below
Page 3
, Section A - Introduction TO OSHA AND Worker Rights
19.5%, and entry requires a permit and continuous monitoring
Rationale:OSHA defines a permit-required confined space as having an oxygen
concentration below 19.5% or above 23.5%, or containing a hazardous atmosphere. Here,
oxygen is 18.5%, so it is a permit-required space; entry requires a permit, continuous
monitoring, and other protective measures.
Why the other answers are wrong:
A. Oxygen below 19.5% alone triggers permit-required classification, regardless of hydrogen
sulfide levels.
C. The presence of hydrogen sulfide is not required; low oxygen is sufficient for permit-required
status.
D. Oxygen below 19.5% is not acceptable; the space is permit-required, not non-permit.
Reference: OSHA 29 CFR 1910.146 - Permit-Required Confined Spaces
Q3.
A construction site uses a crane to lift materials. The load chart indicates that at a 50-foot
radius, the crane's capacity is 10,000 pounds. The load being lifted weighs 9,500 pounds,
but the rigging weighs 300 pounds and the hook block weighs 200 pounds. What is the
total load on the crane, and is the lift within capacity?
A. Total load is 9,500 pounds; lift is within B. Total load is 9,800 pounds; lift is within
capacity capacity
C. Total load is 10,000 pounds; lift is at D. Total load is 10,000 pounds; lift is not
maximum capacity within capacity
Correct: D - Total load is 10,000 pounds; lift is not within capacity
Rationale:The total load includes the load, rigging, and hook block: 9,500 + 300 + 200 =
10,000 pounds. The crane's capacity at that radius is 10,000 pounds, but OSHA requires not
exceeding capacity; typically, you must not lift at or above capacity due to safety factors.
Therefore, the lift is not within the safe working load.
Why the other answers are wrong:
A. Omits the weight of rigging and hook block, which must be included in the total load.
B. Omits the hook block weight; total load is 10,000 pounds, not 9,800.
C. Correctly calculates total load but incorrectly assumes that lifting at capacity is acceptable;
OSHA requires a safety margin.
Reference: OSHA 29 CFR 1926.1417 - Cranes and Derricks in Construction: Operator Certification
Q4.
A worker is using a circular saw to cut wood on a construction site. The saw has a
damaged blade guard that does not automatically return to cover the blade. What is the
required action according to OSHA's hand and portable power tools standard?
Page 4
EXAM PRACTICE QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALE 2026/27
90 Questions with Answers and Detailed Rationales
100 PERCENT GUARANTEED PASS
INSTANT DOWNLOAD ANSWERS INCLUDED
IMPORTANCE OF THIS DOCUMENT
This comprehensive examination preparation guide has been meticulously developed to help you succeed in the
MARYLAND OSHA 10 CONSTRUCTION CERTIFICATION EXAM PRACTICE QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS RATIONALE 2026/27. It contains 90 carefully selected questions that
reflect the most current exam content and testing strategies. Each question is accompanied by a correct answer
and a detailed rationale that explains the underlying pathophysiology, pharmacology, or clinical reasoning.
Self-Assessment – Test your knowledge and Exam Preparation – Familiarize yourself with the
identify areas requiring further question format and content
study areas
Concept Reinforcement – Deepen your Confidence Building – Develop test-taking
understanding through strategies and reduce
evidence-based exam anxiety
rationales
Time Management – Practice answering
questions under simulated
exam conditions
Review Summary 90 Questions
Foundations - Application - Maryland OSHA 10 Construction Certification AND Correct PLUS Rationale
2026/27 Occupational Safety AND Health Construction Undergraduate YEAR 3 / Graduate
All answers with rationales
,Table of Contents
Content Area Questions Key Topics
Introduction TO OSHA AND 1-15 Construction, Required, Worker, OSHA S, Exposure
Worker Rights
Walking AND Working 16-30 Construction, Worker, Required, Entry, Exposure
Surfaces
EXIT Routes Emergency 31-45 Construction, Required, OSHA S, System, Worker
Action Plans FIRE Prevention
Plans AND FIRE Protection
Electrical Safety 46-60 Construction, Required, Worker, Standards, Portable
Personal Protective 61-75 Worker, Construction, System, Trench, Portable
Equipment PPE
Hazard Communication 76-90 Construction, Worker, Required, Crane, Capacity
Hazcom
TOTAL 90 All questions include answers and detailed rationales
,Section A - Introduction TO OSHA AND Worker Rights
Q1.
A contractor is planning to use a portable ladder to access a roof 12 feet above the
ground. The ladder is 16 feet long and will be placed at the correct angle. However, the
ladder's top will rest against a window sill that is not stable. What is the most appropriate
course of action?
A. Proceed with the ladder, as the angle is B. Secure the ladder at the top to prevent
correct and the height is within OSHA limits slipping, and ensure the window sill can
support the load
C. Use a different access method, such as a D. Have a worker hold the ladder at the
scaffold or aerial lift, because the window sill bottom to prevent movement
is not a stable support
Correct: C - Use a different access method, such as a scaffold or aerial lift, because the
window sill is not a stable support
Rationale:OSHA requires ladders to be used on stable and level surfaces, and the top must
be supported on a stable surface. A window sill is not a stable support, so using a different
access method is required to prevent falls.
Why the other answers are wrong:
A. Correct angle does not compensate for unstable top support, which OSHA prohibits.
B. Securing the ladder to a window sill does not make it stable; the sill itself is not a secure
anchorage.
D. Having a worker hold the ladder does not address the unstable top support and is not an
acceptable fall protection measure.
Reference: OSHA 29 CFR 1926.1053 - Ladders
Q2.
During a trenching operation, atmospheric testing reveals oxygen levels at 18.5% and the
presence of hydrogen sulfide at 5 ppm. According to OSHA's permit-required confined
space standard, what is the correct classification and required action?
A. The space is not a permit-required B. The space is a permit-required confined
confined space because hydrogen sulfide is space because oxygen is below 19.5%, and
below the PEL, but oxygen is low, so entry requires a permit and continuous
continuous monitoring is needed monitoring
C. The space is a permit-required confined D. The space is a non-permit confined
space only if hydrogen sulfide exceeds the space because the oxygen level is above
PEL, so entry is allowed with air purifying 18%, and hydrogen sulfide is below the
respirators IDLH
Correct: B - The space is a permit-required confined space because oxygen is below
Page 3
, Section A - Introduction TO OSHA AND Worker Rights
19.5%, and entry requires a permit and continuous monitoring
Rationale:OSHA defines a permit-required confined space as having an oxygen
concentration below 19.5% or above 23.5%, or containing a hazardous atmosphere. Here,
oxygen is 18.5%, so it is a permit-required space; entry requires a permit, continuous
monitoring, and other protective measures.
Why the other answers are wrong:
A. Oxygen below 19.5% alone triggers permit-required classification, regardless of hydrogen
sulfide levels.
C. The presence of hydrogen sulfide is not required; low oxygen is sufficient for permit-required
status.
D. Oxygen below 19.5% is not acceptable; the space is permit-required, not non-permit.
Reference: OSHA 29 CFR 1910.146 - Permit-Required Confined Spaces
Q3.
A construction site uses a crane to lift materials. The load chart indicates that at a 50-foot
radius, the crane's capacity is 10,000 pounds. The load being lifted weighs 9,500 pounds,
but the rigging weighs 300 pounds and the hook block weighs 200 pounds. What is the
total load on the crane, and is the lift within capacity?
A. Total load is 9,500 pounds; lift is within B. Total load is 9,800 pounds; lift is within
capacity capacity
C. Total load is 10,000 pounds; lift is at D. Total load is 10,000 pounds; lift is not
maximum capacity within capacity
Correct: D - Total load is 10,000 pounds; lift is not within capacity
Rationale:The total load includes the load, rigging, and hook block: 9,500 + 300 + 200 =
10,000 pounds. The crane's capacity at that radius is 10,000 pounds, but OSHA requires not
exceeding capacity; typically, you must not lift at or above capacity due to safety factors.
Therefore, the lift is not within the safe working load.
Why the other answers are wrong:
A. Omits the weight of rigging and hook block, which must be included in the total load.
B. Omits the hook block weight; total load is 10,000 pounds, not 9,800.
C. Correctly calculates total load but incorrectly assumes that lifting at capacity is acceptable;
OSHA requires a safety margin.
Reference: OSHA 29 CFR 1926.1417 - Cranes and Derricks in Construction: Operator Certification
Q4.
A worker is using a circular saw to cut wood on a construction site. The saw has a
damaged blade guard that does not automatically return to cover the blade. What is the
required action according to OSHA's hand and portable power tools standard?
Page 4
