NYC DOB HOISTING MACHINE OPERATOR CLASS A
LICENSE EXAM PRACTICE QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS RATIONALE 2026/
80 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
NYC DOB HOISTING MACHINE OPERATOR CLASS A LICENSE EXAM PRACTICE QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) PLUS RATIONALE 2026/. It contains 80 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 80 Questions
Foundations - Application - NYC DOB Hoisting Machine Operator Class A License AND Correct PLUS
Rationale 2026/ NYC DOB Hoisting Machine Operator Class A License Advanced Certification Graduate
Level
All answers with rationales
,Table of Contents
Content Area Questions Key Topics
General Knowledge AND 1-14 Crane, Capacity, Operator, Maximum, Rated
Safety
Hoisting Machinery AND 15-28 Crane, Capacity, Operator, Radius, NYC DOB
Equipment
Rigging AND LOAD Handling 29-42 Crane, Operator, Capacity, Radius, Class
SITE Operations AND 43-56 Operator, Class, Crane, Required, Capacity
Procedures
Regulations AND Standards 57-70 Operator, Crane, Required, Capacity, Class
Maintenance AND Inspection 71-80 Operator, Crane, Class, Required, LOAD Chart
TOTAL 80 All questions include answers and detailed rationales
,Section A - General Knowledge AND Safety
Q1.
During a tandem lift, the designated person-in-charge must ensure that the combined load
does not exceed what percentage of the sum of the rated capacities of the cranes
involved, considering that the cranes are of different capacities and the load is positioned
asymmetrically?
A. 75% of the sum of rated capacities B. 100% of the sum of rated capacities
C. 50% of the smaller crane's capacity D. 85% of the sum of rated capacities
Correct: A - 75% of the sum of rated capacities
Rationale:NYC DOB rules require that in tandem lifts, the combined load must not exceed
75% of the sum of the rated capacities to account for dynamic load sharing and potential
miscoordination. This safety margin is critical because unequal crane capacities and
asymmetric load distribution can lead to overloading one crane even if the total is within
100%. The other options are either too high (B, D) or not the standard rule (C).
Why the other answers are wrong:
B. 100% ignores the required safety margin and dynamic load sharing effects.
C. This is not a recognized rule; the 75% rule applies to the sum, not a single crane.
D. 85% is too high; the mandated maximum is 75% for tandem lifts.
Reference: NYC DOB Construction Safety Orders, Chapter 33, Section 3319.2
Q2.
A crawler crane with a lattice boom is configured with a 120-foot boom at a 60-degree
boom angle. The load chart indicates a capacity of 25,000 lbs at this configuration.
However, the crane is equipped with an auxiliary boom stop that limits the maximum
boom angle to 65 degrees. If the operator raises the boom to 65 degrees, what is the effect
on the crane's rated capacity, assuming the same radius?
A. Capacity increases because the radius B. Capacity decreases because the boom
decreases. angle is higher.
C. Capacity remains the same because the D. Capacity is not affected by boom angle; it
radius is unchanged. depends only on boom length.
Correct: A - Capacity increases because the radius decreases.
Rationale:Raising the boom angle reduces the operating radius (horizontal distance from the
center of rotation to the load hook), which generally increases the rated capacity of a crane.
The load chart is radius-based, so a smaller radius at a higher angle yields a higher capacity.
The auxiliary boom stop is a safety device, not a capacity limiter.
Page 3
, Section A - General Knowledge AND Safety
Why the other answers are wrong:
B. Higher boom angle reduces radius, which increases capacity, not decreases.
C. Radius changes with boom angle; it does not remain the same.
D. Boom angle affects radius, which is a primary factor in load charts.
Reference: Crane Safety Handbook, Load Charts and Configuration, 2026 Edition
Q3.
In accordance with NYC DOB regulations, which of the following conditions requires
immediate shutdown of a hoisting operation?
A. Wind speed exceeds 25 mph at the boom B. The operator observes a change in the
tip. color of the hydraulic fluid.
C. The load line is not vertical by more than D. A ground person is within 10 feet of the
5 degrees. load path.
Correct: A - Wind speed exceeds 25 mph at the boom tip.
Rationale:NYC DOB rules mandate that hoisting operations must cease when wind speed
exceeds 25 mph at the boom tip, as this can cause loss of load control. The other options are
not immediate shutdown conditions: hydraulic fluid color change may require inspection but
not immediate shutdown, load line angle is typically monitored but 5 degrees may be
acceptable, and a ground person within 10 feet of the load path is a hazard but not an
automatic shutdown if proper controls are in place.
Why the other answers are wrong:
B. A color change in hydraulic fluid may indicate contamination but is not an immediate
shutdown condition.
C. A 5-degree load line angle is within normal operating tolerances for many lifts.
D. Having a ground person within 10 feet is a safety concern but does not automatically require
shutdown if the operator is aware and controls the lift.
Reference: NYC DOB Rules for Construction, Section 3319.1, Wind Speed Limits
Q4.
A mobile crane is to lift a 10,000 lb load using a 2-part line. The crane's load chart
indicates a capacity of 20,000 lbs for the configuration with a single line. What is the
effective capacity of the crane when using a 2-part line, assuming the same configuration
and that the load chart is based on a single part?
A. 20,000 lbs B. 40,000 lbs
C. 10,000 lbs D. 30,000 lbs
Correct: B - 40,000 lbs
Page 4
LICENSE EXAM PRACTICE QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS RATIONALE 2026/
80 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
NYC DOB HOISTING MACHINE OPERATOR CLASS A LICENSE EXAM PRACTICE QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) PLUS RATIONALE 2026/. It contains 80 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 80 Questions
Foundations - Application - NYC DOB Hoisting Machine Operator Class A License AND Correct PLUS
Rationale 2026/ NYC DOB Hoisting Machine Operator Class A License Advanced Certification Graduate
Level
All answers with rationales
,Table of Contents
Content Area Questions Key Topics
General Knowledge AND 1-14 Crane, Capacity, Operator, Maximum, Rated
Safety
Hoisting Machinery AND 15-28 Crane, Capacity, Operator, Radius, NYC DOB
Equipment
Rigging AND LOAD Handling 29-42 Crane, Operator, Capacity, Radius, Class
SITE Operations AND 43-56 Operator, Class, Crane, Required, Capacity
Procedures
Regulations AND Standards 57-70 Operator, Crane, Required, Capacity, Class
Maintenance AND Inspection 71-80 Operator, Crane, Class, Required, LOAD Chart
TOTAL 80 All questions include answers and detailed rationales
,Section A - General Knowledge AND Safety
Q1.
During a tandem lift, the designated person-in-charge must ensure that the combined load
does not exceed what percentage of the sum of the rated capacities of the cranes
involved, considering that the cranes are of different capacities and the load is positioned
asymmetrically?
A. 75% of the sum of rated capacities B. 100% of the sum of rated capacities
C. 50% of the smaller crane's capacity D. 85% of the sum of rated capacities
Correct: A - 75% of the sum of rated capacities
Rationale:NYC DOB rules require that in tandem lifts, the combined load must not exceed
75% of the sum of the rated capacities to account for dynamic load sharing and potential
miscoordination. This safety margin is critical because unequal crane capacities and
asymmetric load distribution can lead to overloading one crane even if the total is within
100%. The other options are either too high (B, D) or not the standard rule (C).
Why the other answers are wrong:
B. 100% ignores the required safety margin and dynamic load sharing effects.
C. This is not a recognized rule; the 75% rule applies to the sum, not a single crane.
D. 85% is too high; the mandated maximum is 75% for tandem lifts.
Reference: NYC DOB Construction Safety Orders, Chapter 33, Section 3319.2
Q2.
A crawler crane with a lattice boom is configured with a 120-foot boom at a 60-degree
boom angle. The load chart indicates a capacity of 25,000 lbs at this configuration.
However, the crane is equipped with an auxiliary boom stop that limits the maximum
boom angle to 65 degrees. If the operator raises the boom to 65 degrees, what is the effect
on the crane's rated capacity, assuming the same radius?
A. Capacity increases because the radius B. Capacity decreases because the boom
decreases. angle is higher.
C. Capacity remains the same because the D. Capacity is not affected by boom angle; it
radius is unchanged. depends only on boom length.
Correct: A - Capacity increases because the radius decreases.
Rationale:Raising the boom angle reduces the operating radius (horizontal distance from the
center of rotation to the load hook), which generally increases the rated capacity of a crane.
The load chart is radius-based, so a smaller radius at a higher angle yields a higher capacity.
The auxiliary boom stop is a safety device, not a capacity limiter.
Page 3
, Section A - General Knowledge AND Safety
Why the other answers are wrong:
B. Higher boom angle reduces radius, which increases capacity, not decreases.
C. Radius changes with boom angle; it does not remain the same.
D. Boom angle affects radius, which is a primary factor in load charts.
Reference: Crane Safety Handbook, Load Charts and Configuration, 2026 Edition
Q3.
In accordance with NYC DOB regulations, which of the following conditions requires
immediate shutdown of a hoisting operation?
A. Wind speed exceeds 25 mph at the boom B. The operator observes a change in the
tip. color of the hydraulic fluid.
C. The load line is not vertical by more than D. A ground person is within 10 feet of the
5 degrees. load path.
Correct: A - Wind speed exceeds 25 mph at the boom tip.
Rationale:NYC DOB rules mandate that hoisting operations must cease when wind speed
exceeds 25 mph at the boom tip, as this can cause loss of load control. The other options are
not immediate shutdown conditions: hydraulic fluid color change may require inspection but
not immediate shutdown, load line angle is typically monitored but 5 degrees may be
acceptable, and a ground person within 10 feet of the load path is a hazard but not an
automatic shutdown if proper controls are in place.
Why the other answers are wrong:
B. A color change in hydraulic fluid may indicate contamination but is not an immediate
shutdown condition.
C. A 5-degree load line angle is within normal operating tolerances for many lifts.
D. Having a ground person within 10 feet is a safety concern but does not automatically require
shutdown if the operator is aware and controls the lift.
Reference: NYC DOB Rules for Construction, Section 3319.1, Wind Speed Limits
Q4.
A mobile crane is to lift a 10,000 lb load using a 2-part line. The crane's load chart
indicates a capacity of 20,000 lbs for the configuration with a single line. What is the
effective capacity of the crane when using a 2-part line, assuming the same configuration
and that the load chart is based on a single part?
A. 20,000 lbs B. 40,000 lbs
C. 10,000 lbs D. 30,000 lbs
Correct: B - 40,000 lbs
Page 4
