NYC DOB MASTER RIGGER LICENSE EXAM PRACTICE
QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS)
PLUS RATIONALE 2026/| INSTANT DOWNLOAD PDF
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 MASTER RIGGER LICENSE EXAM PRACTICE QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALE 2026/| INSTANT DOWNLOAD PDF. 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 Master Rigger License AND Correct PLUS Rationale 2026/ Instant
Download PDF NYC DOB Master Rigger License Examination Graduate / Professional Certification
All answers with rationales
,Table of Contents
Content Area Questions Key Topics
Rigging Equipment AND 1-14 Crane, Sling, Rigger, Capacity, Lifting
Hardware
LOAD Handling AND Rigging 15-28 Rigger, Master, Crane, Capacity, WIRE ROPE
Practices
Crane Operations AND Safety 29-42 Sling, Rigger, Capacity, Crane, Rated
WIRE ROPE AND Sling 43-56 Sling, Crane, Rigger, Capacity, Master
Inspection
Signaling AND 57-70 Crane, Sling, Maximum, Capacity, Radius
Communication
Regulations AND Standards 71-80 Rigging, Breaking Strength, NYC DOB, Safety Factor, Sling
OSHA NYC DOB
TOTAL 80 All questions include answers and detailed rationales
,Section A - Rigging Equipment AND Hardware
Q1.
A mobile crane with a 200-foot main boom is lifting a 10,000 lb load at a 60-foot radius.
The boom angle is 50° from horizontal. The crane is on firm level ground. Which of the
following actions is MOST critical to prevent a two-blocking incident during the lift?
A. Ensure the anti-two-block device is B. Reduce the load to 8,000 lb to increase
operational and properly set for the current the safety margin.
boom length.
C. Increase the radius to 70 feet to reduce D. Use a shorter boom to reduce the risk of
the boom angle. contact with the boom tip.
Correct: A - Ensure the anti-two-block device is operational and properly set for the
current boom length.
Rationale:Two-blocking occurs when the load block contacts the boom tip, causing sudden
release of load and potential crane failure. The anti-two-block device is the primary safety
mechanism that prevents this by automatically stopping the hoist when contact is imminent.
Reducing load, increasing radius, or shortening the boom do not directly address the
two-blocking hazard.
Why the other answers are wrong:
B. Reducing load reduces stress but does not prevent the block from reaching the boom tip.
C. Increasing radius actually lowers the boom angle, increasing the risk of two-blocking.
D. Using a shorter boom may change the geometry but does not eliminate the need for an
anti-two-block device.
Reference: NYC DOB Master Rigger Study Guide, Chapter 6: Crane Safety Devices
Q2.
A rigging plan specifies a 4-leg bridle sling with a total load of 12,000 lb. Each leg is at a
60° horizontal angle. The sling is made of 1-inch wire rope with a rated capacity of 10,000
lb per leg. What is the tension in each leg, and is the rigging safe?
A. Tension = 3,000 lb per leg; safe because B. Tension = 3,464 lb per leg; safe because
it is below the rated capacity. it is below the rated capacity.
C. Tension = 6,000 lb per leg; unsafe D. Tension = 3,000 lb per leg; unsafe
because it exceeds the rated capacity. because the sling angle reduces capacity.
Correct: B - Tension = 3,464 lb per leg; safe because it is below the rated capacity.
Page 3
, Section A - Rigging Equipment AND Hardware
Rationale: For a multi-leg bridle, the tension per leg is calculated as T = (Total Load / Number
of Legs) / sin(angle from horizontal). Here, T = (12,) / sin(60°) = 3,.866 = 3,464
lb. This is below the 10,000 lb rated capacity, so the rigging is safe. Option A incorrectly
divides by sin, Option C assumes no angle factor, and Option D incorrectly suggests unsafe.
Why the other answers are wrong:
A. Incorrect calculation; does not account for the sine of the angle.
C. Uses 6,000 lb per leg, which ignores the angle factor and misallocates load.
D. Incorrectly concludes unsafe despite the calculated tension being below capacity.
Reference: Rigging Engineering, Chapter 3: Sling Tension Calculations
Q3.
Per NYC DOB rules, which of the following conditions REQUIRES a licensed master rigger
to be physically present at the job site?
A. When the load weight exceeds 50% of B. When the hoisting equipment is operated
the crane's rated capacity. within 10 feet of a building edge.
C. When the lift involves a load that is not D. When the crane is being used for a
visible to the operator. 'critical lift' as defined by the DOB.
Correct: D - When the crane is being used for a 'critical lift' as defined by the DOB.
Rationale:NYC DOB regulations mandate the presence of a licensed master rigger for critical
lifts, which are defined as lifts exceeding a certain weight, involving multiple cranes, or posing
special hazards. Other conditions may require additional safety measures but do not
necessarily mandate the physical presence of a master rigger.
Why the other answers are wrong:
A. Load weight percentage triggers load chart checks but not necessarily master rigger
presence.
B. Proximity to edges requires safeguards but not always master rigger presence.
C. Blind lifts require signalpersons but not necessarily a master rigger on site.
Reference: NYC DOB Rules, Title 1, Chapter 30, Section 30-05
Q4.
A crane is lifting a concrete bucket with a volume of 2 cubic yards. The concrete density is
4,000 psi mix, which weighs approximately 4,000 lb per cubic yard. The bucket weighs 500
lb. What is the total load on the crane?
A. 8,500 lb B. 8,000 lb
C. 4,500 lb D. 8,500 lb (including bucket weight)
Correct: A - 8,500 lb
Page 4
QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS)
PLUS RATIONALE 2026/| INSTANT DOWNLOAD PDF
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 MASTER RIGGER LICENSE EXAM PRACTICE QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALE 2026/| INSTANT DOWNLOAD PDF. 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 Master Rigger License AND Correct PLUS Rationale 2026/ Instant
Download PDF NYC DOB Master Rigger License Examination Graduate / Professional Certification
All answers with rationales
,Table of Contents
Content Area Questions Key Topics
Rigging Equipment AND 1-14 Crane, Sling, Rigger, Capacity, Lifting
Hardware
LOAD Handling AND Rigging 15-28 Rigger, Master, Crane, Capacity, WIRE ROPE
Practices
Crane Operations AND Safety 29-42 Sling, Rigger, Capacity, Crane, Rated
WIRE ROPE AND Sling 43-56 Sling, Crane, Rigger, Capacity, Master
Inspection
Signaling AND 57-70 Crane, Sling, Maximum, Capacity, Radius
Communication
Regulations AND Standards 71-80 Rigging, Breaking Strength, NYC DOB, Safety Factor, Sling
OSHA NYC DOB
TOTAL 80 All questions include answers and detailed rationales
,Section A - Rigging Equipment AND Hardware
Q1.
A mobile crane with a 200-foot main boom is lifting a 10,000 lb load at a 60-foot radius.
The boom angle is 50° from horizontal. The crane is on firm level ground. Which of the
following actions is MOST critical to prevent a two-blocking incident during the lift?
A. Ensure the anti-two-block device is B. Reduce the load to 8,000 lb to increase
operational and properly set for the current the safety margin.
boom length.
C. Increase the radius to 70 feet to reduce D. Use a shorter boom to reduce the risk of
the boom angle. contact with the boom tip.
Correct: A - Ensure the anti-two-block device is operational and properly set for the
current boom length.
Rationale:Two-blocking occurs when the load block contacts the boom tip, causing sudden
release of load and potential crane failure. The anti-two-block device is the primary safety
mechanism that prevents this by automatically stopping the hoist when contact is imminent.
Reducing load, increasing radius, or shortening the boom do not directly address the
two-blocking hazard.
Why the other answers are wrong:
B. Reducing load reduces stress but does not prevent the block from reaching the boom tip.
C. Increasing radius actually lowers the boom angle, increasing the risk of two-blocking.
D. Using a shorter boom may change the geometry but does not eliminate the need for an
anti-two-block device.
Reference: NYC DOB Master Rigger Study Guide, Chapter 6: Crane Safety Devices
Q2.
A rigging plan specifies a 4-leg bridle sling with a total load of 12,000 lb. Each leg is at a
60° horizontal angle. The sling is made of 1-inch wire rope with a rated capacity of 10,000
lb per leg. What is the tension in each leg, and is the rigging safe?
A. Tension = 3,000 lb per leg; safe because B. Tension = 3,464 lb per leg; safe because
it is below the rated capacity. it is below the rated capacity.
C. Tension = 6,000 lb per leg; unsafe D. Tension = 3,000 lb per leg; unsafe
because it exceeds the rated capacity. because the sling angle reduces capacity.
Correct: B - Tension = 3,464 lb per leg; safe because it is below the rated capacity.
Page 3
, Section A - Rigging Equipment AND Hardware
Rationale: For a multi-leg bridle, the tension per leg is calculated as T = (Total Load / Number
of Legs) / sin(angle from horizontal). Here, T = (12,) / sin(60°) = 3,.866 = 3,464
lb. This is below the 10,000 lb rated capacity, so the rigging is safe. Option A incorrectly
divides by sin, Option C assumes no angle factor, and Option D incorrectly suggests unsafe.
Why the other answers are wrong:
A. Incorrect calculation; does not account for the sine of the angle.
C. Uses 6,000 lb per leg, which ignores the angle factor and misallocates load.
D. Incorrectly concludes unsafe despite the calculated tension being below capacity.
Reference: Rigging Engineering, Chapter 3: Sling Tension Calculations
Q3.
Per NYC DOB rules, which of the following conditions REQUIRES a licensed master rigger
to be physically present at the job site?
A. When the load weight exceeds 50% of B. When the hoisting equipment is operated
the crane's rated capacity. within 10 feet of a building edge.
C. When the lift involves a load that is not D. When the crane is being used for a
visible to the operator. 'critical lift' as defined by the DOB.
Correct: D - When the crane is being used for a 'critical lift' as defined by the DOB.
Rationale:NYC DOB regulations mandate the presence of a licensed master rigger for critical
lifts, which are defined as lifts exceeding a certain weight, involving multiple cranes, or posing
special hazards. Other conditions may require additional safety measures but do not
necessarily mandate the physical presence of a master rigger.
Why the other answers are wrong:
A. Load weight percentage triggers load chart checks but not necessarily master rigger
presence.
B. Proximity to edges requires safeguards but not always master rigger presence.
C. Blind lifts require signalpersons but not necessarily a master rigger on site.
Reference: NYC DOB Rules, Title 1, Chapter 30, Section 30-05
Q4.
A crane is lifting a concrete bucket with a volume of 2 cubic yards. The concrete density is
4,000 psi mix, which weighs approximately 4,000 lb per cubic yard. The bucket weighs 500
lb. What is the total load on the crane?
A. 8,500 lb B. 8,000 lb
C. 4,500 lb D. 8,500 lb (including bucket weight)
Correct: A - 8,500 lb
Page 4
