NCCCO TOWER CRANE OPERATOR
CERTIFICATION EXAM QUESTION AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
INSTANT DOWNLOAD PDF
1. What is the primary purpose of load charts on a tower crane?
A. To show engine performance data
B. To indicate maximum allowable wind speeds
C. To determine safe lifting capacities at various radii and configurations
D. To show maintenance intervals
Rationale: Load charts specify rated capacities based on boom length,
radius, and configuration to prevent overloading.
2. Who is responsible for ensuring the crane is set up according to
manufacturer specifications?
A. Signal person
B. Rigger
C. Crane operator
D. Site foreman
Rationale: The operator is responsible for verifying proper setup and
configuration before operation.
3. What factor most affects a tower crane’s lifting capacity?
A. Load height
B. Load radius
C. Hoist speed
D. Counterweight color
Rationale: Capacity decreases as the load radius increases.
,4. When should a tower crane be inspected?
A. Weekly only
B. Monthly only
C. Daily before use
D. After each lift
Rationale: Daily inspections help identify safety issues before operation.
5. What is the purpose of counterweights on a tower crane?
A. Increase lifting speed
B. Balance the load and maintain stability
C. Reduce electrical load
D. Improve visibility
Rationale: Counterweights counteract the moment created by the lifted
load.
6. What is the maximum allowable wind speed for most tower crane
operations unless otherwise specified?
A. 10 mph
B. 20 mph
C. Manufacturer-specified limit
D. 50 mph
Rationale: Wind limits vary by crane and must follow manufacturer
guidelines.
7. Which component controls the rotation of the crane?
A. Hoist drum
B. Trolley
C. Slewing ring and motor
D. Mast
Rationale: Slewing components allow the crane to rotate horizontally.
8. What should be done if the crane’s load moment indicator alarms?
A. Ignore it
B. Increase speed
C. Stop the lift and assess conditions
D. Lower counterweights
Rationale: An alarm indicates unsafe loading conditions.
, 9. What is the function of a trolley on a tower crane?
A. Lifts the load vertically
B. Moves the load in and out along the jib
C. Rotates the crane
D. Supports counterweights
Rationale: The trolley adjusts load radius by traveling along the jib.
10.What must be verified before lifting personnel with a crane?
A. Crane color
B. Crane and platform approval for personnel lifting
C. Operator preference
D. Weather forecast only
Rationale: Personnel lifting requires special approval and equipment.
11.Who gives signals to the crane operator during a lift?
A. Any worker
B. Foreman
C. Designated signal person
D. Inspector
Rationale: Only trained and designated signal persons should direct crane
movements.
12.What is the minimum clearance distance from energized power lines?
A. 5 feet
B. 10 feet
C. As specified by OSHA and local regulations
D. Zero if insulated
Rationale: Clearance varies by voltage and regulation.
13.What does “free-standing height” refer to?
A. Boom length
B. Maximum unsupported mast height
C. Counterweight height
D. Hook height
Rationale: It is the height the crane can stand without ties.
CERTIFICATION EXAM QUESTION AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
INSTANT DOWNLOAD PDF
1. What is the primary purpose of load charts on a tower crane?
A. To show engine performance data
B. To indicate maximum allowable wind speeds
C. To determine safe lifting capacities at various radii and configurations
D. To show maintenance intervals
Rationale: Load charts specify rated capacities based on boom length,
radius, and configuration to prevent overloading.
2. Who is responsible for ensuring the crane is set up according to
manufacturer specifications?
A. Signal person
B. Rigger
C. Crane operator
D. Site foreman
Rationale: The operator is responsible for verifying proper setup and
configuration before operation.
3. What factor most affects a tower crane’s lifting capacity?
A. Load height
B. Load radius
C. Hoist speed
D. Counterweight color
Rationale: Capacity decreases as the load radius increases.
,4. When should a tower crane be inspected?
A. Weekly only
B. Monthly only
C. Daily before use
D. After each lift
Rationale: Daily inspections help identify safety issues before operation.
5. What is the purpose of counterweights on a tower crane?
A. Increase lifting speed
B. Balance the load and maintain stability
C. Reduce electrical load
D. Improve visibility
Rationale: Counterweights counteract the moment created by the lifted
load.
6. What is the maximum allowable wind speed for most tower crane
operations unless otherwise specified?
A. 10 mph
B. 20 mph
C. Manufacturer-specified limit
D. 50 mph
Rationale: Wind limits vary by crane and must follow manufacturer
guidelines.
7. Which component controls the rotation of the crane?
A. Hoist drum
B. Trolley
C. Slewing ring and motor
D. Mast
Rationale: Slewing components allow the crane to rotate horizontally.
8. What should be done if the crane’s load moment indicator alarms?
A. Ignore it
B. Increase speed
C. Stop the lift and assess conditions
D. Lower counterweights
Rationale: An alarm indicates unsafe loading conditions.
, 9. What is the function of a trolley on a tower crane?
A. Lifts the load vertically
B. Moves the load in and out along the jib
C. Rotates the crane
D. Supports counterweights
Rationale: The trolley adjusts load radius by traveling along the jib.
10.What must be verified before lifting personnel with a crane?
A. Crane color
B. Crane and platform approval for personnel lifting
C. Operator preference
D. Weather forecast only
Rationale: Personnel lifting requires special approval and equipment.
11.Who gives signals to the crane operator during a lift?
A. Any worker
B. Foreman
C. Designated signal person
D. Inspector
Rationale: Only trained and designated signal persons should direct crane
movements.
12.What is the minimum clearance distance from energized power lines?
A. 5 feet
B. 10 feet
C. As specified by OSHA and local regulations
D. Zero if insulated
Rationale: Clearance varies by voltage and regulation.
13.What does “free-standing height” refer to?
A. Boom length
B. Maximum unsupported mast height
C. Counterweight height
D. Hook height
Rationale: It is the height the crane can stand without ties.
