✅ NCCCO Tower Crane Certification
exam – Practice Theory Questions (With
Correct Answers)
1. Which organization publishes the primary safety standard used in U.S.
crane operations?
A. ISO
B. ANSI
C. OSHA
D. ASME
Correct Answer: D (ASME)
ASME B30 series outlines safety standards frequently referenced for cranes.
2. OSHA requires cranes to be inspected by a competent person at what
minimum frequency?
A. Weekly
B. Monthly
C. Annually
D. Daily before use
Correct Answer: D (Daily before use)
A daily shift inspection is required to ensure safe operation conditions.
3. What does “radius” refer to when discussing crane operations?
A. Distance from crane mast to operator
B. Distance from crane mast center to load center
C. Height of the load above ground
D. Length of the boom
Correct Answer: B (Distance from mast center to load center)
,4. The Load Moment Indicator (LMI) primarily warns the operator about
what?
A. High wind speeds
B. Approaching overload conditions
C. Electrical hazards
D. Boom angle errors
Correct Answer: B (Approaching overload conditions)
5. What factor reduces the lifting capacity of a tower crane most significantly?
A. Load color
B. Weather humidity
C. Increased radius
D. Operator weight
Correct Answer: C (Increased radius)
6. Which of the following is considered a “dynamic load”?
A. Load sitting still on the ground
B. Load lifted and moved suddenly
C. Load resting on a pallet
D. Load in storage
Correct Answer: B (Load lifted and moved suddenly)
7. A tag line is used primarily to:
A. Increase crane capacity
B. Prevent load rotation
C. Reduce wind loads
D. Increase visibility
Correct Answer: B (Prevent load rotation)
8. The purpose of counterweights on a tower crane is to:
, A. Support the mast
B. Reduce stress on the operator cab
C. Balance the load moment
D. Reduce wind sway
Correct Answer: C (Balance the load moment)
9. When reading a load chart, capacity decreases when:
A. Boom length increases
B. Radius decreases
C. Wind is calm
D. Load is lighter
Correct Answer: A (Boom length increases)
10. OSHA requires a minimum clearance of how many feet from energized
power lines up to 50 kV?
A. 5 ft
B. 10 ft
C. 15 ft
D. 20 ft
Correct Answer: B (10 ft)
11. What is the main function of the crane’s slewing mechanism?
A. Raise the load
B. Rotate the upper structure
C. Adjust boom length
D. Measure load weight
Correct Answer: B (Rotate the upper structure)
12. Wind speed limits are specified by:
A. Local weather service
B. Crane manufacturer
C. OSHA only
D. Operator preference
exam – Practice Theory Questions (With
Correct Answers)
1. Which organization publishes the primary safety standard used in U.S.
crane operations?
A. ISO
B. ANSI
C. OSHA
D. ASME
Correct Answer: D (ASME)
ASME B30 series outlines safety standards frequently referenced for cranes.
2. OSHA requires cranes to be inspected by a competent person at what
minimum frequency?
A. Weekly
B. Monthly
C. Annually
D. Daily before use
Correct Answer: D (Daily before use)
A daily shift inspection is required to ensure safe operation conditions.
3. What does “radius” refer to when discussing crane operations?
A. Distance from crane mast to operator
B. Distance from crane mast center to load center
C. Height of the load above ground
D. Length of the boom
Correct Answer: B (Distance from mast center to load center)
,4. The Load Moment Indicator (LMI) primarily warns the operator about
what?
A. High wind speeds
B. Approaching overload conditions
C. Electrical hazards
D. Boom angle errors
Correct Answer: B (Approaching overload conditions)
5. What factor reduces the lifting capacity of a tower crane most significantly?
A. Load color
B. Weather humidity
C. Increased radius
D. Operator weight
Correct Answer: C (Increased radius)
6. Which of the following is considered a “dynamic load”?
A. Load sitting still on the ground
B. Load lifted and moved suddenly
C. Load resting on a pallet
D. Load in storage
Correct Answer: B (Load lifted and moved suddenly)
7. A tag line is used primarily to:
A. Increase crane capacity
B. Prevent load rotation
C. Reduce wind loads
D. Increase visibility
Correct Answer: B (Prevent load rotation)
8. The purpose of counterweights on a tower crane is to:
, A. Support the mast
B. Reduce stress on the operator cab
C. Balance the load moment
D. Reduce wind sway
Correct Answer: C (Balance the load moment)
9. When reading a load chart, capacity decreases when:
A. Boom length increases
B. Radius decreases
C. Wind is calm
D. Load is lighter
Correct Answer: A (Boom length increases)
10. OSHA requires a minimum clearance of how many feet from energized
power lines up to 50 kV?
A. 5 ft
B. 10 ft
C. 15 ft
D. 20 ft
Correct Answer: B (10 ft)
11. What is the main function of the crane’s slewing mechanism?
A. Raise the load
B. Rotate the upper structure
C. Adjust boom length
D. Measure load weight
Correct Answer: B (Rotate the upper structure)
12. Wind speed limits are specified by:
A. Local weather service
B. Crane manufacturer
C. OSHA only
D. Operator preference
