Texas Tower Crane Operator License
Practice Exam Questions And Correct
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Rationales 2025|2026 Q&A | Instant
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1. What is the primary purpose of a load moment indicator (LMI) on a
tower crane?
A. To adjust boom length
B. To show wind speed
C. To warn of potential overload conditions
D. To measure the crane's total height
The LMI alerts the operator when lifting loads near or beyond the
crane’s rated capacity, ensuring safety.
2. What is the effect of increasing the load radius on the crane's lifting
capacity?
A. Increases capacity
B. Decreases capacity
C. Has no effect
D. Doubles the capacity
As the load moves further from the center of rotation, the crane’s
lifting capacity decreases due to increased moment arm.
,3. What is the definition of “working radius” in crane operation?
A. Distance between outriggers
B. Distance from the center of rotation to the center of the load
C. Height of the mast
D. Length of the jib
Working radius directly affects load capacity and stability in crane
operations.
4. Which standard applies to tower crane safety in the U.S.?
A. ASME B30.23
B. OSHA 1926 Subpart CC
C. ANSI Z359
D. NFPA 70E
OSHA 1926 Subpart CC covers cranes and derricks in construction,
including tower cranes.
5. What must be done before climbing a tower crane to increase height?
A. Notify the owner
B. Perform a daily inspection
C. Tighten all bolts
D. Secure permits and follow engineered climbing procedures
Crane climbing is complex and must follow engineered plans and
regulatory procedures to ensure structural integrity.
6. Which component is essential to prevent a tower crane from rotating
freely in high winds when not in use?
A. Boom stop
B. Slew ring lock
C. Hoist brake
D. Boom angle indicator
The slew ring lock prevents uncontrolled rotation in strong winds,
reducing risk of damage or collapse.
, 7. What is the maximum allowable wind speed for operating most tower
cranes?
A. 50 mph
B. 20-25 mph
C. 35 mph
D. 10 mph
Tower cranes are typically shut down when wind speeds exceed 20-
25 mph to prevent loss of control.
8. Who is responsible for the final decision to lift a load?
A. Rigger
B. Signal person
C. Crane operator
D. Supervisor
The crane operator holds ultimate responsibility for the safety of the
lift.
9. What is the term for lifting a load and moving it from one point to
another without stopping?
A. Pick and carry
B. Tandem lift
C. Blind lift
D. Multi-crane lift
“Pick and carry” involves lifting and transporting a load
simultaneously, which is not recommended for tower cranes.
10. What is the purpose of anti-two block devices on cranes?
A. To stop the crane from tipping
B. To prevent the hook block from contacting the boom tip
C. To alert ground personnel
D. To measure load sway
Practice Exam Questions And Correct
Answers (Verified Answers) Plus
Rationales 2025|2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of a load moment indicator (LMI) on a
tower crane?
A. To adjust boom length
B. To show wind speed
C. To warn of potential overload conditions
D. To measure the crane's total height
The LMI alerts the operator when lifting loads near or beyond the
crane’s rated capacity, ensuring safety.
2. What is the effect of increasing the load radius on the crane's lifting
capacity?
A. Increases capacity
B. Decreases capacity
C. Has no effect
D. Doubles the capacity
As the load moves further from the center of rotation, the crane’s
lifting capacity decreases due to increased moment arm.
,3. What is the definition of “working radius” in crane operation?
A. Distance between outriggers
B. Distance from the center of rotation to the center of the load
C. Height of the mast
D. Length of the jib
Working radius directly affects load capacity and stability in crane
operations.
4. Which standard applies to tower crane safety in the U.S.?
A. ASME B30.23
B. OSHA 1926 Subpart CC
C. ANSI Z359
D. NFPA 70E
OSHA 1926 Subpart CC covers cranes and derricks in construction,
including tower cranes.
5. What must be done before climbing a tower crane to increase height?
A. Notify the owner
B. Perform a daily inspection
C. Tighten all bolts
D. Secure permits and follow engineered climbing procedures
Crane climbing is complex and must follow engineered plans and
regulatory procedures to ensure structural integrity.
6. Which component is essential to prevent a tower crane from rotating
freely in high winds when not in use?
A. Boom stop
B. Slew ring lock
C. Hoist brake
D. Boom angle indicator
The slew ring lock prevents uncontrolled rotation in strong winds,
reducing risk of damage or collapse.
, 7. What is the maximum allowable wind speed for operating most tower
cranes?
A. 50 mph
B. 20-25 mph
C. 35 mph
D. 10 mph
Tower cranes are typically shut down when wind speeds exceed 20-
25 mph to prevent loss of control.
8. Who is responsible for the final decision to lift a load?
A. Rigger
B. Signal person
C. Crane operator
D. Supervisor
The crane operator holds ultimate responsibility for the safety of the
lift.
9. What is the term for lifting a load and moving it from one point to
another without stopping?
A. Pick and carry
B. Tandem lift
C. Blind lift
D. Multi-crane lift
“Pick and carry” involves lifting and transporting a load
simultaneously, which is not recommended for tower cranes.
10. What is the purpose of anti-two block devices on cranes?
A. To stop the crane from tipping
B. To prevent the hook block from contacting the boom tip
C. To alert ground personnel
D. To measure load sway
