QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES
2025
1. What is the primary responsibility of a Rigger Level 3 on a critical lift?
a. Operate the crane
b. Supervise the welding crew
c. Develop and oversee the lift plan
d. Calculate fuel usage for the crane
A Level 3 rigger is responsible for designing and managing complex
rigging operations, including critical lifts.
2. A load with an offset center of gravity will:
a. Swing evenly in all directions
b. Hang level
c. Tilt toward the heavier side
d. Become weightless
, The load will tilt toward the heavier end due to unequal weight
distribution.
3. The key document that must be developed before executing a critical
lift is:
a. Job hazard analysis
b. Lift plan
c. Work permit
d. Load ticket
A lift plan outlines the method, equipment, and personnel required
for the safe execution of a critical lift.
4. Which of the following is used to control the rotation of a load during
a lift?
a. Lifting beam
b. Tagline
c. Turnbuckle
d. Hoist block
A tagline helps control unwanted rotation and swinging of a
suspended load.
5. What is the D/d ratio?
a. The load weight divided by the sling strength
b. Diameter of the object being lifted divided by the diameter of the
sling
c. Depth of hook throat divided by the diameter of the pin
, d. Distance from center to the hook divided by load radius
D/d ratio impacts the efficiency and life of slings; a low D/d ratio can
damage slings.
6. Which of the following would be considered a critical lift?
a. Lifting a 5-ton load with a 30-ton crane
b. Lifting a pallet using a forklift
c. Tandem lifting a load over live piping
d. Hoisting tools to a 2nd floor
Critical lifts often involve multiple cranes, people, or hazards like live
equipment.
7. If a crane's load chart indicates a capacity of 20,000 lbs at a certain
radius, what should be the maximum load allowed including rigging?
a. 22,000 lbs
b. 20,000 lbs
c. 18,000 lbs
d. 25,000 lbs
The load chart includes all weight — including rigging. Never exceed
this value.
8. What is the function of a lifting beam?
a. Magnify the lifting capacity
b. Distribute the load and maintain horizontal lifting
c. Increase sling angle
d. Extend the crane's boom