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Question 1. What does the term "Working Load Limit (WLL)" refer to in rigging? A) The maximum load that can be applied to equipment without permanent deformation B) The load at which equipment will break C) The total weight of the rigging hardware D) The weight of the crane Answer: A Explanation: WLL is the maximum load a piece of rigging equipment can handle without permanent deformation or failure. Question 2. Who is responsible for ensuring that rigging equipment is inspected before use? A) The crane operator
B) The rigger C) The site supervisor D) The manufacturer Answer: B Explanation: It is the rigger’s duty to inspect all rigging equipment before use to ensure safety. Question 3. Which document outlines the steps, equipment, and personnel needed for a specific lift? A) Material Safety Data Sheet B) Rigging Plan C) Safety Data Sheet D) Inspection Report
Question 5. What is the main function of a tagline during a lift? A) Increase the load weight B) Control and guide the load C) Secure the crane D) Replace slings Answer: B Explanation: Taglines are used to control the movement and orientation of a load during lifting operations. Question 6. Which of the following is a standard hand signal for “hoist”? A) Arm extended, index finger pointing up, moving in a small circle B) Arm extended, thumb down C) Arm waving back and forth
D) Both arms crossed Answer: A Explanation: The standard hand signal for “hoist” is the arm extended upward with the index finger pointing up, moving in a circular motion. Question 7. What does the term “Design Factor” refer to in rigging? A) The price of equipment B) The ratio between breaking strength and working load limit C) The number of slings used D) The age of the equipment Answer: B Explanation: The design factor is the ratio of the breaking strength of equipment to its WLL, providing a safety margin.
B) Using a load cell or scale C) Visual estimation D) Asking the crane operator Answer: B Explanation: A load cell or scale provides an accurate measurement of a load’s weight. Question 10. Which of the following is a critical reason to find the center of gravity (CG) of a load? A) To reduce crane size B) To balance the load and prevent tipping C) To speed up the lift D) For cosmetic reasons
Answer: B Explanation: Knowing the CG ensures the load is stable during lifting and prevents accidents. Question 11. The safe working load (SWL) of rigging equipment is determined by: A) The manufacturer B) The user C) The crane operator D) The project manager Answer: A Explanation: The SWL is specified by the manufacturer based on design and testing.
C) Measuring the equipment’s length D) Cleaning the equipment Answer: B Explanation: Proof testing subjects equipment to a load above its WLL to verify its integrity. Question 14. Which of the following is a proper way to inspect a wire rope sling? A) By color B) By checking for broken wires, kinks, and birdcaging C) By measuring its length only D) By its manufacturer Answer: B
Explanation: Broken wires, kinks, and birdcaging are signs of damage in wire rope slings. Question 15. What is a “critical lift”? A) Any lift that takes more than 10 minutes B) A lift that involves a load exceeding 75% of crane capacity or poses high risk C) A lift below 500 pounds D) Any lift performed outdoors Answer: B Explanation: Critical lifts have high risk due to heavy loads, proximity to hazards, or complex operations. Question 16. Which organization publishes the B30 standard for rigging?
D) Lubricate it Answer: C Explanation: Damaged hardware must be removed from service immediately to prevent accidents. Question 18. What type of shackle is preferred for overhead lifting? A) Screw pin shackle B) Bolt-type shackle with nut and cotter pin C) Snap shackle D) Twist shackle Answer: B Explanation: Bolt-type shackles with nut and cotter are more secure for overhead lifts.
Question 19. How should synthetic slings be stored to maximize their service life? A) In direct sunlight B) In a dry, clean area away from UV and chemicals C) On the ground D) Hung over sharp edges Answer: B Explanation: UV and chemicals degrade synthetic slings; store them in a clean, dry, shaded place. Question 20. When using wire rope clips, what is the minimum number recommended for a 1-inch diameter wire rope? A) 1
Answer: B Explanation: Lower sling angles increase tension; the sling angle factor helps calculate safe load limits. Question 22. Which type of sling is best suited for lifting hot materials? A) Synthetic web sling B) Wire rope sling C) Polyester round sling D) Alloy chain sling Answer: D Explanation: Alloy chain slings withstand high temperatures better than other types.
Question 23. What is considered an unsafe practice when using a hook? A) Ensuring the latch is closed B) Loading the hook at the tip only C) Inspecting for cracks D) Using the hook in-line with the load Answer: B Explanation: Hooks should never be loaded at the tip; this can cause bending or failure. Question 24. What is the primary hazard of shock loading a sling? A) It cleans the sling B) It can cause sudden failure C) It sharpens the sling
Question 26. What is the most important factor in determining the stability of a suspended load? A) Color of the load B) Center of gravity location C) Number of workers D) Length of slings Answer: B Explanation: The center of gravity must be below the hook and balanced for stability. Question 27. If a synthetic sling has a visible cut, what action should be taken? A) Tape over the cut
B) Continue using it C) Remove from service D) Ignore it Answer: C Explanation: Damaged slings must be removed from service to avoid failure. Question 28. Which of the following is a correct statement about basket hitches? A) They double the capacity of the sling compared to a single vertical hitch B) They reduce the capacity by half C) They are only used for round loads D) They are used for horizontal pulls only
