Self-Test B-4.1: Describe the Principles of Lifting and Hoisting

Complete Self-Test B-4.1 and check your answers.

1. State the formula for mechanical advantage of a lever.
2. Where should the slings attach to the load, in relation to the centre of gravity?
3. Where will the centre of gravity of a load be positioned after it is lifted off the ground?
4. Does the position of the centre of gravity depend upon how the load is rigged?
5. Which safety factor determines the working load limit of a rigging system designed as a crew lift?
   1. 1:1
   2. 5:1
   3. 10:1
   4. 15:1
6. Who decides whether a rigger is qualified or not?
   1. Worker
   2. Employer
   3. Foreman
   4. WorkSafeBC

Answer Key: Self-Test B-4.1 is on the next page.