Review the problems below and give your best answer. Compare your answers to the Answer Key below.
1. The rigger may exceed the rated capacity of wire tope slings and web slings, but never alloy steel chain slings when making day-to-day lifts.
True ____ False ____
2. Of the three basic hitch types (single vertical, choker, basket), which hitch provides the least amount of lifting capacity?
A. ____ B. ____ C. ____
3. The tension in the legs of a two-legged bridle assembly being used at a 30 degree angle is twice the tension of that of two single vertical legs lifting the same object.
True ____ False ____
4. It’s okay to use a single basket hitch to pick up a bundle of aluminum as long as the rigger holds onto one end of the bundle to control the load.
True ____ False ____
5. A rigger can always use a four-legged bridle assembly with the knowledge that the load is equally distributed over all four legs.
True ____ False ____
6. When rigging up a basket hitch using a wire rope sling, the rigger will lose no capacity even if the pick point at the belly of the sling is the same diameter as the sling’s body.
True ____ False ____
7. When laying a load which has been rigged using two basket hitches down on the ground, it is advisable to block or crib up under the load so the slings can be removed with no effects from crushing.
True ____ False ____
8. When making a two-legged lift, the sling leg which appears to be in the most vertical plane will be carrying ____ net load than the more inclined sling.
A. more B. less
9. Taglines need only be used on loads which exceed 10,000 lbs.
True ____ False ____
10. A rigger should always attempt to remove sloshing fluid from a vessel prior to its being rigged and moved.
True ____ False ____
Load control is a key component of the Journeyman Rigger Training Course at ITI. A variety of rigger’s reference cards are available at the ITI Bookstore.
Happy trails to all my crane and rigging friends,
Mike Parnell
ITI-Field Services
P.S. This article was originally published on The Professional Rigger – Rigging Quiz – Hitch Types, Sling Angles, & Load Control.
Answers:
