Test Your Rigging Knowledge Answer Key

1. When installing a shackle pin into a screw pin shackle you first hand tighten the pin and then?
   a) Leave the pin hand tight.
   b) Back the pin off one-quarter turn.
   c) Back the pin off one-half turn.
   d) Back the pin off one-full turn.

2. What sling material shall not be used when acid conditions are present?
   a) Polypropylene.
   b) Nylon.
   c) Chain.
   d) Galvanized products.

3. For improved load security, which hitch would be the best?
   a) Single-wrap choker hitch.
   b) Single-wrap basket hitch.
   c) Choker hitch with the eye pulled down on the load.
   d) Double-wrap choker hitch.

4. What is the stress per sling leg when two slings are placed at a 30 degree horizontal sling angle to lift a 1,000 pound load?
   a)  500 pounds.
   b)  750 pounds.
   c)  1,000 pounds.
   d)  2,000 pounds.

5. What can happen if you attach slings to a point below the load’s vertical center of gravity?
   a) You gain a mechanical advantage.
   b)The load is well balanced.
   c) The load may topple.
   d) The load ‘sits down’ in the sling bridle.

Answers:

1. a   2. b  3. d  4. c  5. c

Remember, Safety through Education is more than our motto, it is our guiding principle.  If you need to help maintain the safety of your site by having your workers taught the proper way to rig, give us a call 800-290-0007 or contact us for a quote.  Just click on the links if you want to find more about our programs, including Qualified Rigger Level 1, Qualified Rigger Level 2, or the Train-The-Trainer options.