Unit 1a - Basics Of Rigging
Unit 1a Basics of Rigging
- 1.
ItIf you are picking a unit of 16ea. (12"x12"x10')long timbers which are made out of oak, How heavy is the load?- A.
Approx..5,000lb.
- B.
Approx..10,000lb.
- C.
Approx..15,000lb.
- D.
Approx..20,000lb.
- 2.If the rigging on your hook is 1/2 in. off center. approx what percentage of the load can it carry?
- A.
75%
- B.
80%
- C.
85%
- D.
90%
- 3.
When using a 2 part bridle with a sling angle of 45degrees, what size rigging would be needed to lift a load of 31,000 pounds?
- A.
1 1/8
- B.
1 1/4
- C.
1 3/4
- D.
1/2
- 4.Before using a spreader bar you must have the following items. (check all that apply)
- A.
A capacity stamped on the spreader bar
- B.
A design drawing showing correct configuration
- C.
A photo of the spreader bar in the district office
- D.
A pipe welded to the spreader bar with the design inside of it?
- 5.Which is part of the Basic Guidelines?
- A.
Never exceed the W.L.L.
- B.
Always use a tag line
- C.
Never get under the load
- D.
All of the above
- 6.What should you do if you notice a wire rope has evidence of heat damage?
- A.
Cool it down with water
- B.
Ignore it
- C.
Tell your superviser, but keep in use
- D.
Take out of service completely
- 7.Never side load a round pin shackle.
- A.
True
- B.
False
- 8.Sometimes we need to use__________to avoid damaging rigging and/or equipment.
- A.
The working load limit
- B.
Softeners
- C.
W.L.L
- D.
Common sense
- 9.When all legs of the sling will be equally spaced around the center of gravity, the sling sizes should be based on only four legs as the load can teeter from corner to corner thus loading only two slings.
- A.
True
- B.
False
- 10.D to d ratio should be what?
- A.
21:1
- B.
20:1
- C.
19:1
- D.
18:1
- 11.When using a 2 part bridle it is better to have a higher sling angle for more lifting capacity.
- A.
True
- B.
False
- 12.Take out of service?
- A.
3 broken wires in one strand of a lay
- B.
6 broken wires in one entire lay
- C.
Kinking birdcaging or distortion of wire rope
- D.
All of the above
- 13.Does Kiewit's policy allow for chains to be used for general rigging?
- A.
No
- B.
Yes
- C.
Depends on the job
Questions: 80 | Attempts: 9556 | Last updated: Mar 31, 2022
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