What is meant by the term "two blocking"?
a. Placing blocks under the outrigger beams.
b. The load block contacts the boom point sheaves.
c. Stacking loads on top of one another.
d. The load strikes the boom while swinging. Correct Ans - b. The
load block contacts the boom point sheaves.
Lifting 20,000 lbs with a 2-leg bridle sling at a 30° horizontal sling angle,
what is the force applied to each leg?
a. 10,000 pounds
b. 20,000 pounds
c. 30,000 pounds
d. 40,000 pounds Correct Ans - b. 20,000 pounds
In multiple crane lifts using an equalizer beam, the weight of the beam
should be considered:
a. Part of the crane boom
b. Part of the load weight
c. Part of the crane weight
d. A non-factor Correct Ans - b. Part of the load weight
What is required if there is a deviation from the lift plan?
a. The supervisor's permission
b. The rigger's permission
c. A new lift plan
d. Mark ups on the existing lift plan Correct Ans - c. A new lift plan
On level ground using skids and rollers, what percent of the weight of the
load should yield the required line pull as a general rule of thumb?
a. 2%
b. 5%
c. 10%
d. 20% Correct Ans - b. 5%
All of the following are results of unbalanced reeving of the hook block
EXCEPT:
a. Wear on the sheaves
, b. Torque on the boom
c. Wear on the hook
d. Wear on the wire rope Correct Ans - c. Wear on the hook
Before a spreader bar or beams can be used they MUST have been:
a. Repainted
b. Used before
c. Tested and approved
d. Upgraded from the previous job Correct Ans - c. Tested and
approved
When materials are being hoisted to an upper level, a tag line is used to:
a. Help raise the load
b. Help control the load
c. Stop the process
d. Stop material from falling Correct Ans - b. Help control the load
Two cranes are lifting 100 tons. If crane A has 40% of the load, how much
weight will crane B have on its hook?
a. 60,000 lbs
b. 80,000 lbs
c. 120,000 lbs
d. 240,000 lbs Correct Ans - a. 60,000 lbs
To CONFIRM the rated capacity of a specific sling, consult the
manufacturer's:
a. Sling chart
b. Website
c. Sling tag
d. Catalog Correct Ans - c. Sling tag
OSHA regulations require hook replacement if the opening exceeds what
percentage of its original throat opening?
a. 10%
b. 15%
c. 18%
d. 20% Correct Ans - b. 15%