QUESTIONS AND ANSWERS
What is meant by the term two blocking? - ANS The load block contacts the boom point
sheaves.
Lifting 20,000 lbs with a 2 leg bridle sling at 30* horizontal sling angle, what is the force applied
to each leg? - ANS 20,000 pounds
In multiple crane lifts using an equalizer beam, The weight of the beam should be considered: -
ANS Part of the load weight
What is required if there is a deviation from the plan lift? - ANS A new plan lift
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? - ANS 5%
All of the following are results of unbalanced reeving of the hook block EXCEPT: - ANS Wear
on the hook
Before a spreader bar or beams can be used they must have been: - ANS Tested and
approved
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, When materials are being hoisted to an upper level, a tagline is used to: - ANS 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? - ANS 60,000 lbs
To confirm the rated capacity of a specific sling, consult the manufacturer 's - ANS Sling Tag
OSHA regulations require hook replacements if the opening exceeds what percentage of its
original throat opening? - ANS 15%
At what percentage of increase in length should a change sling be removed from service? -
ANS 5%
The methodical process that attempts to identify hazards and devise plans to overcome or
eliminate hazards which may interfere with crane or rigging is called: - ANS Lift plan
What provides additional control of a load been lifted? - ANS Tag lines
When traveling on a rubber tire mobile crane, how should the boom be positioned? - ANS In
line with the direction of travel
Before performing pick and carry operations with any mobile crane, it is important to: -
ANS Refer to the manufacturer's capacity chart
According to ASMEB30.5,a two crane lift is signaled by: - ANS One designated person
What is The PRIMARY concern when working with high boom angles? - ANS Backward
stability
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