QUESTIONS AND VERIFIED SOLUTIONS
◉ 11) OSHA regulations require hook replacement if the opening
exceeds what percentage of its original throat opening? Answer:
15%
◉ 12) At what percentage of increase in length should a chain sling
be removed from service? Answer: 5%
◉ 13) 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: Answer: Lift plan
◉ 14) What provides additional control of a load being lifted?
Answer: Tag lines
◉ 15) When traveling on a rubber tire mobile crane, how should the
boom be positioned? Answer: In line with the direction of travel
◉ 16) Before performing pick and carry operations with any mobile
crane, it is important to: Answer: Refer to the manufacturer's
capacity chart
, ◉ 17 ) According to ASME B30.5 , a two crane lift is signaled by
Answer: One designated person
◉ 18) How much force would be required to move an object up an
inclined plane compared to lifting it vertically? Answer: Less force
◉ 20) All of the following are reasons for stopping personnel lifting
operations EXCEPT Answer: There are no tag lines
◉ 22) The point of any object's weight can be assumed to be
concentrated at: Answer: Center of gravity
◉ 23) In a spur-gear chain hoist with a two chain system, the
endless chain is used to Answer: Raise and lower the load
◉ 24) In an emergency situation, what is the rigger's FIRST priority?
Answer: To prevent injury or loss of life
◉ 25) All of the following conditions exert dynamic loading on a
crane EXCEPT: Answer: Static boom angle
◉ 26) Proper lead sheave placement as it relates to the hoisting
drum location is: Answer: Proper spooling of wire rope