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Mobile Crane Questions Test #4 – Qs And As
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Mobile Crane Questions Test #4 – Qs And As
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Mobile Crane Questions Test #4 – Qs And AsJib offset is the jib angle to the: Correct Ans - Boom.
All hazards and problems that are found on the worksite should be
identified: Correct Ans - At the preoperational worksite inspection.
Which of the following OSHA regulations govern suspended personnel
platforms Correct Ans - OSHA 1926.1400(e).
According to OSHA the prohibited zone without a spotter for powerlines
that are 60 kV, is: Correct Ans - 15 ft.
What percentage of gross capacity is used when lifting with more than one
crane? Correct Ans - 75%.
You are required to pass a physical exam every _______ years. According to
ASME B30.5? Correct Ans - 3 years.
How many broken wires at an end socket of a standing wire rope are
allowed before the wire rope must be replaced? Correct Ans - 1.
When operating a mobile crane, you inspect your running wire rope at
least: Correct Ans - Every shift.
When lifting a load with more than one crane, it is important to:
Correct Ans - Keep the hoist lines of both cranes vertical.
Rotation resistant wire rope has a design factor of: Correct Ans - 5
to 1.
Line pull is: Correct Ans - The amount of weight a drum will hoist
for a given layer.
Boom length is: Correct Ans - Center of the foot pins to the center
of the head sheave pins.
The weight of the stowed jib used in the load calculation: Correct Ans -
Effective weight.
, A crane's rated capacity is based upon: Correct Ans - Structural and
stability.
When lifting a suspended personnel platform with two or more legs the
safety factor for the rigging hardware is: Correct Ans - 5 times the
intended load.
If using cranes of different rated capacities, the crane with the larger rated
capacity: Correct Ans - Should be hooked a distance closer to the
loads center of gravity.
Hoist ropes that are not rotation resistant must have a design factor of:
Correct Ans - 3.5 to 1.
Backward stability on a R/T crane could be a problem when the crane is
working: Correct Ans - Over the side at a minimum radius.
It is important to inspect rotation resistant wire rope more frequently
because: Correct Ans - Internal damage will occur more frequently.
It is important to know when lubricating wire rope that the lubricant must:
Correct Ans - Not hinder visual inspection.
Breaking strength devided by the design factor equals: Correct Ans -
Safe working load. SWL.
If determining boom tip elevation is important the best way to determine
this is to: Correct Ans - Call manufacturer.
When determining what position to dog the machine overnight and high
winds are expected: Correct Ans - Tie off to the closest solid
structure with the wind to your back.
When crane is in transit and you are required to pass under 50kV
powerlines what is OSHA's minimum required clearance? Correct Ans -
10 ft.
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