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Mobile Cranes No. 2 – Questions & Complete Solutions
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Mobile Cranes No. 2 – Questions & Complete SolutionsAccording to ASME B30.10 any hook having wear exceeding __________%
shall be removed from service Correct Ans - 10%
According to OSHA 1926.1412 what type of inspection is not required to be
performed on cranes? Correct Ans - Quarterly
Which of the following listed below shall not be used for suspension
systems for personnel platforms? Correct Ans - Synthetic Web
bridle
According to OSHA 1926.1408, Option #2 (20 foot clearance rule) what is
the maximum voltage you may work around? Correct Ans - 350kV
According to OSHA 1926 subpart CC, when working around power lines
over 1000 kV the minimum clearance is set by Correct Ans - Utility
company owning power lines
According to OSHA who should never be in the fall zone? Correct Ans -
Signal person evaluator
According to most manufacturers when performing assembly or
disassembly of booms what type of slings should be used? Correct Ans
- Synthetic Slings
When performing crane operations near new excavation what could cause
it to collapse? Correct Ans - Vibration
What type of material should not be used around synthetic slings?
Correct Ans - Acid
According to ASME B30.10 any hook having distortion causing an increase
in throat opening of more than 5%, or exceeding 1/4 inch, shall be?
Correct Ans - Repaired or replaced
Electrocution is the number one cause of fatalaties associated with cranes,
Does the boom, load line, or load have to physically contact a power line for
electrocution to occur? Correct Ans - No
, According to B30.10 crane hooks must not be twisted in excess of....
Correct Ans - 0 degrees
According to B30.10 crane hooks throat opening must not exceed:
Correct Ans - 5% of its original size
Which of the following is required as per 1926.1433 Correct Ans -
fire extinguisher
What is the leading cause of fatalities to ground crews working around
cranes Correct Ans - Electrocution
What is a two leg bridle Correct Ans - Two wire rope slings
attached by a lifting ring
Crane configuration includes Correct Ans - Reeving, boom length,
counterweight, on outrigger or on rubber, extensions or jibs stowed or
mounted, offsets, and wire rope type or construction
Net capacity is equal to? Correct Ans - Gross capacity minus
deductions
Jib offset is the jib angle to the: Correct Ans - Boom
Using a range diagram, boom length and angle can be used to determine?
Correct Ans - Load radius
A crane with a 120 ft boom will be operating at a 42 ft radius. The load
chart has a capacity at 40 ft radius and one at 45 ft radius. Which radius
will you use to find the gross capacity? Correct Ans - 45 ft
A truck crane operating with outriggers fully extended and set, does not
have its front outrigger set, the operator should? Correct Ans -
Refer to the manufacturers working area diagram
If determining boom tip elevation in necessary, the best way to determine
this is to? Correct Ans - Use the range diagram
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