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NCCCO MOBILE CRANE ( )
QUESTIONS WITH CORRECT
ANSWERS
- When may blocking (cribbing) be placed under outrigger
- When beams cannot be extended all the way out
- To increase capacity
- To improve stability
- Never
beams?
d.
- What is the result of placing timber blocking under the
- Decreases the permitted capacity of the crane
- Makes the crane more stable
- Reduces the capacity of the crane
- Makes the crane less stable
tips of the tracks on a crawler crane?
b.
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- According to ASME, what percentage of the
- 110%
- 85%
- 75%
manufacturer's crane rating must not be exceeded if a load test is done on a repaired crane?
b.
- Where is the tipping axis of a crawler crane located?
- It is always at the centerline of the idler or sprocket
- It depends if the idler or sprocket are in line or offset from
- It is through the centerline of the crane cab
- It is through the boom butt section
the track rollers
b.A long boom crane at a short radius and out of level by 300
can see a reduction incapacity by as much as:
50%
Crane stability is based on lever principle 2 / 4
What is the OSHA standard for cranes in construction industry?29 CFR-1926. Subpart CC
What are the requirements to be a crane inspector?Same as operator
What percentage of the crane chart is considered a critical lift?75%
A multi crane lift shall require Critical lift plan, reduction of gross capacity by 25% and one designated person in charge.
When doing a pick and carry, tire pressure must meet manufacturer's specifications
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The load chart is matched to the crane by:
Serial number
Where do you find recommended reeving for the hoist lines?Owner's manual
Not extending telescoping boom sections equally; what may occur?Longer section collapse
What are the broken wire removal requirements for rotation resistant wire rope?
- broken wires in 6 diameters or 4 in 30 diameters
How should wire rope be inspected during a frequent inspection?Visually
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