NCCCO MOBILE CRANE ACTUAL

NCCCO MOBILE CRANE (ACTUAL )

QUESTIONS WITH CORRECT VERIFIED

ANSWERS

• When may blocking (cribbing) be placed under outrigger

beams?

• When beams cannot be extended all the way out
• To increase capacity
• To improve stability
• Never

d.

• What is the result of placing timber blocking under the

tips of the tracks on a crawler crane?

• Decreases the permitted capacity of the crane
• Makes the crane more stable
• Reduces the capacity of the crane
• Makes the crane less stable

b.

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• According to ASME, what percentage of the

manufacturer's crane rating must not be exceeded if a load test is done on a repaired crane?

• 110%
• 100%
• 85%
• 75%

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

the track rollers

• It is through the centerline of the crane cab
• It is through the boom butt section

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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