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Mobile Crane NCCER 2025, crane operator exam, NCCER 100 questions And answers, rigging and lifting, crane safety test, equipment inspection, verified NCCER answers
Which type core provides the maximum flexibility to wire rope?
- ANSWER-Fiber core
Which one of the following wire ropes should not be used in mulit-part reeving because it rapidly deteriorates usually internally with repeated bending? - ANSWER-19x7
To determine how may cubic feet are in an object you must: -
ANSWER-Multiply by the length by the width by the height
For a truck crane to maintain a margin of safety against tipping
backwards: - ANSWER-Weight on lift carrier must not be less
than 15% of total crane weight
Which of the following is classified as a standing rope? - ANSWER-Pendant line 1 / 3
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Working radius is defined as the distance from the: - ANSWER-
Center of rotation of the crane to the center of gravity of the load
The dead-end of the wire rope above the wedge socket must extend minimum of 6 times the rope diameter of? - ANSWER- 6''
As you boom down the leverage of the load on the crane will - ANSWER-Increase
One of the most severe effects of being out of level is: -
ANSWER-Side load develops in the boom
When Anti-two block device is activated what crane function will NOT work? - ANSWER-Boom down
What is required of the operator if the load weight is not accurately known? - ANSWER-Determine that the load weight does not exceed the crane's capacity before attempting the lift.
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The distance from the center of rotation to the center line of a
freely suspended hoist line is known as the: - ANSWER-Radius
What does two blocking mean - ANSWER-When the load handling device make contact with the upper sheaves
Us multi part reeving with the load block when: - ANSWER-the
line pull is less than the load
what effect does rapid hoist acceleration have on the crane? - ANSWER-Produces hook loads greater than the actual load
it is not recommended to use slings below_____ angles? - ANSWER-30 degree
To prevents two-blocking the operator must lower the hoist line
or lines when performing which functions: - ANSWER-A.
Booming down
- Extending the boom
- Working within the 12 inch minimum of boom tip
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