Examination
180 minutes
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NCCCO - National Commission for the Certification of
Crane Operators 2024-2025
NCCCO Tower Crane Operator Certification Exam
Questions and Answers | 100% Pass Guaranteed |
Graded A+ |
Read All Instructions Carefully and Answer All the
Questions Correctly Good Luck: -
What is the single most dangerous thing an operator
can do to determine whether a crane can handle a
load? - =Answer>> Use tipping as a guide for capacity
More than 75% of chart capacity, close to power lines,
hoisting personnel, 2 crane lift, special procedures. -
=Answer>> Critical Lift
The angle of cable from center of sheave to inside walls
of hoist drum. - =Answer>> Fleet angle.
- =Answer>> D/d ratio
When two cables touch (multiple parts of line spin and
make contact) - =Answer>> Cabling
Even parts of line, shorter boom length, greater sheave
diameter. - =Answer>> Ways to reduce cabling
The amount of force, in pounds that a winch can pull
continously - =Answer>> Permissible line pull
What class is 6x25 wire rope. - =Answer>> IWRC
6x19
Safety factor for regular lay running rope working -
=Answer>> 3.5 to 1
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Safety factor for regular lay running rope erecting -
=Answer>> 3 to 1
Safety factor for rotation resistant wire rope -
=Answer>> 5 to 1
How many wraps must always remain on a load hoist or
boom hoist drum? - =Answer>> Two
What is the minimum length of tail on a wedge socket
when using rotation resistant wire rope. - =Answer>>
6 inches or 20x diameter.
Bird cagin, burns, over picking, missing tags, corrosion,
core petrision, high strand - =Answer>> Reasons for
taking wire rope out of service other than wear or
broken wires?
5% wear in critical areas, 10% any, twist, cracked, 5%
in throat, not more than 1/4. - =Answer>> Criteria for
taking a load hook out of service.
What is the efficiency of a wedge socket? -
=Answer>> 80%
What is the efficiency of a flemish eye? - =Answer>>
90%
What is the efficiency of a spelter socket? -
=Answer>> 100%
How are parts of line determined? - =Answer>> Gross
weight/ line pull of suspended load/ SWL or PLP
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