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NCCCO CORE EXAM QUESTIONS WITH CORRECT ANSWERS
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NCCCO CORE EXAM QUESTIONS WITH CORRECT ANSWERS
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NCCCO CORE EXAM QUESTIONS WITHCORRECT ANSWERS
Before leveling a mobile crane on outriggers, an operator should ensure: - Answer-there
is no weight of the crane bearing on any tires
Operating a mobile crane with a long boom, on uneven ground, what support condition
should be considered? - Answer-Keeping 90 degree angle between cylinder rod and
pad
What is the primary purpose fir a rooster sheave or auxiliary boom point sheave? -
Answer-Separate the boom hoist lines
How many randomly broken wires in a lay length must there be on a mobile cranes
hoist line, before it should be removed from service? - Answer-6
On a mobile crane, how many broken wires are permitted at the end connection of a
pendent before it must be taken out of service? - Answer-1
Type 1 rotation resistant hoist wire rope has a design factor of: - Answer-5 to 1
How many randomly distributed broken wires in rotation- resistant hoist wire rope are
considered for replacement? - Answer-2 broken wires in 6 rope diameters
The term net capacity is best defined by which of the terms listed below? - Answer-
Gross capacity minus capacity deductions
Mobile cranes that are set up on barges, shall have a list chart provided by which of the
entities listed below? - Answer-Manufacturer
When lifting loads on tires, mobile cranes are rated at what percentage of tipping? -
Answer-75%
How does the effective weight of a slowed extension relate to the actual weight of the
extension? - Answer-Higher than the actual weight.
When load radius is between radii values, the operator must use the: - Answer-longer
radius
Why should only approved attachments or extra counterweights provided by the
manufacturer be placed on the rear of the crane? - Answer-They could cause a
backward stability problem.
A mobile crane's jib is offset 15º versus its original 0º offset, but the boom angle
remains unchanged. In this situation, the load radius: - Answer-increases
, Abruptly stopping a rapid swing on a long-boom mobile crane will produce what major
effect? - Answer-Collapsing the boom.
When determining the position to a mobile crane should be left in over night, when high
winds in the forecast the operator should: - Answer-Follow the manufacturers
recommendations.
If a mobile crane is NOT set-up level and the operator swings the load from the high
side to the low side, what effect will that have on the radius? - Answer-The radius
increase.
Increasing the distance from the crane's center of gravity to the tipping axis will have
what effect on the mobile crane? - Answer-Decreases stability.
Backward stability of a mobile crane is tested in which configuration listed below? -
Answer-Basic boom at minimum angle with no load
Deflection of the boom while operating a mobile crane will increase? - Answer-Load
Radius (Swings out)
A sudden start or stop of the hoisting function while operating a mobile crane can
produce a: - Answer-dynamic load
Before lifting an occupied personnel platform on a job site, which of the following
applies? - Answer-Use 50% of rated capacity, Trial lift to anticipated weight, Ensure
rigging dedicated to platform only.
According to OSHA 1926. 1431, while hoisting a personnel platform, what weather
condition listed below will promptly discontinue the operation? - Answer-Dangerous
If working near overhead power line and using a tag line, which type of rope is least
conductive to electricity? - Answer-Polypropylene
When working near power lines with the mobile crane, where does OSHA require
caution stickers be installed on all equipment? - Answer-At operators station and 2 on
the outside of the equipment.
According to OSHA table T, what is the minimum clearance for 133kV power lines? -
Answer-10ft
According to OSHA's table T, what clearance should a mobile crane IN TRANSIT keep
while going under 445kV lines? - Answer-16ft
According to OSHA when is it safe to hoist loads with a mobile crane below energized
power lines? - Answer-When the fully extended boom can't reach the prohibited zone.
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