NCCCO CORE EXAM WITH ANSWERS 2025 #8
Before leveling a mobile crane on outriggers, an operator should ensure: - correct
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? - correct answer Keeping 90 degree angle between cylinder rod
and pad
What is the primary purpose fir a rooster sheave or auxiliary boom point sheave? -
correct 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? - correct 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? - correct answer 1
Type 1 rotation resistant hoist wire rope has a design factor of: - correct answer 5 to 1
How many randomly distributed broken wires in rotation- resistant hoist wire rope are
considered for replacement? - correct answer 2 broken wires in 6 rope diameters
The term net capacity is best defined by which of the terms listed below? - correct
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? - correct answer Manufacturer
When lifting loads on tires, mobile cranes are rated at what percentage of tipping? -
correct answer 75%
How does the effective weight of a slowed extension relate to the actual weight of the
extension? - correct answer Higher than the actual weight.
When load radius is between radii values, the operator must use the: - correct answer
longer radius
Why should only approved attachments or extra counterweights provided by the
manufacturer be placed on the rear of the crane? - correct 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: - correct answer increases
, Abruptly stopping a rapid swing on a long-boom mobile crane will produce what major
effect? - correct 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: - correct 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? - correct 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? - correct answer Decreases stability.
Backward stability of a mobile crane is tested in which configuration listed below? -
correct answer Basic boom at minimum angle with no load
Deflection of the boom while operating a mobile crane will increase? - correct answer
Load Radius (Swings out)
A sudden start or stop of the hoisting function while operating a mobile crane can
produce a: - correct answer dynamic load
Before lifting an occupied personnel platform on a job site, which of the following
applies? - correct 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? - correct answer
Dangerous
If working near overhead power line and using a tag line, which type of rope is least
conductive to electricity? - correct answer Polypropylene
When working near power lines with the mobile crane, where does OSHA require
caution stickers be installed on all equipment? - correct 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? -
correct answer 10ft
According to OSHA's table T, what clearance should a mobile crane IN TRANSIT keep
while going under 445kv lines? - correct answer 16ft
Before leveling a mobile crane on outriggers, an operator should ensure: - correct
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? - correct answer Keeping 90 degree angle between cylinder rod
and pad
What is the primary purpose fir a rooster sheave or auxiliary boom point sheave? -
correct 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? - correct 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? - correct answer 1
Type 1 rotation resistant hoist wire rope has a design factor of: - correct answer 5 to 1
How many randomly distributed broken wires in rotation- resistant hoist wire rope are
considered for replacement? - correct answer 2 broken wires in 6 rope diameters
The term net capacity is best defined by which of the terms listed below? - correct
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? - correct answer Manufacturer
When lifting loads on tires, mobile cranes are rated at what percentage of tipping? -
correct answer 75%
How does the effective weight of a slowed extension relate to the actual weight of the
extension? - correct answer Higher than the actual weight.
When load radius is between radii values, the operator must use the: - correct answer
longer radius
Why should only approved attachments or extra counterweights provided by the
manufacturer be placed on the rear of the crane? - correct 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: - correct answer increases
, Abruptly stopping a rapid swing on a long-boom mobile crane will produce what major
effect? - correct 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: - correct 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? - correct 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? - correct answer Decreases stability.
Backward stability of a mobile crane is tested in which configuration listed below? -
correct answer Basic boom at minimum angle with no load
Deflection of the boom while operating a mobile crane will increase? - correct answer
Load Radius (Swings out)
A sudden start or stop of the hoisting function while operating a mobile crane can
produce a: - correct answer dynamic load
Before lifting an occupied personnel platform on a job site, which of the following
applies? - correct 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? - correct answer
Dangerous
If working near overhead power line and using a tag line, which type of rope is least
conductive to electricity? - correct answer Polypropylene
When working near power lines with the mobile crane, where does OSHA require
caution stickers be installed on all equipment? - correct 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? -
correct answer 10ft
According to OSHA's table T, what clearance should a mobile crane IN TRANSIT keep
while going under 445kv lines? - correct answer 16ft
