NCCCO CORE Exam Questions With
100% Accurate Answers Rated A+
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.
100% Accurate Answers Rated A+
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.
