NCCCO Mobile Crane Updated Actual Exam
Question and Answer (2026/2027) | 100%
Verified Answers
• Operating a mobile crane with a long boom, on uneven ground, what support
condition should be considered? -✓✓ Keeping 90 degree angle between cylinder
rod and pad
• What is the primary purpose fir a rooster sheave or auxiliary boom point sheave?
-✓✓ 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? -✓✓ 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? -✓✓ 1
• Type 1 rotation resistant hoist wire rope has a design factor of: -✓✓ 5 to 1
• How many randomly distributed broken wires in rotation- resistant hoist wire
rope are considered for replacement? -✓✓ 2 broken wires in 6 rope diameters
• The term net capacity is best defined by which of the terms listed below? -✓✓
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? -✓✓ Manufacturer
• When lifting loads on tires, mobile cranes are rated at what percentage of tipping?
-✓✓ 75%
• How does the effective weight of a slowed extension relate to the actual weight of
the extension? -✓✓ Higher than the actual weight.
• When load radius is between radii values, the operator must use the: -✓✓ longer
radius
, • Why should only approved attachments or extra counterweights provided by the
manufacturer be placed on the rear of the crane? -✓✓ 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: -✓✓ increases
• Abruptly stopping a rapid swing on a long-boom mobile crane will produce what
major effect? -✓✓ 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: -✓✓ 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? -✓✓ 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? -✓✓ Decreases stability.
• Backward stability of a mobile crane is tested in which configuration listed
below? -✓✓ Basic boom at minimum angle with no load
• Deflection of the boom while operating a mobile crane will increase? -✓✓ Load
Radius (Swings out)
• A sudden start or stop of the hoisting function while operating a mobile crane can
produce a: -✓✓ dynamic load
• Before lifting an occupied personnel platform on a job site, which of the
following applies? -✓✓ 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? -✓✓
Dangerous
Question and Answer (2026/2027) | 100%
Verified Answers
• Operating a mobile crane with a long boom, on uneven ground, what support
condition should be considered? -✓✓ Keeping 90 degree angle between cylinder
rod and pad
• What is the primary purpose fir a rooster sheave or auxiliary boom point sheave?
-✓✓ 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? -✓✓ 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? -✓✓ 1
• Type 1 rotation resistant hoist wire rope has a design factor of: -✓✓ 5 to 1
• How many randomly distributed broken wires in rotation- resistant hoist wire
rope are considered for replacement? -✓✓ 2 broken wires in 6 rope diameters
• The term net capacity is best defined by which of the terms listed below? -✓✓
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? -✓✓ Manufacturer
• When lifting loads on tires, mobile cranes are rated at what percentage of tipping?
-✓✓ 75%
• How does the effective weight of a slowed extension relate to the actual weight of
the extension? -✓✓ Higher than the actual weight.
• When load radius is between radii values, the operator must use the: -✓✓ longer
radius
, • Why should only approved attachments or extra counterweights provided by the
manufacturer be placed on the rear of the crane? -✓✓ 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: -✓✓ increases
• Abruptly stopping a rapid swing on a long-boom mobile crane will produce what
major effect? -✓✓ 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: -✓✓ 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? -✓✓ 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? -✓✓ Decreases stability.
• Backward stability of a mobile crane is tested in which configuration listed
below? -✓✓ Basic boom at minimum angle with no load
• Deflection of the boom while operating a mobile crane will increase? -✓✓ Load
Radius (Swings out)
• A sudden start or stop of the hoisting function while operating a mobile crane can
produce a: -✓✓ dynamic load
• Before lifting an occupied personnel platform on a job site, which of the
following applies? -✓✓ 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? -✓✓
Dangerous
