NCCCO MOBILE CRANE EXAM 2026
PRACTICE QUESTIONS AND ANSWERS
DETAILED REVIEW
◉ Overhead power lines. Answer: Obstructions in the crane's swing area
that must be considered.
◉ Ground surface conditions. Answer: Conditions such as slopes or
soft/uncompacted soil that affect crane setup.
◉ Controlling entity. Answer: The party primarily responsible for
ensuring adequate ground conditions for safe crane operations.
◉ Ground pressure information. Answer: Data that must be checked
against soil capacity to verify ground support for the crane.
◉ Level percentage for crane setup. Answer: A crane must be set up
within 1% of level for its load chart ratings to remain valid.
◉ Supporting materials under outrigger pads. Answer: Mats or blocking
used to reduce ground pressure by distributing the load.
◉ Swing radius safety. Answer: Accessible areas must be barricaded to
prevent anyone from entering and getting struck or crushed.
,◉ Partially extended outriggers. Answer: If one outrigger cannot be fully
extended, use the 'on rubber' load chart.
◉ Excavation placement rule. Answer: Keep outriggers or tracks back
from the edge at least the same distance as the depth of the excavation.
◉ Crane wheel positioning. Answer: The crane's wheels should be just
barely off the ground, relieved of the crane's weight.
◉ Sinking outrigger pad response. Answer: If an outrigger pad begins to
sink, the operator should stop the lift and re-set the crane on more stable
ground.
◉ Crawler crane ground bearing pressure. Answer: Moving a crawler
crane from soft ground to hard ground increases the ground pressure.
◉ Timber blocking under crawler tracks. Answer: Placing timber
blocking only under the tips of tracks will not support the entire track.
◉ Make the crane more stable. Answer: C. Make the crane less stable
(reducing its effective footprint)
, ◉ Minimum clearance for cranes near power lines up to 50 kV. Answer:
A. 10 feet (3 m)
◉ Clearance distance for extremely high-voltage lines over 750 kV.
Answer: C. 45 feet
◉ Crane assembly and disassembly supervision. Answer: C. Directed by
a qualified Assembly/Disassembly (A/D) director who understands the
process and hazards
◉ Pre-lift requirements for crane operations. Answer: B. Review the
planned lift requirements, load weight, and site conditions with the site
supervisor or lift director
◉ Setting up a crane on a slope. Answer: B. Use cribbing or blocking
under the outriggers or tracks to level the crane as much as possible
(within 1% level) before lifting
◉ Working near energized power lines. Answer: B. If it's necessary to
work closer than the mandated clearance to live power lines, the lines
must be de-energized and grounded or insulated, and a dedicated spotter
should be used.
◉ Standard hand signals for crane operation. Answer: C. Boom up
PRACTICE QUESTIONS AND ANSWERS
DETAILED REVIEW
◉ Overhead power lines. Answer: Obstructions in the crane's swing area
that must be considered.
◉ Ground surface conditions. Answer: Conditions such as slopes or
soft/uncompacted soil that affect crane setup.
◉ Controlling entity. Answer: The party primarily responsible for
ensuring adequate ground conditions for safe crane operations.
◉ Ground pressure information. Answer: Data that must be checked
against soil capacity to verify ground support for the crane.
◉ Level percentage for crane setup. Answer: A crane must be set up
within 1% of level for its load chart ratings to remain valid.
◉ Supporting materials under outrigger pads. Answer: Mats or blocking
used to reduce ground pressure by distributing the load.
◉ Swing radius safety. Answer: Accessible areas must be barricaded to
prevent anyone from entering and getting struck or crushed.
,◉ Partially extended outriggers. Answer: If one outrigger cannot be fully
extended, use the 'on rubber' load chart.
◉ Excavation placement rule. Answer: Keep outriggers or tracks back
from the edge at least the same distance as the depth of the excavation.
◉ Crane wheel positioning. Answer: The crane's wheels should be just
barely off the ground, relieved of the crane's weight.
◉ Sinking outrigger pad response. Answer: If an outrigger pad begins to
sink, the operator should stop the lift and re-set the crane on more stable
ground.
◉ Crawler crane ground bearing pressure. Answer: Moving a crawler
crane from soft ground to hard ground increases the ground pressure.
◉ Timber blocking under crawler tracks. Answer: Placing timber
blocking only under the tips of tracks will not support the entire track.
◉ Make the crane more stable. Answer: C. Make the crane less stable
(reducing its effective footprint)
, ◉ Minimum clearance for cranes near power lines up to 50 kV. Answer:
A. 10 feet (3 m)
◉ Clearance distance for extremely high-voltage lines over 750 kV.
Answer: C. 45 feet
◉ Crane assembly and disassembly supervision. Answer: C. Directed by
a qualified Assembly/Disassembly (A/D) director who understands the
process and hazards
◉ Pre-lift requirements for crane operations. Answer: B. Review the
planned lift requirements, load weight, and site conditions with the site
supervisor or lift director
◉ Setting up a crane on a slope. Answer: B. Use cribbing or blocking
under the outriggers or tracks to level the crane as much as possible
(within 1% level) before lifting
◉ Working near energized power lines. Answer: B. If it's necessary to
work closer than the mandated clearance to live power lines, the lines
must be de-energized and grounded or insulated, and a dedicated spotter
should be used.
◉ Standard hand signals for crane operation. Answer: C. Boom up
