NCCCO MOBILE CRANE COMPREHENSIVE
EXAMINATION TEST 2026 VERIFIED
QUESTIONS AND ANSWERS GRADED A+
●● 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
EXAMINATION TEST 2026 VERIFIED
QUESTIONS AND ANSWERS GRADED A+
●● 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
