NCCCO MOBILE CRANE COMPREHENSIVE
EXAM PREP QUESTIONS AND SOLUTIONS
VERIFIED STUDY RESOURCE
●● Personnel Platforms (other than Rotation Resistant)
Answer: 7:1
●● Personnel Platforms (Rotation Resistant)
Answer: 10:1
●● Standing Rope/Pendants
Answer: 3:1
●● Rotation-resistant rope
Answer: 5:1
●● Type 1 rotation resistant rope is constructed to have little or no
tendency to rotate/or transmits little or no torque. How many outer
strands comprised of how many layers of strands does the direction of
the outer strands oppose to that of the underlying layer?
Answer: At least 15 outer strands comprised of at least three layers of
strands laid helically.
,●● Type 2 rotation resistant rope is constructed to have significant
resistance to rotation. How many outer strands comprised of how many
layers of strands with the direction of the outer strands opposed to that of
the underlying layer?
Answer: At least 10 outer strands comprised of 2 or more layers of
strands laid helically.
●● Type 3 rotation resistant rope constructed to have limited resistance
to rotation has how many outer strands, and compromised of how many
layers of strands in the direction of the outer strands opposed to that of
the underlying layer?
Answer: No more than 9 outer strands comprised of 2 layers of strands
laid helically.
●● What must Type 1 rotation resistant rope have a design factor of?
Answer: No less than 5
●● What must Type 2 & 3 rotation resistant rope with less than 5 must
not be used for?
Answer: Duty cycle operations or repetitive lifts.
●● What must the Minimum Drum/Sheave Pitch Diameter of Boom
Hoist's be?
Answer: 15:1
, ●● What must the Minimum Drum/Sheave Pitch Diameter be for Load
Hoist's?
Answer: 18:1
●● What must the Minimum Sheave Pitch Diameter be for Load
Blocks?
Answer: 16:1
●● What is the minimum that the hoist flange shall extend over the top
layer of wire rope at all times?
Answer: 1 1/2 rope diameter or 1/2 inch. Whichever is greater.
●● What happens when there are more layers on the drum?
Answer: Line pull decreases
●● What is the most common wire rope used on cranes?
Answer: Right Regular Lay
●● What is the repair period for Category 1 safety devices w/temporary
alternative measures?
Answer: 7 days
EXAM PREP QUESTIONS AND SOLUTIONS
VERIFIED STUDY RESOURCE
●● Personnel Platforms (other than Rotation Resistant)
Answer: 7:1
●● Personnel Platforms (Rotation Resistant)
Answer: 10:1
●● Standing Rope/Pendants
Answer: 3:1
●● Rotation-resistant rope
Answer: 5:1
●● Type 1 rotation resistant rope is constructed to have little or no
tendency to rotate/or transmits little or no torque. How many outer
strands comprised of how many layers of strands does the direction of
the outer strands oppose to that of the underlying layer?
Answer: At least 15 outer strands comprised of at least three layers of
strands laid helically.
,●● Type 2 rotation resistant rope is constructed to have significant
resistance to rotation. How many outer strands comprised of how many
layers of strands with the direction of the outer strands opposed to that of
the underlying layer?
Answer: At least 10 outer strands comprised of 2 or more layers of
strands laid helically.
●● Type 3 rotation resistant rope constructed to have limited resistance
to rotation has how many outer strands, and compromised of how many
layers of strands in the direction of the outer strands opposed to that of
the underlying layer?
Answer: No more than 9 outer strands comprised of 2 layers of strands
laid helically.
●● What must Type 1 rotation resistant rope have a design factor of?
Answer: No less than 5
●● What must Type 2 & 3 rotation resistant rope with less than 5 must
not be used for?
Answer: Duty cycle operations or repetitive lifts.
●● What must the Minimum Drum/Sheave Pitch Diameter of Boom
Hoist's be?
Answer: 15:1
, ●● What must the Minimum Drum/Sheave Pitch Diameter be for Load
Hoist's?
Answer: 18:1
●● What must the Minimum Sheave Pitch Diameter be for Load
Blocks?
Answer: 16:1
●● What is the minimum that the hoist flange shall extend over the top
layer of wire rope at all times?
Answer: 1 1/2 rope diameter or 1/2 inch. Whichever is greater.
●● What happens when there are more layers on the drum?
Answer: Line pull decreases
●● What is the most common wire rope used on cranes?
Answer: Right Regular Lay
●● What is the repair period for Category 1 safety devices w/temporary
alternative measures?
Answer: 7 days
