NCCCO CORE STUDY SET QUIZ–
QUESTIONS AND ANSWERS
How many randomly distributed broken wires in rotation resistant hoist wire rope are
considered for replacement - ANSWER -2 broken wires in 6 rope diameters
Should the load be applied when determining the proper boom angle - ANSWER -Yes
When lifting loads on tires, cranes are rated at what percentage of tipping? - ANSWER -
75%
How does the effective weight of a stowed extension relate to the actual weight of the
extension - ANSWER -Lower than the actual weight
When load radius is between radii values, the operator must use the: - ANSWER -
Longer radius
Increasing the distance from the cranes center of gravity to the tipping axis will have
what effect on a mobile crane? - ANSWER -Increase stability
What is the minimum pitch diameter used for sheaves in a boom hoist reeling system -
ANSWER -Not less than 15 times rope diameter
Wire rope installed on most cranes - ANSWER -Right Regular Lay
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
Minimum design factor required for a right regular lay, boom or hoist wire rope -
ANSWER -3.5
How many broken wires are permitted at the end connection of a pendant 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 broken wires must be present in one strand of one lay for running wire rope
to be removed from service - ANSWER -3
A crane is at the point of instability when the cranes leverage on the load equals : -
ANSWER -100% of the loads leverage on crane
A sudden start or stop on the hoist function while operations can produce a : - ANSWER
-Dynamic load
QUESTIONS AND ANSWERS
How many randomly distributed broken wires in rotation resistant hoist wire rope are
considered for replacement - ANSWER -2 broken wires in 6 rope diameters
Should the load be applied when determining the proper boom angle - ANSWER -Yes
When lifting loads on tires, cranes are rated at what percentage of tipping? - ANSWER -
75%
How does the effective weight of a stowed extension relate to the actual weight of the
extension - ANSWER -Lower than the actual weight
When load radius is between radii values, the operator must use the: - ANSWER -
Longer radius
Increasing the distance from the cranes center of gravity to the tipping axis will have
what effect on a mobile crane? - ANSWER -Increase stability
What is the minimum pitch diameter used for sheaves in a boom hoist reeling system -
ANSWER -Not less than 15 times rope diameter
Wire rope installed on most cranes - ANSWER -Right Regular Lay
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
Minimum design factor required for a right regular lay, boom or hoist wire rope -
ANSWER -3.5
How many broken wires are permitted at the end connection of a pendant 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 broken wires must be present in one strand of one lay for running wire rope
to be removed from service - ANSWER -3
A crane is at the point of instability when the cranes leverage on the load equals : -
ANSWER -100% of the loads leverage on crane
A sudden start or stop on the hoist function while operations can produce a : - ANSWER
-Dynamic load
