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NCCCO CORE EXAM | 119 QUESTIONS | WITH COMPLETE SOLUTIONS!!
Before leveling a mobile crane on outriggers, an operator should ensure: - (answer)there is no weight of the crane bearing on any tires
Operating a mobile crane with a long boom, on uneven ground, what support condition should be considered? - (answer)Keeping 90 degree angle between cylinder rod and pad
What is the primary purpose fir a rooster sheave or auxiliary boom point sheave? - (answer)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? - (answer)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? - (answer)1
Type 1 rotation resistant hoist wire rope has a design factor of: - (answer)5 to 1
How many randomly distributed broken wires in rotation- resistant hoist wire rope are considered for replacement? - (answer)2 broken wires in 6 rope diameters
The term net capacity is best defined by which of the terms listed below? - (answer)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? - (answer)Manufacturer
When lifting loads on tires, mobile cranes are rated at what percentage of tipping? - (answer)75%
How does the effective weight of a slowed extension relate to the actual weight of the extension? - (answer)Higher than the actual weight. 1 / 2
NCCCO CORE EXAM | 119 QUESTIONS | WITH COMPLETE SOLUTIONS!!
When load radius is between radii values, the operator must use the: - (answer)longer radius
Why should only approved attachments or extra counterweights provided by the manufacturer be placed on the rear of the crane? - (answer)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: - (answer)increases
Abruptly stopping a rapid swing on a long-boom mobile crane will produce what major effect? - (answer)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: - (answer)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? - (answer)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? - (answer)Decreases stability.
Backward stability of a mobile crane is tested in which configuration listed below? - (answer)Basic boom at minimum angle with no load
Deflection of the boom while operating a mobile crane will increase? - (answer)Load Radius (Swings out)
A sudden start or stop of the hoisting function while operating a mobile crane can produce a: - (answer)dynamic load
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