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NCCCO CORE EXAM |
GUARANTEED ACCURATE
ANSWERS
Before leveling a mobile crane on outriggers, an operator should ensure:
- ACCURATE ANSWERS✔✔ 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? - ACCURATE ANSWERS✔✔ Keeping 90 degree angle between cylinder rod and pad What is the primary purpose fir a rooster sheave or auxiliary boom point sheave? - ACCURATE ANSWERS✔✔ 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? -
ACCURATE ANSWERS ✔✔ 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? -
ACCURATE ANSWERS ✔✔ 1 1 / 3
Type 1 rotation resistant hoist wire rope has a design factor of: -
ACCURATE ANSWERS ✔✔ 5 to 1 How many randomly distributed broken wires in rotation- resistant hoist wire rope are considered for replacement? - ACCURATE ANSWERS✔✔ 2 broken wires in 6 rope diameters The term net capacity is best defined by which of the terms listed below?
- ACCURATE ANSWERS✔✔ 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? - ACCURATE ANSWERS✔✔ Manufacturer When lifting loads on tires, mobile cranes are rated at what percentage of tipping? - ACCURATE ANSWERS✔✔ 75% How does the effective weight of a slowed extension relate to the actual weight of the extension? - ACCURATE ANSWERS✔✔ Higher than the actual weight.
When load radius is between radii values, the operator must use the: -
ACCURATE ANSWERS ✔✔ longer radius 2 / 3
Why should only approved attachments or extra counterweights provided by the manufacturer be placed on the rear of the crane? - ACCURATE ANSWERS ✔✔ 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: -
ACCURATE ANSWERS ✔✔ increases Abruptly stopping a rapid swing on a long-boom mobile crane will produce what major effect? - ACCURATE ANSWERS✔✔ 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: -
ACCURATE ANSWERS ✔✔ 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? - ACCURATE ANSWERS✔✔ 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? - ACCURATE ANSWERS✔✔ Decreases stability.
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