NCCCO CORE EXAM WITH ANSWERS 8

NCCCO CORE EXAM WITH ANSWERS #8

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

Abruptly stopping a rapid swing on a long-boom mobile crane will produce what major effect? - correct 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: - correct 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? - correct 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? - correct answer Decreases stability.Backward stability of a mobile crane is tested in which configuration listed below? - correct answer Basic boom at minimum angle with no load Deflection of the boom while operating a mobile crane will increase? - correct answer Load Radius (Swings out) A sudden start or stop of the hoisting function while operating a mobile crane can

produce a: - correct answer dynamic load

Before lifting an occupied personnel platform on a job site, which of the following applies? - correct answer Use 50% of rated capacity, Trial lift to anticipated weight, Ensure rigging dedicated to platform only.According to OSHA 1926. 1431, while hoisting a personnel platform, what weather condition listed below will promptly discontinue the operation? - correct answer Dangerous If working near overhead power line and using a tag line, which type of rope is least conductive to electricity? - correct answer Polypropylene When working near power lines with the mobile crane, where does OSHA require caution stickers be installed on all equipment? - correct answer At operators station and

• on the outside of the equipment.

According to OSHA table T, what is the minimum clearance for 133kv power lines? - correct answer 10ft According to OSHA's table T, what clearance should a mobile crane IN TRANSIT keep while going under 445kv lines? - correct answer 16ft

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