NCCCO CORE exam - answers

NCCCO CORE exam - answers How can the LMI's boom length or load radius reading be verified? - ANSWER>>Actual measurements On mobile cranes, what does the boom angle indicator show the operator? - ANSWER>>Angle of boom to horizontal

What is the device called that automatically stops the boom when it nears the cranes maximum angle? - ANSWER>>Boom hoist limiting

When the number of layers of wire rope on a drum increases the: - ANSWER>>Allowable line pull decreases

On a mobile crane, side loading of the boom could be caused by which of the following? - ANSWER>>Starting or stopping the swing too rapidly

Which person listed below, has the responsibility for determining the correct weight of a load? - ANSWER>>Lift Director

What must an operator do when an operator leaves the controls of the crane from an extended period of time? - ANSWER>>Apply all brakes and dogs, and lower the load to the ground 1 / 3

When should a tag line be used, during the hoisting of material? - ANSWER>>When the rotation of the load would be dangerous

What percentage of the rated capacity of a mobile crane must be used when lifting with two cranes attached to the same load? - ANSWER>>75%

When lifting a load with two mobile cranes, it is very important to: - ANSWER>>Keep the hoist lines of both cranes vertical What is the minimum design factor required for a regular lay, boom or hoist wire rope? - ANSWER>>3.5

It is important to know when lubricating crane hoist wire rope, that the lubricant must: - ANSWER>>not hinder visual inspection

How often is the competent person required to inspect the running wire ropes on a mobile crane? - ANSWER>>Each shift

On mobile cranes, how many broken wires must be present in one strand of one lay for running wire rope to be removed from service? - ANSWER>>3 2 / 3

According to OSHA, what is the minimum number of full wraps of wire rope that must remain on hoist drums in all service conditions? - ANSWER>>2

On whose recommendations should a mobile crane preventative maintenance program be developed? - ANSWER>>Crane manufacturer

On a mobile crane, the measurement for the load radius in this distance from the center of gravity of the suspended load to the: - ANSWER>>Center of rotation of the crane

On a mobile crane, should the load be applied when determining the proper boom angle? - ANSWER>>Yes

On a mobile cranes range digram, boom length and boom angle can be used to determine? - ANSWER>>Load radius

On a mobile crane, what is the weight of the slowed jib that is deducted in load chart calculations called? - ANSWER>>Effective weight

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