NCCCO core 343 Questions with 100% Verified Correct Answers If taking sides strain on a boom what concerns the operator the most - Correct Answers Boom damage If a crane load chart has capacities listed in the shaded area this means that - Correct Answers If overloaded structural confidence will be compromised As the layers of rope on a drum increase the allowable line Pull wil - Correct Answers Decrease Of the following actions which one will most likely cause a side load condition - Correct Answers Abruptly starting or stopping the swing Cording to OSHA with any hook ball or attachment at its lowest point a minimum of blank reps must remain on the drum at all times - Correct Answers 2 What is the minimum distance of crane must maintain from powerlines rated below 50 KV - Correct Answers 10 feet What is the best procedures to follow if underground utilities are present - Correct Answers Contact utility company For boom is reeves eccentrically to the block the most common result would be - Correct Answers Twisting of the boom What is the safety factor for 6 x 19 IWRC wire rope - Correct Answers 3.5-1 What is the safety factor for rotation resistor wire rope - Correct Answers 5-1 What is the safety factor for rigging hardware - Correct Answers 5-1 What is the safety factor one hoisting personnel using IWRC wire Rope - Correct Answers 7-1 1 / 3
What is the safety factor hoisting personnel using rotation resistance wire rope - Correct Answers 10- 1 Unless the manufacturer states otherwise the wind speed to seize hoisting Shall be - Correct Answers 30 mph When hoisting personnel OSHA requires wind speed not to exceed - Correct Answers 20 mph Who has the responsibility of determining the correct weight of the load - Correct Answers Supervisor When an operator leave there a crane they must - Correct Answers Land load engage all locks and Pawls and lock machine When is it safe to work closer than alarm for distance from any powerline - Correct Answers When the utility company certifies that the lines are D energized When operating a crawler crane what is the most unstable allowable quadrant of operation - Correct Answers Side What is not a good location for crane set up - Correct Answers Above utilities If an operator arrives at a job site and the crane is already set up how would he checked the main an auxiliary breaks - Correct Answers Left the load a few inches off the ground and test the brakes Tipping capacities for crawler cranes are based on - Correct Answers 75% The term load radius is best defined as - Correct Answers The distance from the center of rotation of the crane to the center of gravity of the suspended load Should the load be applied when determining the proper boom angle - Correct Answers Yes When telescoping the boom section of a rubber tire which section should be telescoped first - Correct Answers All sections should be telescoped equally 2 / 3
Hooks must be discarded if a twist more than is found - Correct Answers 0 degrees Hooks must be discarded if a throat opening of more than is found - Correct Answers 5° Wire rope must be removed from service if any of the following conditions exist - Correct Answers Six randomly distributed broken wires Wear of more than 1/3 of the outside diameter three broken wires and one strand of one lay length When arriving first on the job site the operator should first determine the condition of the - Correct Answers Access roads Basket hitch is rated of a vertical hitch - Correct Answers 200% How many broken wires must be present in one strand of one lay for running wire rope to be removed from service - Correct Answers 3 How many broken wires must be present in rotation resistant wire rope to be removed from service - Correct Answers 2 in six diameters What is the minimum clearance needed between cranes counterweight and any obstacle - Correct Answers 2 feet To restrict access to a crane swing radius the operator must - Correct Answers Barricade the area around the crane You should always have at least how many wraps on A hoist drum - Correct Answers 2 When working around powerlines you must - Correct Answers Never stockpile material under powerlines Maintain the correct distance according to the rated KV Ground the crane with the proper grounding cable
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