Nccco Core Exam Questions With All Answers

Nccco Core Exam Questions With All Answers If taking sides strain on a boom what concerns the operator the most - ANSWER- Boom damage If a crane load chart has capacities listed in the shaded area this means that - ANSWER- If overloaded structural confidence will be compromised As the layers of rope on a drum increase the allowable line Pull wil - ANSWER- Decrease Of the following actions which one will most likely cause a side load condition - ANSWER- 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 - ANSWER- 2 What is the minimum distance of crane must maintain from powerlines rated below 50 KV - ANSWER- 10 feet What is the best procedures to follow if underground utilities are present - ANSWER- Contact utility company For boom is reeves eccentrically to the block the most common result would be - ANSWER- Twisting of the boom What is the safety factor for 6 x 19 IWRC wire rope - ANSWER- 3.5-1 What is the safety factor for rotation resistor wire rope - ANSWER- 5-1 What is the safety factor for rigging hardware - ANSWER- 5-1 What is the safety factor one hoisting personnel using IWRC wire Rope - ANSWER- 7-1 What is the safety factor hoisting personnel using rotation resistance wire rope - ANSWER- 10-1 Unless the manufacturer states otherwise the wind speed to seize hoisting Shall be - ANSWER- 30 mph When hoisting personnel OSHA requires wind speed not to exceed - ANSWER- 20 mph Who has the responsibility of determining the correct weight of the load - ANSWER- Supervisor When an operator leave there a crane they must - ANSWER- Land load engage all locks and Pawls and lock machine When is it safe to work closer than alarm for distance from any powerline - ANSWER- 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 - ANSWER- Side What is not a good location for crane set up - ANSWER- 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 - ANSWER- Left the load a few inches off the ground and test the brakes Tipping capacities for crawler cranes are based on - ANSWER- 75% The term load radius is best defined as - ANSWER- 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 - ANSWER- Yes When telescoping the boom section of a rubber tire which section should be telescoped first - ANSWER- All sections should be telescoped equally Hooks must be discarded if a twist more than is found - ANSWER- 0 degrees Hooks must be discarded if a throat opening of more than is found - ANSWER- 5° Wire rope must be removed from service if any of the following conditions exist - ANSWER- 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 - ANSWER- Access roads Basket hitch is rated of a vertical hitch - ANSWER- 200% How many broken wires must be present in one strand of one lay for running wire rope to be removed from service - ANSWER- 3 How many broken wires must be present in rotation resistant wire rope to be removed from service - ANSWER- 2 in six diameters What is the minimum clearance needed between cranes counterweight and any obstacle - ANSWER- 2 feet To restrict access to a crane swing radius the operator must - ANSWER- Barricade the area around the crane You should always have at least how many wraps on A hoist drum - ANSWER- 2 When working around powerlines you must - ANSWER- Never stockpile material under powerlines Maintain the correct distance according to the rated KV Ground the crane with the proper grounding cable Boom angle is best described as - ANSWER- The angle between the loaded boom and the horizontal What is the best procedure to follow when underground utilities may be present - ANSWER- Contact local utility company When using cable or nylon spreaders it is important to remember - ANSWER- The lower the spreader angle the greater the tension When is spinning load presents a danger the operator should - ANSWER- Use a tagline Parts of line means - ANSWER- The number of lines running through the load block A sudden start or stop while operating a crane produces - ANSWER- A dynamic load What percent of a cranes rated capacity is it classified as a critical lift - ANSWER- 75% During disassembly of a long boom the hog lines are connected on a maximum cantilever point and the boom is slightly lifted off the ground which pins are to be removed next - ANSWER- The bottom pins ahead of the cantilever point If you were to make a left using a four legged bridle how many legs are you going to calculate the load - ANSWER- 3 According to OSHA all cranes equipped with a luffing jib must have - ANSWER- Check valve