NCCCO Core Exam Marking Scheme Updated

NCCCO Core Exam Marking Scheme Updated Which of the following is an accurate statement about luffing jibs? - ANSWER- It raises and lowers independent from the boom What is the weakest quadrant of a boom truck? - ANSWER- Front What effect would blocking up the ends of the tracks have on a crane? - ANSWER- It would increase capacity over the ends The tipping axis of a crawler crane is? - ANSWER- It depends if the idler or sprocket are offset from track rollers According to ASME B30.5 what percentage should not be exceeded on a mobile crane during a load test? - ANSWER- 100% From strongest to weakest put the following hitches in order - ANSWER- Basket, vertical, choker Which of the following should synthetic slings not be used around? - ANSWER- Acid How often should you inspect a running rope? - ANSWER- Daily The radius on a crane chart refers to? - ANSWER- Center of rotation to center of gravity of the load or hook What percentage is the manufacture rate of capacity of a mobile crane on outriggers? - ANSWER- 85% What percentage is the manufacture rated capacity of a rough terrain crane on rubber? - ANSWER- 75% What is Lay length? - ANSWER- The distance required for a strand to make a complete revolution around the rope What is one problem lubricating wire rope can cause? - ANSWER- Obstructed view when inspecting the rope What would What would call for a running rope to be taken out of service? - ANSWERSix randomly distributed broken wires and one Lay or three in one strand and one lay Which of these is known as a standing rope? - ANSWER- Pendant line If you are at a radius below the bold line on a load chart, which does that mean? - ANSWER- Tipping, stability To lift personnel, he must have an anti-two block on the crane? - ANSWER- True