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NCCCO Telescopic Boom Crane- Fall Exam Review Questions and Answers 100% Pass Working radius is defined as the distance from? - Answer>>Center of rotation of the crane to the center of gravity of the load At what percentage of tipping are truck mounted cranes on outriggers which are fully extended and set rated? - Answer>>85% What is the definition of boom length? - Answer>>Center of boom heel pin or foot pin to the center of the boom tip sheave Wire rope clips used in conjunction with wedge sockets must be attached to what? - Answer>>The dead end of the rope The most common hoist rope in general use is? - Answer>>Right regular lay Where is the center of rotation of a crane located? - Answer>>Through the center of the swing circle On a standard running rope how many randomly distributed broken wires in one strand is cause for considering replacement?
- Answer>>Three broken wires in one strand in one lay
On a standing rope How many wires need to be broken at an end connection before replacing - Answer>>2 1 / 2
According to ASME B30.5 mobile crane standard, how many randomly distributed broken wires in rotation resistant rope is cause for considering replacement of the rope? - Answer>>2 broken wires in 6 rope diameters How often should all running ropes in-service be visually inspected? - Answer>>Once each working day The lay length of a wire rope is defined as what? - Answer>>Distance it takes for one strand to make a complete revolution Greater tension is exerted on slings attached at? - Answer>>Low angles What is the correct procedure when placing a shackle on a crane hook? - Answer>>Place the shackle pin in the hook Which hitch provides the greatest lifting capacity? - Answer>>Basket hitch It is time to replace wire rope when what diameter of outside wires is worn away? - Answer>>1/3 Never use a fiber core wire rope when working temperatures exceed what? - Answer>>180° Which type core provides the maximum flexibility to wire rope? - Answer>>Fiber core Which of the following is classified as a standing rope? - Answer>>Pendant lines
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