NCCCO Telescopic Boom Crane - Fixed Cab (TSS) Mobile Crane NCCER Fall
Answers 100% Pass In a two crane lift the center of gravity should be - Answer>>Closer to the crane with the greatest capacity For rubber-tired cranes working on rubber, the part of the load chart governed by stability is based on what % of the crane's capacity? - Answer>>75% As a general rue on tandem crane lifts neither crane should be loaded greater than what % of net capacity - Answer>>75% On long boom cranes, what is the major effect of abruptly stopping a rapid swing? - Answer>>Action may overturn the crane or collapse the boom The most important thing to remember when performing dual
crane lifts is: - Answer>>The cranes should not be loaded
beyond 75% of their rated capacity The total weight of a loaded personnel platform and related rigging shall not exceed what % of the rated capacity for the radius and configuration of a crane or derrick - Answer>>50%
Pre-operational inspections are necessary and required: -
Answer>>Enhance cranes safety by discovering discrepancies prior to operating. 1 / 2
If a crane has to be level to within 1% of grade, the maximum allowable variation in grade in a horizontal distance of 20' would
be: - Answer>>2.4''
On a standard running rope, how many broken wires are cause for considering replacement? - Answer>>3 broken wires in one strand in one lay On a standing rope, how many wires need to be broken at an end connections before replacing? - Answer>>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 wire in 6 rope diameters The lay length of a wire rope is defined as - Answer>>Distance of one strand as it makes one revolutions which of the following signifies the grade of steel used in wire rope? - Answer>>XIP (Extra Improved Plow Steel) Which end fitting has the highest efficiency rating? - Answer>>Swaged Sockets Which hitch provides the greatest lifting capacity? - Answer>>Basket Hitch
When placing a shackle on a crane hook the correct procedure is:
- Answer>>Place the shackle pin in the hook
- / 2
Its time to replace wire rope when_______% of the diameter of outside wire is worn away? - Answer>>5%