Tower Crane Exam set 3 Questions with Correct Answers

A. by gradually increasing and decreasing speed Correct Answer How must tower crane movements be performed? A. by gradually increasing and decreasing speed B. as quick as the job dictates C. as slow as the job dictates D. at the speed designated by the site supervisor A. to limit side loading of the jib Correct Answer Why must the hoist line sheave be centered over the center of gravity of a load? A. to limit side loading of the jib B. to limit shock loading of the jib and tower assembly C. to limit torquing of the trolley and wire rope D. to limit twisting of the hook assembly and safety latch D. starting and stopping the swing too quickly Correct Answer Exceeding the rated load radius can be caused by what improper action? A. excess hoisting speed B. lowering the load too fast C. bringing the load to a rapid stop D. starting and stopping the swing too quickly D. never Correct Answer When is it allowed to side load a tower crane jib? A. when dragging a load on wheels or rollers B. when the hoist line is LESS than five (5) degrees out of plumb C. when the load is Less than 25 percent of capacity D. never B. over torque of the mast sections Correct Answer Each tower crane must contain a means which will cause the jib swing to be started and stopped gradually to prevent _________ . A. the swing motor from overheating B. over torque of the mast sections C. distortion of the slewing gear D. excess side loading of the jib and pendants C. 105 percent Correct Answer According to CAL-OSHA, tower cranes must be equipped with an automatic stop for the hoist that activates at what percent of rated load? A. 90 percent B. 100 percent C. 105 percent D. 110 percent B. 100 percent Correct Answer According to CAL-OSHA, all tower cranes must have an audible alarm that activates at what percent of rated load?