Tower Cranes NCCCO Study Guide Final Exam with Verified Solutions

Tower Cranes NCCCO Study Guide Final Exam with Verified Solutions T or F Very few areas in either the US or Canada require certification to operate a tower crane - CORRECT ANSWER-false T or F Self erecting tower cranes are easier to erect than a conventional tower crane, but erection time takes longer - CORRECT ANSWER-false How does the crane rotate with a fixed tower base? - CORRECT ANSWER-slewing ring beneath the jib T or F A mono type of tower can be either fixed or slewing - CORRECT ANSWER-true What best describes a tower crane saddle jib? - CORRECT ANSWER-rolling trolley and supported by a fixed pendant lines What best describes a tower crane front luffing jib? - CORRECT ANSWER-stationary trolley and jib pivots at front of tower T or F In general, tower cranes are designed to have the same lifting capacity regardless of the jib length and load radius - CORRECT ANSWER-false T or F A tower crane only requires one identification plate. All components are included in that one ID plate - CORRECT ANSWER-false T or F All tower cranes manufactured by a company will have a common manufactuer's manual that is generic to all cranes made by that company - CORRECT ANSWER-false Of the following, who must sign a tower crane log book? - CORRECT ANSWERoperator, service mechanic , supervisor, all of above What is the first step taken before erecting a tower crane? - CORRECT ANSWERprepare a site plan T or F Because of the typically high operating heights, tower crane operation is not affected by, and is therefore exempt from, power line clearance regulations - CORRECT ANSWERfalse What method is often used to level and secure the tower structure being erected inside a building? - CORRECT ANSWER-hardwood wedges When erecting tower cranes how many should bolts be re used? - CORRECT ANSWER-only once T or F Guylines are never used to secure a freestanding tower while it is being assembled - CORRECT ANSWER-false T or F When assembling the crane, spring clips are used to secure the pendant pins because of their ease and safety - CORRECT ANSWER-false What is used to adjust the jib for proper inclination and eliminate jib twist - CORRECT ANSWER-turnbuckles A tower crane fastened to the outside of a building should be secured a minimum of - CORRECT ANSWER-4 flours What is the purpose of a jib radius marker? - CORRECT ANSWER-indicate position of trolley on the jib T or F A limit switch is a device that restricts movements of the crane and prevents overloading or damage - CORRECT ANSWER-true T or F Each crane only requires only one limit switch. That switch will be on the trolley hoist - CORRECT ANSWER-false T or F All limit switches are of a mechanical type, including those on digital control cranes - CORRECT ANSWER-false Tower crane brakes must apply when there is a power loss. These are called: - CORRECT ANSWER-fail safe brakes T or F Tower and mobile cranes are both load tested at 125% overload - CORRECT ANSWER-false Tower crane operator controls should automatically return to what position when pressure is released? - CORRECT ANSWER-neutral Every tower crane cab MUST be equipped with a: - CORRECT ANSWER-load rating chart T or F Because of their light weight, it is not necessary to include slings and rigging hardware in the pre-lift load weight calculations - CORRECT ANSWER-false T or F A tower crane can be safely operated in wind speeds exceeding 20-30 mph if the load doesn't approach the crane capacity - CORRECT ANSWER-false T or F If so equipped, the digital computerized operator aid system can be used as a scale to test weight of the load - CORRECT ANSWER-false T or F The person giving signals must always be in a position to see the load clearly at all times - CORRECT ANSWER-true The preferred method of contact between signal person and operator is by - CORRECT ANSWER-hard wire voice communicaton If the jibs of two adjacent tower cranes can overlap, which of the following conditions should apply - CORRECT ANSWER-jibs set at different heights, operators have voice contact, one person organizing hoisting operations...all of above T or F The jib of an unattended tower crane is locked in position and never allowed to weathervane with the wind - CORRECT ANSWER-false T or F A tower crane used regularly and in good working condition only requires inspection every 6 months - CORRECT ANSWER-false