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NCCCO Telescopic Boom Crane- Lattice Boom Crawler Crane Summer Exam Review Questions and Answers 100% Pass On a lattice boom crawler crane, the main boom length is measured from the . - Answer>>Center of the boom heel pins to the center of the boom tip sheave.What is the main purpose of mid point suspension pendants? - Answer>>To absorb the shock that comes with dynamic loading.
The main purpose of a gantry or a mast on a crane is: -
Answer>>To increase the crane's leverage on the boom.What effect does having the crawlers retracted have on a crawler crane with long boom? - Answer>>Increase the probability of tipping.When using a mobile crane on a barge, the crane's load capacity chart shall be - Answer>>Replaced by a list chart Blocking can be placed under the ends of tracks to - Answer>>Increase the crane's stability when operating over the front or back.A crawler crane is based on ________ stability of static load. - Answer>>75% 1 / 2
What quadrant produces the least amount of ground pressure on a lattice crawler - Answer>>Side When a crawler crane is on a barge, the list chart must be provided by the - Answer>>Manufacturer When operating a crawler crane, the ground pressure will always be highest over the - Answer>>Corner Unless working in loose soft soil, a crawler crane should always travel ____ on pick and carry operations. - Answer>>Towards the load.Why use mats of cribbing? - Answer>>To reduce ground pressure.Mats are usually _____ to hold together. - Answer>>Bolted A crawler crane traveling forward is defined as traveling in the direction of - Answer>>The idler When disassembling or assembling booms on lattice boom cranes, it is extremely important to - Answer>>Never touch any pin on any boom section located between the pendant attachment points and the crane.A crane with a 100 foot boom will be operating at a 41-ft. radius.The load chart shows an entry indicating 25,000 lbs. at a 40-ft radius. What is the crane's capacity at the 41 ft. radius. - Answer>>21000 lbs.A crane requires fourth gear to climb a one-mile hill with a 7% grade. Which of the following is correct about driving the crane
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