Mobile Crane Questions Test 3 Questions and Answers | Latest Version | 2024/2025 | Graded A+

Mobile Crane Questions Test 3 Questions and Answers | Latest Version | 2024/2025 | Graded A+ A crane loses stability when its leverage on the load is: Less than the load's leverage on the crane. A crane that climbs a 7% grade, one mile hill, should descend down the hill in: Either fourth or fifth gear. A crane's jib is offset 15o versus its original 0o offset, but the boom angle remains unchanged. In this situation, the load radius: Increases. A lattice boom truck crane with 120 ft. boom will be operating at 42 ft. radius. The load chart shows an entry indicating 25,000 lbs., at a 40 ft. radius, followed immediately by an entry listing 20,000 lbs., at 45 ft. radius. What is the crane's capacity at the 42 ft. radius? 20,000 lbs. A lattice boom truck crane, when setup out of level, will lose the most capacity with? Long boom; short radius. A pin-connected lattice boom is being dismantled. After connecting the equalizer (bridle) to the connecting lugs on the boom, which boom connecting pins should be removed first? Lower connection pins, located at and ahead of the equalizer. A telescopic crane is equipped with an anti-two-block lock-out device. When the device is activated which functions should be disabled? Hoist up, extend out, and lower the boom. A truck crane operating with outriggers fully extended and set, does not have a fifth front outrigger, the operator should: Refer to the manufacturer's working area diagram. Abruptly stopping a rapid swing on a long boom mobile crane will produce what major effect? Overturning the crane or collapsing the boom. Blocking can be placed under the ends of tracks to: Increase the crane's stability when operating over the front or back. Blocking which is not tightly placed may fail at: 50% of design. During assembly, where should you attach slings to lift boom sections? End fittings. Each outrigger pad and its blocking should be sufficient to support: The total weight of the crane and its load. How does high wind affect the setup of a crane with a long boom? Introduces side load onto the boom. How many broken wires are permitted at the end connection of a pendant before it must be taken out of service? 1. If a lattice boom truck crane is going to perform work over the front it must have: A front- mounted outrigger. If high winds are expected and the lattice boom crane must be secured pointing into the wind, then the hook should be: Secured to a solid structure directly below the boom point. If the jib is offset, the crane's capacity will: Be reduced. In setting up the crane, the operator can extend three outriggers fully and one only halfway out, but all verticle cylinders are down, and floats are on good supports. The operator must: Use the "on rubber" load chart. Jib capacities are based on : Structural strength. Manufacturer specifications permit only a certain