Mobile Cranes No. 1 Study Guide | 100% Correct Answers | Verified | Latest 2024 Version

The load radius as shown on the capacity chart is the distance from the center of rotation to the centerline of the vertical host line with: - The rated load suspended. If the jib angle to ground is changed from 50 degrees to 40 degrees, this would affect the capacity of the crane how? - Capacity will decrease. Load capacity charts are based on 75% of tipping for crawler cranes without out riggers. For wheel mounted cranes, using outriggers fully extended, capacities are based on what percentage of tipping? - 85% The operators should exercise extreme caution when lifting loads from the water mainly because: - The load on the crane will increase as an object leaves the water. On the upper works - On the carrier. When working on soft soil with poor bearing support: - Use matting to distribute crane's weight over a larger area. The best way to determine the weight of a load to be lifted is to: - Have a certified load weight and add in the weight of all rigging. When a situation arises that will not permit outriggers to be set at positions that correspond to the locations established by the manufacturer's load rating charts, the crane manufacturer shall be consulted to determine if any capacity reductions, special operation procedures, or limitations are required. If required information is not available from the manufacturer, whom shall be consulted? - Qualified person. When performing a pick and carry operation using a crawler crane, the load should be positioned: - Over the front.A thick dark line running across the load chart means that the load listings: - Above the lines are limited by structural factors. Dynamic motion such as swinging with a load can cause what change in the crane operation? - Increased load radius. The dead end of the wire rope above the wedge socket must extend a minimum of 6 times the rope diameter or: - 6 inches. A work area chart is used to: - Identify capacity changes due to operational quadrants. Which of the following 3 sling hitches is listed in order from the strongest to the weakest? - Basket, Vertical, Chocker. An anti-2-block damage of prevention system will: - Prevent any crane movements that will cause a 2-block condition. The minimum distance for safety between the swing radius of the counter weight and any obstacle is: - 2 Feet. What is the best source of information