NCCCO 7 Crane-Load Charts Exam Review Questions and Answers

Crane configuration includes: - Reeving, boom length, counterweight, on outriggers, on rubber, extensions or jibs stowed or mounted, offsets, wire rope type or construction How does the operator determine the manufacturers recommended rope for the crane? - Read the manufacturer load chart or operator manual Capacities above the bold line on the load chart are based on: - Structural strength If replacing the hoist line wire rope on a crane, how do you determine the size or type of wire rope to use? - Use Manufacturer's operator's manual or load chart Net capacity is equal to: - Gross capacity minus capacity deductions The load weight numbers given in a crane load chart indicate the ___________that the crane can safely lift. - Gross load Which of these conditions will not dramatically affect the values illustrated on load charts? - Improper outrigger set up Changing radius Wind d. None of the above* If a jib is erected but not being used, it is treated as a deduction from the cranes: - Gross capacity A truck crane is rated at what percentage of its load capacity? - 85% When determining the "gross load " the best method is: - Get an accurate load weight and add the rigging. Tipping capacities of crawler cranes are based on what percentage of tipping? - 75% How does the operator determine if correct load chart is being used? - Matching Serial number In a range diagram, boom length and angle can be used to determine: - Load radius Only approved attachments or extra counterweights made by the manufacturer should be - They could cause a backward stability problem If not listed in the loadcapacity charts for a hydraulic crane and you are in between boom lengths, you should: - Use the next longer length The jib capacity is 8 tons and the ball weighs 900 lbs. What is the heaviest load that can be lifted safely? - 15,100