Crane Safety and Rigging questions and answers graded A+ 2023/2024

Crane Safety and RiggingWhat is the most common reason for crane-related fatal accidents? - correct answer Powerlines and then being struck by the crane load How do you escape an energized crane? - correct answer The whole body needs to stay in one spot. Do not separate your feet. So, hop on one foot or shuffle with your feet touching each other until far enough away from the crane OSHA specified that for construction work around powerlines rated _______ or below, the minimum clearance between the lines and any part of the crane or load must be ______ ft. - correct answer 50 kV 10 ft What is the total voltage of power lines with ceramic insulators? - correct answer 1 insulator = 15 kV of protection 10 insulators > 150 kV but < 165 kV Determine if any part of the equipment, load line or load (including rigging and lifting accessories), if operated up to the equipment's maximum working radius in the work zone, could get closer than ___ feet to a power line (up to 350 kV). - correct answer 20 ft If it can get closer than 20 ft to a power line, what do we have to do next? - correct answer Must meet the following requirements: 1. Deenergize and ground. Confirm from the utility owner/operator that the power line has been deenergized and visibly grounded at the work site. 2. 20-ft clearance 3. Table A clearance How to calculate the min. clear distance? - correct answer if we have 200 kV 200 - 50 = 150 10 ft + .4"(150) = 10' + 60" = 15 ft (which is the min. clearance distance given in the table) 10 is from the min. distance for 50 kV and under and the .4 is constant Who can give hand signals? - correct answer A person qualified and experienced to give crane signals to the operator How many people should be giving signals? - correct answer One person should be giving signals and the operator should only be taking orders from one signalman What is the only exception to the "one signalman" rule? - correct answer A crane operator must obey Emergency STOP signals no matter who gives it at a site What should you do as a signalman? - correct answer 1. Be in clear view of the crane operator, have a clear view of the load and the equipment, keep persons outside the crane operating area 2. Hold your hands away from your body so that the operator can clearly see them 3. Always give signals according to the OPERATOR's right or left 4. As the designated signal person, your only duty is signaling the crane by focusing on the tasks. Rigging and other duties will be performed by others. 5. Use a middle‐man to transfer hand signals when you can't see the operator, or a radio 6. Always watch the load, the crane operator is watching you. 7. Make sure the load does not pass above workers 8. Keep the crane at least 20 feet away from power lines, keep an eye out overhead power lines The signalperson must constantly talk to the operator at all times during loading operations. ___________ of radio silence means _______. This is to protect the employee from battery failure or loss of radio transmission - correct answer 3 seconds