The factor of safety, based on the elastic limit of the material, for the forks used on power operated industrial trucks aboard a MODU must be at least __________.
• Factor of safety and what it means in lifting/handling gear design • Difference between ultimate strength and elastic limit of a material • Why equipment on a MODU (Mobile Offshore Drilling Unit) may require higher safety margins than shore‑side equipment
• Think about how severe the consequences would be if a fork on a power industrial truck failed while lifting a heavy load on a moving offshore unit. • Compare typical safety factors used for common lifting gear (like slings, shackles, and cranes) and consider whether forks on a MODU are likely to be at the low end or high end of that range. • Ask yourself: does offshore use, with motion and dynamic loads, usually justify a higher or lower factor of safety compared to calm, on‑shore warehouse use?
• Verify in 46 CFR sections dealing with materials‑handling equipment on MODUs for specific numeric safety factors. • Check that the factor is based on elastic limit, not ultimate breaking strength. • Confirm whether similar MODU equipment (like crane hooks or other structural members) use a factor of safety closer to the lower or upper values in the answer choices.
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