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What is the total permissible elongation for a gage length of 5.08cm?(a) 5080 cm(b) 0.00508 cm(c) 0.508 cm(d) 0.000508 cmThe question was posed to me in an interview for internship.My enquiry is from Physical Terms and Test Terms topic in chapter Physical Test & Heat Treatment Terms of Aerospace Materials & Processes

Answer»

The CORRECT OPTION is (d) 0.000508 cm

Easiest explanation: The PROOF stress is the load a material can endure without permanent distortion of more than 0.0001cm per 1cm. So, if the gage length is 5.08cm, the total permissible ELONGATION would be – 5.08×0.0001 = 0.000508cm.



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