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Question 69

Short term overheating is a permanent deformation occurring at relatively _________ stress levels as a result of localized overheating. This usually results in bulging and failure by stress rupture.

    Correct Answer: A

    Short term overheating is a condition where permanent deformation happens due to localized overheating at relatively low stress levels. This can result in bulging and eventual failure by stress rupture. The stress level does not need to be high because the high temperature reduces the material's strength, leading to deformation at lower stress.

Discussion
ahmadmmOption: A

Short-term Overheating - Permanent deformation occurring at very high temperatures and typically relatively low stress levels as a result of localized overheating. It typically will result in bulging and eventual failure by stress rupture. If the temperature is high enough, failure will occur very quickly by tensile overload, since tensile strengths drop off dramatically at very high temperatures. At less severe temperatures, short-term creep failure will occur.