Answer:
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1. The stress which vary from a minimum value to a maximum value of the same nature (i.e. tensile or compressive) is called [tex]\rm\underline{fluctuating\:stress.}[/tex]
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2. The endurance or fatigue limit is defined as the maximum value of the stress which a polished standard specimen can withstand without failure, for infinite number of cycles, when subjected to [tex]\rm\underline{completely\:reversed\:load.}[/tex]
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3. Failure of a material is called fatigue when it fails [tex]\rm\underline{below\:the\:yield\:point.}[/tex]
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Explanation:
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