Materials and Construction
Failure of a material is termed as fatigue failure, if it fails below the yield point. The resistance to fatigue failure of a material is measured by the

Ultimate tensile strength (U.T.S.)
Endurance limit
None of these
Elastic limit

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Materials and Construction
Duriron is

Prone to breakage due to thermal expansion because of its very high co-efficient of thermal expansion
All of these
Acid resistant, brittle and very hard
High silicon iron

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