43) A rod of dia 6mm and length 100mm is forged to convert to a ring of mean circumference 225mm. Diameter of the forged ring is
Answer is:
4 mm
ISRO Technician-B Blacksmithy Question Paper - 2019 (Set-1) with Answer Key
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Answer is:
723 degree C
Explanation:
The lower critical temperature is same for all steels
Lower critical temperature for steel’s austenite-to-pearlite transformation is 1333 ºF (723 ºCelsius). Below this temperature, austentite doesn’t exist.