45) A hole is to be made on mild steel with a 12 mm diameter reamer. If the under size is 0.3 mm and if the oversize is 0.05mm, what will be the diameter of the drill for drilling the hole before reaming?
Answer is:
11.65
Related ISRO Technician-B Fitter Question Paper - 2017 (Set - 1) with Answer Key
Answer is:
Acetylene
Explanation:
In oxy acetylene welding Acetylene gas is closed first to avoid back fire.
Answer is:
723 degree celsius
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.