When the dimension is expressed as`20_(- 0.025)^ (+ 0.035)`, then the tolerance is
Answer : Option D
Answer : Option C
operation of a bessemer converter, the white flame indicates that the
silicon and managenese had burnt and carbon has started oxidising.
Answer : Option A
The limestone in the charge of a blast furnace decomposes to give lime and carbon dioxide. The lime thus obtained
Vanadium when added to steel