1.

What percentage of powered ferrosilicon is mixed with sodium silicate bonded sand in Nishiyama process?(a) 1%(b) 2%(c) 3%(d) 4%

Answer» Correct answer is (b) 2%

For explanation: In Nishiyama process, 2% of finely powered ferrosilicon is made to mix with sodium silicon bonded sand to ensure that hardening occurs.


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