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