Construction Materials

191) The main ingredient the manufacture of glass is

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silica

192) The constituent metals of German silver are

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zinc-copper-nickel

193) The melting point of glass is in the range of

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iron

194) The base metal in alloys is

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aluminium

195) Pig iron made from haemitite ore, free from sulphur, phosphorus and copper, is known as

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Bessemer pig

196) which one represents the pig iron obtained from the furnace with insufficient fuel at low temperature?

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white or forge pig

197) which type of pig iron is used for manufacture of wrought iron?

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white pig

198) which one represents the pig iron obtained from the furnace that is properly provided with fuel at very high temperature?

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grey or foundry pig

199) The type of pig iron used for the manufacture of steel by Bessemer process is

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Bessemer pig

200) which is the most unsuitable pig iron for manufacture of light and ornamental castings?

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Mottled pig

Subject Notes

Objective Box

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