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Multiple Choice Questions
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mechanical engineering engineering materials
1. Blast furnace is used to produce
(A): cast iron
(B): pig iron
(C): steel
(D): wrought iron
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MCQ->Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is __________ percent.....
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MCQ->Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent.....
MCQ->In the blast furnace, incorporation of water vapour in the blast gives the following effect.....
MCQ->Hot blast main (carrying air at 1000°C) in blast furnace are lined with __________ bricks.....
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