- (A) Retards the heat transfer
- (B) Assists in temperature equalisation in the charge
- (C) Permits the use of controlled atmosphere for the protection of stock
- (D) All
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- (A) Roasting
- (B) Melting
- (C) Reheating
- (D) None of these
- (A) Is the removal of carbon from iron carbide (Fe3C)
- (B) Affects its crystalline structure
- (C) Is favoured by CO2
- (D) All
- (A) Conduction
- (B) Convection
- (C) Radiation
- (D) Either
- (A) Quantity & temperature of waste gas
- (B) Dust concentration & nature of dust in waste gas
- (C) Corrosive nature of the waste gas
- (D) All
- (A) Bronze is an alloy of copper & tin
- (B) Brass is an alloy of copper & zinc
- (C) The alloy named ‘German silver’ does not contain any silver
- (D) The ability of a material to fracture without appreciable deformation is called its ductility
- (A) Smelting
- (B) Calcining
- (C) Roasting
- (D) All
- (A) Ingots
- (B) Slabs
- (C) Steel coils
- (D) Steel sheets
- (A) 80
- (B) 130
- (C) 180
- (D) 250
- (A) 95% N2 + 5% H2
- (B) 5% H2 + 9% N2
- (C) 100% CO
- (D) 100% H2
