Furnace Technology

A. Higher calorific value
B. Better combustion
C. Smokeless burning
D. Less erosion on furnace wall

A. Economiser
B. Steam superheater
C. Air preheater
D. All A., B. and C.

A. Economiser
B. Regenerator
C. Ceramic recuperator
D. Waste heat boiler

A. Increase in calorific value of the fuel
B. Increase in flame temperature
C. Reduction in scale losses
D. Saving in fuel consumption

A. Blast furnace stoves
B. Blast furnace
C. Coke oven heating chamber
D. Rotary kilns

A. Size of the furnace
B. Gas velocity in furnace
C. Ratio of wall surface to surface of stock
D. None of these

A. Change in volume during a change of temperature
B. Difference in density between hot and cold gases
C. Furnace pressure in conjunction with draft in flues
D. All A., B. and C.

A. Increase in heating capacity/m2 of floor space
B. Elimination of cold spot at the bottom of the charge
C. Reduction in the temperature of furnace gases
D. Protection of the periphery of the charge from excessive radiation

A. Oxidation/scaling
B. Decarburising
C. Sulphur penetration
D. Either of the above

A. Store smaller quantity of waste heat
B. Are lighter & compact
C. Involve higher initial cost
D. All A., B. & C.