Category: Furnace Technology

A. Addition of methane to the furnace atmosphere reduces decarburising by hydrogen
B. Nitrogen in presence of steam decor-burises high carbon steel, whereas hydrocarbon gases
carburise the surface of steel at annealing temperatures
C. Active nitrogen (formed by cracking ammonia at the metal surface) cause nitride formation
with increase in surface hardness
D. None of these

A. 80
B. 130
C. 180
D. 250

A. 2000
B. 3000
C. 4500
D. 6000

A. Soaking pit
B. Muffle furnace
C. Reheating furnace
D. None of these

A. Air pressure
B. Fuel gas pressure
C. Speed of I.D. fan
D. Damper

A. Transportation of coal
B. Drying of coal
C. Combustion of coal by supplying it around the burner
D. Preheating the primary air

A. Coke oven heating chamber
B. Open hearth furnace
C. Both A. and B.
D. Neither A. nor B.

A. Horizontal
B. Vertical
C. Tangential
D. All A., B. and C.

A. Movement of gases
B. Measurement of flue gas volume
C. Temperature control
D. Pressure adjustment

A. Is the removal of carbon from iron carbide (Fe3C)
B. Affects its crystalline structure
C. Is favoured by CO2
D. All A., B. and C.