Category: Furnace Technology

A. Physical nature, ash content and fineness of the coal
B. Amount of excess air supplied and load on the boiler
C. Type of burner and combustion chamber
D. All A., B. and C.

A. 50
B. 65
C. 85
D. 99

A. Ingots
B. Slabs
C. Steel coils
D. Steel sheets

A. Air supplied and furnace temperature
B. Burner design (thoroughness of mixing versus stratification)
C. Air preheat and the flow of gases in the furnace (mixing by induction, by acceleration or by
change of direction)
D. All A., B. and C.

A. CO
B. H2
C. High CO/CO2
D. All A., B. & C.

A. Protect the charge from the effects of the products of combustion
B. Smooth out temperature inequalities on the combustion side of the muffle wall
C. Both A. & B.
D. Neither A. nor B.

A. L.D. converter
B. Glass melting tank
C. Blast furnace
D. Soaking pit

A. Shaft furnace
B. Rotary hearth furnace
C. Tunnel kiln
D. Muffle furnace

A. Permits the use of high ash content coal
B. Permits the use of low fusion point ash coal
C. Accelerates the burning rate and economises on fuel consumption
D. All A., B. and C.

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