Fuels and Combustion

A. 4
B. 96
C. 20
D. 40

A. Sewage gas
B. Refinery gas
C. Producer gas
D. Bagasse

A. Contributes to its heating value
B. Affects the quality of steel produced as cracks develop on the surface while rolling the steel
C. Both A. and B.
D. Neither A. nor B.

A. Iron sulphate
B. Iron silicate
C. Lime and magnesia
D. All A., B. and C.

A. 900
B. 4200
C. 7500
D. 2000

A. 8
B. 12
C. 22
D. 36

A. Has higher calorific value
B. Is harder and stronger
C. Is not subjected to washing
D. Has low quantity of mineral matter

A. Coal tar
B. Bitumen
C. Molasses
D. None of these

A. 12 hours
B. 2-3 days
C. One week
D. Two weeks

A. Calorific value of the fuel
B. Flame temperature achieved
C. Speed of combustion of fuel
D. Heat transfer rate to the stock in the furnace