Chemical Engineering MCQs

A. Pulverised coal
B. Furnace oil
C. Blast furnace gas/mixed gas
D. Coke oven gas

A. Solid fuels
B. Hydrocarbon containing fuel gases (e.g. coke oven gas, refinery gas etc.)
C. Both a. and b.
D. Neither a. nor b.

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. Emissivity of the refractory walls
B. Size of the furnace
C. Use of waste heat recovery equipments
D. Thickness of the stock

A. More of excess air
B. Less of excess air
C. More of co in flue gas
D. More of co2 in flue gas

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

A. Air is sucked in, so air leaks are more and hence the furnace efficiency is reduced
B. The fan operates hot and hence blades are liable to corrosion and erosion
C. Positive pressure exists in the furnace
D. None of these

A. Soaking pit
B. Open hearth furnace
C. Coke ovens
D. None of these

A. 10-15
B. 25-30
C. 45-50
D. 65-70

A. Increasing the draft in the furnace
B. Preheating the fuel gas
C. Oxygen enrichment of combustion air
D. Preheating the combustion air