A. Air pressure
B. Fuel gas pressure
C. Speed of I.D. fan
D. Damper
Related Mcqs:
- In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the__________________?
A. Rate of firing and emissivity of flame
B. Thermal conductivity of the charge & structural materials of furnace
C. Nature of process; whether batch, continuous or intermittent
D. All A., B. and C. - Combustion of furnace oil in a furnace (soaking pit) with preheated combustion air at 400°C results in saving of about __________ percent furnace oil as compared to its combustion with atmospheric air, if the flue gas outlet temperature from the soaking pit is 1200°C ?
A. 5
B. 60
C. 20
D. 40 - An example of shaft furnace is the__________________?
A. L.D. converter
B. Glass melting tank
C. Blast furnace
D. Soaking pit - The resistance furnace produces heat by the__________________?
A. Electric arc struck between electrodes and the charge
B. Flow of current through a heating element
C. Combination of induced current and skin effect
D. None of these - An example of a periodic furnace is the__________________?
A. Blast furnace stoves
B. Blast furnace
C. Coke oven heating chamber
D. Rotary kilns - An example of recuperative furnace is the__________________?
A. Soaking pit
B. Open hearth furnace
C. Coke ovens
D. None of these - Artificial draught produced by a fan in the furnace can be controlled by the___________________?
A. Speed of the fan
B. Damper
C. Variation in the pitch of fan blades
D. All A., B. and C. - Furnace aerodynamics is related to the _____________ in the furnace?
A. Movement of gases
B. Measurement of flue gas volume
C. Temperature control
D. Pressure adjustment - Which furnace employs an I.D. fan for the removal of flue gases from the furnace ?
A. Coke oven
B. Blast furnace stoves
C. Beehive coke oven
D. High pressure boiler - Higher furnace temperature cannot be achieved by use of a lean fuel gas in the furnace by_________________?
A. Increasing the draft in the furnace
B. Preheating the fuel gas
C. Oxygen enrichment of combustion air
D. Preheating the combustion air
