A. 80
B. 130
C. 180
D. 250
A. 95% N2 + 5% H2
B. 5% H2 + 9% N2
C. 100% CO
D. 100% H2
A. Speed of the fan
B. Damper
C. Variation in the pitch of fan blades
D. All A., B. and C.
A. Regenerator
B. Metallic recuperator
C. Ceramic recuperator
D. None of these
Which of the following is the most suitable for preheating combustion air above 650°C ? Read More »
Furnace Technology A. Arc
B. Resistance
C. Low frequency induction
D. High frequency induction
A. 5
B. 20
C. 50
D. 80
Thermal efficiency of an open hearth furnace may be about _____________ percent? Read More »
Furnace Technology A. By-product coke oven
B. Calcination kiln
C. Sintering furnace
D. Open hearth furnace
Which of the following is not a directly fired furnace ? Read More »
Furnace Technology A. Reduces its thermal efficiency
B. Is indicated by flame sting out
C. Increases the flue gas temperature
D. None of these
Air filtration in a furnace___________________? Read More »
Furnace Technology A. 250
B. 650
C. 850
D. 1000
A. By-product coke ovens
B. Beehive coke oven
C. Blast furnace stoves
D. Soaking pits
Regenerators are used for waste heat recovery in____________________? Read More »
Furnace Technology