Which of the following is not a recuperative furnace ?
A. Soaking pit
B. Reheating furnace
C. Steam boiler
D. Coke oven
Furnace Technology
The thermal efficiency of an air/fuel gas preheating recuperator may be as high as _____________ percent?
The thermal efficiency of an air/fuel gas preheating recuperator may be as high as _____________ percent?
A. 50
B. 65
C. 85
D. 99
Flue gas outlet temperature from the chimney of any furnace should be ideally about ______________ °C?
Flue gas outlet temperature from the chimney of any furnace should be ideally about ______________ °C?
A. 50
B. 100
C. 150
D. 250
Forced recirculation of furnace gases is practised_______________?
Forced recirculation of furnace gases is practised_______________?
A. To increase heat transfer by convection
B. To ensure uniform temperature
C. In furnaces, operating below 750°C
D. All A., B. and C.
An improved and fuel efficient version of the pusher type reheating furnace is the ______________ furnace?
An improved and fuel efficient version of the pusher type reheating furnace is the ______________ furnace?
A. Walking beam
B. Shaft
C. Tunnel
D. Rotary hearth
Scaling of furnace stock is reduced by _______________ in flue gas?
Scaling of furnace stock is reduced by _______________ in flue gas?
A. CO
B. H2
C. High CO/CO2
D. All A., B. & C.
Which of the following variables affects the furnace capacity ?
Which of the following variables affects the furnace capacity ?
A. Temperature of flue gas
B. Thermal conductivity of stock
C. Thickness of heating stock
D. All A., B. and C.