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 ?

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....

Regenerators compared to the recuperators for the same duty__________________?

A. Occupy more space B. Are less costly C. Are of smaller size D. All A., B. and C....

Coke ovens in steel plant are heated by____________________?

A. Electricity B. Blast furnace gas/mixed gas C. Coke oven gas D. Both B. and C....

An example of a periodic furnace is the__________________?

A. Blast furnace stoves B. Blast furnace C. Coke oven heating chamber D. Rotary kilns...

______________ is an indirectly heated furnace?

A. Open hearth furnace B. Muffle furnace C. Soaking pit D. Reheating furnace...