Oxygen percentage in the flue gas coming out of a gaseous fuel fired furnace should be ideally about _____________ percent?

Related Mcqs:

Scaling of furnace stock is reduced by _______________ in flue gas?

A. CO B. H2 C. High CO/CO2 D. All A., B. & C....

The electric furnace in which heat is produced by a combination of induced current and skin effect is called _____________ furnace?

A. Arc B. Resistance C. Low frequency induction D. High frequency induction...

Advantages of use of preheated combustion air are__________________?

A. Saving in fuel consumption B. Reduction in scale losses C. Increase in flame temperature D. All A., B. and C....

Means for giving direction to the circulation of gases in furnaces are_____________________?

A. Fans B. Arrangement of heating stock in the furnaces C. Location of outlet ports and heating & combustion devices D. All A., B. and C....

Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of_________________?

A. Graphite powder B. Thoria C. Zircon powder D. Beryllium...