Neutral atmosphere is maintained in a/an ____________ furnace?

Related Mcqs:

The heating capacity of muffle furnace depends on the_________________?

A. Surface area & emissivity of the stock B. Properties of the muffle wall (temperature, area, and emissivity) C. Both A. & B. D. Neither A. nor B....

Thermal efficiency of an open hearth furnace may be about _____________ percent?

A. 5 B. 20 C. 50 D. 80...

In low or standard frequency induction furnace, heat is produced by the_______________________?

A. Combination of induced current and skin effect B. Induction and resistance C. Current flow through a heating element D. None of these...

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....

In practical operation of any furnace, zero oxygen percentage or theoretical CO2 percentage in flue gas is rarely achieved, because of__________________?

A. Use of non-preheated combustion air B. Use of pulverised solid fuels C. Imperfect mixing of fuel & air and infiltration of air D. Use of excessive positive draft in the furnace...