Furnace Technology

Which furnace employs preheating, heating and soaking zones ? A. Soaking pitB. Reheating furnace C. Open hearth furnace D. Cupola

Regenerators are normally provided in the____________________? A. Glass melting furnace B. Open hearth furnace C. By product coke ovensD. All A., B. and C.

Overfire burning in a furnace is a phenomenon characterised by____________________? A. Supply of excess fuel B. Supply of excess airC. Burning carbon monoxide and other incombustible in upper zone of furnace by supplying more air D. None of these

Which is a continuous furnace ? A. Coke ovens B. Annealing furnaceC. Glass tank furnace D. None of these

Turndown ratio of a burner gives an idea of the ______________ in the furnace? A. Range of fuel firing rates B. Volume of the combustion chamber C. Maximum heat input rate only D. Minimum heat input rate only

A refractory wall separating the stock and the source of heat is provided in a__________________? A. Updraft kilnB. Muffle furnace C. Continuous furnace D. None of these

Large tonnage of refractory bricks are dried in a_____________________? A. Shaft furnace B. Rotary hearth furnaceC. Tunnel kiln D. Muffle furnace

If the flame is produced under the hearth and then sweeps up into the heating chamber, this is called a/an ______________ furnace? A. SidefiredB. Underfired C. Covered D. Recirculating

Which one shows the diagrammatic heat balance in a furnace ? A. Sankey diagram B. Cox chart C. Ostwald chart D. None of these

In reverberatory furnace, charge is heated mainly by__________________? A. Conduction B. Natural convectionC. Radiation of heat from the roof of the combustion chamber D. None of these