In order to maintain a reducing atmosphere in a furnace, it should have High excess air No O₂ in flue gas CO in flue gas None of these TRUE ANSWER : ? YOUR ANSWER : ?
Size of the combustion chamber of a furnace depends upon the Preheat temperature of fuel & air All of these Method of mixing the fuel & air Heat release rate of the fuel TRUE ANSWER : ? YOUR ANSWER : ?
The heating capacity of continuous reheating furnace depends upon the Hearth area and furnace temperature Ratio of wall surface to stock surface All of these Emissivity of the stock TRUE ANSWER : ? YOUR ANSWER : ?
Oxygen enrichment of combustion air does not result in increase of the Stack loss Flame temperature Oxygen in the flue gas Heat transfer rate in the furnace TRUE ANSWER : ? YOUR ANSWER : ?
Regenerators compared to the recuperators for the same duty Are less costly Occupy more space Are of smaller size All of these TRUE ANSWER : ? YOUR ANSWER : ?
Waste heat from the outgoing flue gases in a thermal power plant is recovered by a/an All of these Steam superheater Air preheater Economiser TRUE ANSWER : ? YOUR ANSWER : ?
In reverberatory furnace, charge is heated mainly by Radiation of heat from the roof of the combustion chamber Natural convection None of these Conduction TRUE ANSWER : ? YOUR ANSWER : ?
Reverberatory furnace is used for Steel melting Roasting/reduction of ores Heating air Annealing steel coil TRUE ANSWER : ? YOUR ANSWER : ?
The electric furnace in which heat is produced by a combination of induced current and skin effect is called __________ furnace. Resistance Low frequency induction Arc High frequency induction TRUE ANSWER : ? YOUR ANSWER : ?
Rotary kilns are used in the Cement manufacture Neither A nor B Both A and B Calcination of limestone & dolomite TRUE ANSWER : ? YOUR ANSWER : ?