In reverberatory furnace, charge is heated mainly by None of these Conduction Radiation of heat from the roof of the combustion chamber Natural convection TRUE ANSWER : ? YOUR ANSWER : ?
Thermal efficiency of an open hearth furnace may be about __________ percent. 80 5 50 20 TRUE ANSWER : ? YOUR ANSWER : ?
Which furnace employs natural draft? Coke oven L.D. converter Boiler Rotary kilns TRUE ANSWER : ? YOUR ANSWER : ?
In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of Transportation of coal Preheating the primary air Combustion of coal by supplying it around the burner Drying of coal TRUE ANSWER : ? YOUR ANSWER : ?
In a furnace employing forced draught as compared to induced draught, Positive pressure exists in the furnace The fan operates hot and hence blades are liable to corrosion and erosion None of these Air is sucked in, so air leaks are more and hence the furnace efficiency is reduced TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is a periodic furnace? Tunnel kiln Rotary kiln Soaking pit Reheating furnace TRUE ANSWER : ? YOUR ANSWER : ?
In a furnace operation, which is not preheated? Hydrocarbon containing fuel gases (e.g. coke oven gas, refinery gas etc.) Solid fuels Both A and B Neither A nor B TRUE ANSWER : ? YOUR ANSWER : ?
In low or standard frequency induction furnace, heat is produced by the None of these Combination of induced current and skin effect Current flow through a heating element Induction and resistance TRUE ANSWER : ? YOUR ANSWER : ?
Acid dew point temperature (ADT) of a flue gas produced by the combustion of a fuel containing 1% sulphur may be about __________ °C. 130 180 80 250 TRUE ANSWER : ? YOUR ANSWER : ?