__________ furnace is not an electric furnace. Resistance Arc Pot Induction TRUE ANSWER : ? YOUR ANSWER : ?
Combustion of furnace oil in a furnace (soaking pit) with preheated combustion air at 400°C results in saving of about __________ percent furnace oil as compared to its combustion with atmospheric air, if the flue gas outlet temperature from the soaking pit is 1200°C. 40 60 20 5 TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following advantages is not associated with the use of preheated air for combustion of a fuel in the furnace? Increase in flame temperature Increase in calorific value of the fuel Saving in fuel consumption Reduction in scale losses TRUE ANSWER : ? YOUR ANSWER : ?
Turndown ratio of a burner gives an idea of the __________ in the furnace. Minimum heat input rate only Range of fuel firing rates Maximum heat input rate only Volume of the combustion chamber TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is not a recuperative furnace? Coke oven Reheating furnace Steamboiler Soaking pit TRUE ANSWER : ? YOUR ANSWER : ?
In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the Thermal conductivity of the charge & structural materials of furnace Nature of process ; whether batch, continuous or intermittant All of these Rate of firing and emissivity of flame TRUE ANSWER : ? YOUR ANSWER : ?
Maximum thermal efficiency of boiler may be about __________ percent. 25 10 90 65 TRUE ANSWER : ? YOUR ANSWER : ?
Hearth furnaces are not used for Reheating Melting None of these Roasting TRUE ANSWER : ? YOUR ANSWER : ?
Size of the combustion chamber of a furnace depends upon the Preheat temperature of fuel & air Method of mixing the fuel & air Heat release rate of the fuel All of these TRUE ANSWER : ? YOUR ANSWER : ?