Size of the combustion chamber of a furnace depends upon the Method of mixing the fuel & air Heat release rate of the fuel Preheat temperature of fuel & air All of these TRUE ANSWER : ? YOUR ANSWER : ?
Amount of coal lost in ash particle, which is carried through the boiler system, depends upon the Physical nature, ash content and fineness of the coal All of these Amount of excess air supplied and load on the boiler Type of burner and combustion chamber TRUE ANSWER : ? YOUR ANSWER : ?
Waste heat from the outgoing flue gases in a thermal power plant is recovered by a/an Air preheater Economiser Steam superheater All of these TRUE ANSWER : ? YOUR ANSWER : ?
The purpose of controlling the furnace atmosphere is to prevent surface attack by Oxidation/scaling Either of the above Sulphur penetration Decarburising TRUE ANSWER : ? YOUR ANSWER : ?
In order to maintain a reducing atmosphere in a furnace, it should have No O₂ in flue gas High excess air None of these CO in flue gas TRUE ANSWER : ? YOUR ANSWER : ?
In which of the following furnaces, the gases are sucked through the stock bed from below? Beehive oven None of these Soaking pit Sintering machine TRUE ANSWER : ? YOUR ANSWER : ?
Combustion of fuel in a furnace with oxygen enriched air results in higher Flame temperature Flue gas volume Stack loss Fuel consumption TRUE ANSWER : ? YOUR ANSWER : ?
Rate of heat release in a furnace, which is the measure of heat intensity is defined as Kcal/hr/m³ combustion space Kcal/hr Kcal/m³ combustion space None of these TRUE ANSWER : ? YOUR ANSWER : ?
Maximum thermal efficiency of boiler may be about __________ percent. 10 65 90 25 TRUE ANSWER : ? YOUR ANSWER : ?
The reason for excessive clinker formation in gas producers is the Development of hot spots in the fuel bed and an abnormally high rate of gasification Use of coal/coke containing a high % of fines and ash All of these Use of fuel having too low an ash fusion temperature TRUE ANSWER : ? YOUR ANSWER : ?