Which of the following is not a continuous waste heat recovery equipment from the flue gases going out of furnace? Regenerator Economiser Waste heat boiler Ceramic recuperator TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following accentuates clinker-ing troubles on furnace grate burning coal? Low forced draft & fuel bed temperature Low reactivity of carbonised residue containing high proportion of iron & sulphur Thick firebed and preheated primary air All of these TRUE ANSWER : ? YOUR ANSWER : ?
Presence of SO₂ in furnace gases attacks the ferrous metal by way of Accelerating the rate of scaling All of these Attacking the grain boundaries; particularly severe on low carbon and nickel bearing steels at high temperature Causing metal embrittlement TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is a directly fired intermittant furnace? Tower furnace Reverberatory furnace Walking beam reheating furnace Tunnel kiln TRUE ANSWER : ? YOUR ANSWER : ?
Which is a continuous furnace? Coke ovens Glass tank furnace Annealing furnace None of these TRUE ANSWER : ? YOUR ANSWER : ?
Power required in case of forced draught as compared to induced draught (for the same draught produced) is More Less Either more or less; depends on the flue gas density Answer: Option B Same TRUE ANSWER : ? YOUR ANSWER : ?
The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent. 85 99 65 50 TRUE ANSWER : ? YOUR ANSWER : ?
Maximum heat transfer in high temperature furnaces is by Radiation Conduction Convection Either A, B or C; depends on the type of furnace TRUE ANSWER : ? YOUR ANSWER : ?
Which is a regenerative furnace? Both A and B Neither A nor B Coke oven heating chamber Open hearth furnace TRUE ANSWER : ? YOUR ANSWER : ?
Out of the following fuels used in a furnace exhausting flue gas at a temperature of 600°C, the percentage stack loss will be maximum in case of complete combustion of Blast furnace gas with oxygen Furnace oil with air Blast furnace gas with air Furnace oil with oxygen TRUE ANSWER : ? YOUR ANSWER : ?