The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent. 99 85 50 65 TRUE ANSWER : ? YOUR ANSWER : ?
Design of waste heat boiler for recovery of waste heat from furnace gases depends upon the Corrosive nature of the waste gas All of these Quantity & temperature of waste gas Dust concentration & nature of dust in waste gas TRUE ANSWER : ? YOUR ANSWER : ?
Example of an indirectly heated furnace is Neither A nor B Both A and B Muffle furnace Hood annealing furnace TRUE ANSWER : ? YOUR ANSWER : ?
In which of the following furnaces, the gases are sucked through the stock bed from below? Sintering machine Beehive oven None of these Soaking pit TRUE ANSWER : ? YOUR ANSWER : ?
Pot furnace which is either regenerative or recupterative, is used in the manufacture of Stainless steel Refractory bricks Glass Potteries TRUE ANSWER : ? YOUR ANSWER : ?
Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above __________ °C. 850 250 1000 650 TRUE ANSWER : ? YOUR ANSWER : ?
Ostwald charts are meant for Calculation of flue gas temperature Computation of flue gas analysis Computing the excess/deficiency of combustion air None of these TRUE ANSWER : ? YOUR ANSWER : ?
Fuel economy in an industrial furnace operation can not be achieved by the use of Stoichiometric combustion air Non-preheated combustion air Recupterators Combustion air not enriched with oxygen TRUE ANSWER : ? YOUR ANSWER : ?
Presence of SO₂ in furnace gases attacks the ferrous metal by way of Attacking the grain boundaries; particularly severe on low carbon and nickel bearing steels at high temperature Causing metal embrittlement Accelerating the rate of scaling All of these TRUE ANSWER : ? YOUR ANSWER : ?
Oxygen enrichment of combustion air does not result in increase of the Flame temperature Oxygen in the flue gas Stack loss Heat transfer rate in the furnace TRUE ANSWER : ? YOUR ANSWER : ?