Which of the following is a directly fired intermittant furnace? Tower furnace Walking beam reheating furnace Reverberatory furnace Tunnel kiln 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 Furnace oil with air Blast furnace gas with oxygen Blast furnace gas with air Furnace oil with oxygen TRUE ANSWER : ? YOUR ANSWER : ?
Heat transfer rate to the charge/stock in a furnace does not depend upon the Type of fuels viz solid, liquid or gaseous Initial temperature of the charged stock Emissivity of refractory walls Flue gas temperature TRUE ANSWER : ? YOUR ANSWER : ?
The heating capacity of continuous reheating furnace depends upon the All of these Hearth area and furnace temperature Emissivity of the stock Ratio of wall surface to stock surface TRUE ANSWER : ? YOUR ANSWER : ?
Ostwald charts are meant for Computation of flue gas analysis Computing the excess/deficiency of combustion air None of these Calculation of flue gas temperature TRUE ANSWER : ? YOUR ANSWER : ?
Thermal efficiency of a limestone calcination rotary kiln may be around __________ percent. 65 20 40 80 TRUE ANSWER : ? YOUR ANSWER : ?
Which is not accomplished in an underfired furnace? Increase in heating capacity/m² of floor space Reduction in the temperature of furnace gases Elimination of cold spot at the bottom of the charge Portection of the periphery of the charge from excessive radiation TRUE ANSWER : ? YOUR ANSWER : ?
The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent. 85 70 15 40 TRUE ANSWER : ? YOUR ANSWER : ?
Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above __________ °C. 650 850 1000 250 TRUE ANSWER : ? YOUR ANSWER : ?
To reduce the stack loss, heat recovery from flue gas can be done by Steam generation in waste heat boilers Preheating of cold stock All of these Preheating of combustion air TRUE ANSWER : ? YOUR ANSWER : ?