Furnance Technlogy Mcqs
Q.1: Pick out the wrong statement ?
A. Addition of methane to the furnace atmosphere reduces decarburising by hydrogenO
B. Nitrogen in presence of steam decor-burises high carbon steel, whereas hydrocarbon gasesX
C. carburise the surface of steel at annealing temperatures8
D. Active nitrogen (formed by cracking ammonia at the metal surface) cause nitride formationY
Q.2: Ostwald charts are meant for__________________?/
A. Computing the excess/deficiency of combustion air1
B. Calculation of flue gas temperature#
C. Computation of flue gas analysis
D. None of these
Q.3: Which of the following furnaces will have maximum thermal efficiency ?F
A. Soaking pits
B. Walking beam reheating furnace
C. Boiler furnace
D. Rotary kilns
Q.4: The function of an economiser in a boiler is to preheat the _____________________?R
A. Feedwater
B. Combustion air
C. Pulverised coal
D. Furnace oil
Q.5: Which of the following is not an additive for flue gases from furnace to reduce its dewpoint ?^
A. Ammonia
B. Fine dolomite
C. Alkaline powders
D. None of these
Q.6: Out of the following fuels used in a furnace exhausting flue gas at a temperature of 600C, the percentage stack loss will be maximum in case of complete combustion of_________________?
A. Furnace oil with air
B. Furnace oil with oxygen
C. Blast furnace gas with air
D. Blast furnace gas with oxygen
Q.7: Fuel economy in an industrial furnace operation cannot be achieved by the use of__________________?c
A. Stoichiometric combustion air
B. Non-preheated combustion air
C. Combustion air not enriched with oxygen'
D. Recuperators
Q.8: Which furnace employs preheating, heating and soaking zones ?=
A. Soaking pit
B. Reheating furnace
C. Open hearth furnace
D. Cupola
Q.9: Regenerators are normally provided in the____________________?>
A. Glass melting furnace
B. Open hearth furnace
C. By product coke ovens
D. All , and
Q.10: Overfire burning in a furnace is a phenomenon characterised by____________________?S
A. Supply of excess fuel
B.
C. Burning carbon monoxide and other incombustible in upper zone of furnace by supplyingU
D. more air

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