Shaft furnaces are used for_______________________?
Shaft furnaces are used for_______________________?
A. Smelting
B. Calcining
C. Roasting
D. All A., B. and C.
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Protective gas used in the annealing furnace for steel coil comprises of__________________?
Protective gas used in the annealing furnace for steel coil comprises of__________________?A. 95% N2 + 5% H2
B. 5% H2 + 9% N2
C. 100% CO
D. 100% H2Higher furnace temperature cannot be achieved by use of a lean fuel gas in the furnace by_________________?
Higher furnace temperature cannot be achieved by use of a lean fuel gas in the furnace by_________________?A. Increasing the draft in the furnace
B. Preheating the fuel gas
C. Oxygen enrichment of combustion air
D. Preheating the combustion airAn electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace.
Question: An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace.
[A].resistance [B].
arc [C].
low frequency induction [D].
none of these Answer: Option B
Explanation:
No answer description available for this question.
The thermal efficiency of an air/fuel gas preheating recuperator may be as high as _____________ percent?
The thermal efficiency of an air/fuel gas preheating recuperator may be as high as _____________ percent?A. 50
B. 65
C. 85
D. 99Large tonnage of refractory bricks are dried in a
Question: Large tonnage of refractory bricks are dried in a
[A].shaft furnace [B].
rotary hearth furnace [C].
tunnel kiln [D].
muffle furnace Answer: Option C
Explanation:
No answer description available for this question.
Heat transfer takes place through a liquid medium surrounding the submerged material under heating, in case of a/an__________________?
Heat transfer takes place through a liquid medium surrounding the submerged material under heating, in case of a/an__________________?A. Blast furnace
B. Steam boiler
C. Salt bath furnace
D. Annealing furnace