Hearth furnaces are not used for (A) Roasting (B) Melting (C) Reheating (D) None of these

Hearth furnaces are not used for
(A) Roasting
(B) Melting
(C) Reheating
(D) None of these
by

1 Answer

Answer :

(D) None of these
by

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Means for giving direction to the circulation of gases in furnaces are (A) Fans (B) Arrangement of heating stock in the furnaces (C) Location of outlet ports and heating & combustion devices (D) All (A), (B) and (C)

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Pulverised fuel fired furnaces employ __________ fuel firing. (A) Horizontal (B) Vertical (C) Tangential (D) All (A), (B) and (C)

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Forced recirculation of furnace gases is practised (A) To increase heat transfer by convection (B) To ensure uniform temperature (C) In furnaces, operating below 750°C (D) All (A), (B) and (C)

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In which of the following furnaces, the gases are sucked through the stock bed from below? (A) Soaking pit (B) Sintering machine (C) Beehive oven (D) None of these

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Naphthalene recovered from coke oven gas is used (A) As moisture proof coating on fibres(B) As moth balls (insecticides)(C) As a fuel in furnaces(D) For making electrodes

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Soft coke is not (A) Produced by low temperature carbonisation of coal (B) A domestic fuel (C) Used in blast furnaces (D) None of these

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Is there any way to slow coke formation in ethylene furnaces?

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