Q. Which is not accomplished in an underfired furnace ?

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Q. The advantages of firing pulverised coal in the furnace lies in the fact that, it

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Q. Combustion of furnace oil in a furnace (soaking pit) with preheated combustion air at 400°C results in saving of about __________ percent furnace oil as compared to its combustion with atmospheric air, if the flue gas outlet temperature from the soaking pit is 1200°C.

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Q. Which furnace employs an I.D. fan for the removal of flue gases from the furnace ?

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Q. The function of an economiser in a boiler is to preheat the

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Q. Fuel economy in an industrial furnace operation can not be achieved by the use of

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Q. If the flame is produced under the hearth and then sweeps up into the heating chamber, this is called a/an __________ furnace.

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Q. Furnace aerodynamics is related to the __________ in the furnace.

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Q. Circulation of gases in furnace is caused by the

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Q. Regenerators as compared to recuperators for the same duty

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Q. Artificial draught produced by a fan in the furnace can be controlled by the

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Q. Main gas valve in a gaseous fuel burner is a __________ valve.

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Q. The rate of scaling of furnace stock depends upon the

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Q. Reheating furnace (pusher type) is used for heating

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Q. Size of the combustion chamber of a furnace depends upon the

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Q. Which of the following is not a recuperative furnace ?

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Q. Presence of SO₂ in furnace gases attacks the ferrous metal by way of

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Q. Reducing atmosphere is maintained in a

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Q. Combustion of fuel in a furnace with oxygen enriched air results in higher

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Q. In order to maintain an oxidising atmosphere in a furnace, it should have

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