FURNACE TECHNOLOGY QUIZ

Which is a continuous furnace?

None of these

Glass tank furnace

Coke ovens

Annealing furnace

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In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the

All of these

Nature of process ; whether batch, continuous or intermittant

Rate of firing and emissivity of flame

Thermal conductivity of the charge & structural materials of furnace

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Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by

Preheating the combustion air

Preheating the fuel gas

All of these

Oxygen enrichment of combustion air

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In a furnace operation, which is not preheated?

Both A and B

Neither A nor B

Solid fuels

Hydrocarbon containing fuel gases (e.g. coke oven gas, refinery gas etc.)

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Higher furnace temperature can not be achieved by use of a lean fuel gas in the furnace by

Increasing the draft in the furnace

Preheating the fuel gas

Preheating the combustion air

Oxygen enrichment of combustion air

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Reheating furnace (pusher type) is used for heating

Ingots

Steel coils

Slabs

Steel sheets

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Ingress of cold air in the furnaces through cracks, charging doors, openings etc.

Increases the load on the induced draft fan

Reduces the furnace draught

Reduces the flue gas temperature and makes the furnace atmosphere oxidising

All of these

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Air filtration in a furnace

Increases the flue gas temperature

Reduces its thermal efficiency

None of these

Is indicated by flame sting out

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hich is the most thermally efficient furnace?

Reheating furnace

Rotary kilns

Boiler furnace

Reverberatory furnace

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Dampers are located

Before the I.D fan

Near the top of the chimney

After the I.D. fan

Anywhere after the I.D. fan

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