FURNACE TECHNOLOGY QUIZ

An example of shaft furnace is the

Glass melting tank

L.D. converter

Blast furnace

Soaking pit

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The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent.

15

40

85

70

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The rate of scaling of furnace stock depends upon the

Nature of atmosphere

Temperature

Time

All of these

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__________ is an indirectly heated furnace.

Reheating furnace

Open hearth furnace

Soaking pit

Muffle furnace

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Reheating furnace (pusher type) is used for heating

Slabs

Ingots

Steel coils

Steel sheets

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Fuel economy in furnaces can be achieved by

All of these

Preheating the combustion air

Using oxygen enriched combustion air

Reducing the heat loss through furnace openings & doors

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If fuel and air are mixed ahead of the burner, it is called a/an __________ burner.

Rotary

Diffusion

Premix

Outside mixing type

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Which of the following is not an additive for flue gases from furnace to reduce its dew-point?

Alkaline powders

Fine dolomite

None of these

Ammonia

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Acid dew point temperature (ADT) of a flue gas produced by the combustion of a fuel containing 1% sulphur may be about __________ °C.

180

250

130

80

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Recuperator is

An intermittant waste heat recovery equipment

Heavier than regenerator meant for the same duty

A continuous waste heat recovery equipment

Not used for fuel gas preheating

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