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Refractory Technology

Refractory Technology
Colour of fireclay bricks is

Black
None of these
Yellow
Light buff to reddish buff

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Refractory Technology
Which is a basic refractory?

Fireclay
None of these
Silica
Chrome magnesite

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Refractory Technology
Refractory castables are used for

Producing monolithic linings
Patch work
All of these
Minimising the number of joints in the structure

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Refractory Technology
With decrease in porosity, the __________ of the refractories decreases.

Strength
None of these
Spalling resistance
Thermal conductivity

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Refractory Technology
Silica bricks are never used for lining the

By-product coke ovens
Dome of blast furnace stoves
Beehive coke ovens
Roof of open hearth furnace

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Refractory Technology
Porosity is induced in insulating refractories by adding

Calcium phosphate
Ammonium chloride/sulphate
All of these
Powdered naphthalene

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