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Refractory Technology

Refractory Technology
Which of the following is not an acidic refractory?

Silica bricks
Magnesia bricks
Bauxite bricks
Fireclay bricks

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Refractory Technology
Refractory bricks with lower permeability is produced by using

All of these
Higher firing temperature
Higher moulding pressure
Finer grog size

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Refractory Technology
Slide gates in teeming laddie used for steel pouring in ingot moulds is lined with __________ bricks.

Silica
Semi-silica
Fireclay
Bakelite impregnated or fused periclase

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Refractory Technology
Refractories used in/for __________ should have low thermal conductivity.

Muffle furnaces
Insulation
Coke ovens
Regenerators

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Refractory Technology
Magnesite chrome bricks are used in the

All of these
Soaking pits
Reheating furnaces
Roof lining of basic open hearth & other basic furnaces

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Refractory Technology
Permeability of bricks is a measure of the

Melting point
Refractoriness
Expansion during heating
Rate at which a fluid will pass through the pores

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