Q. The linear thermal expansion of __________ bricks upto 1000 °C is very low of the order of ≤ 0.5 percent.

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Q. Fusion point of an acidic refractory material is

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Q. Which is required in an insulating refractory ?

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Q. 'Super refractories' are made from pure

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Q. Chromite refractories are

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Q. Cold crushing strength of refractories depends upon its

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Q. Tar bonded dolomite bricks

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Q. Electrical resistor bars are made of

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Q. Which is not an alumino-silicate refractory?

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Q. Periclase refractory contains mainly

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Q. Periclase is

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Q. Which of the following is not a neutral refractory ?

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Q. Which is a basic refractory ?

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Q. Cold crushing strength of a refractory does not depend upon its

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Q. Refractoriness under load (RUL) is the most important property for the refractory bricks

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Q. Si percentage in silica refractories used in the walls of coke oven is about

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Q. Silica bricks are attacked by basic slags at high temperature. Which of the following is not used solely as a binding material?

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Q. High thermal conductivity of a refractory material is not important, when it is to be used in the

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Q. Maximum safe working temperature for fireclay bricks is about __________ °C.

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Q. Ferromagnetic ceramic material is not used in the

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