Refractory Technology MCQ Questions & Answers

1

Dolomite bricks have good resistance to attack by

A) Molten steel B) Iron oxide C) Lime slag D) None of these

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Answer & Solution

Answer: Option A

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2

Mullite is chemically represented by

A) Al₂O₃.2SiO₂ B) 3Al₂O₃.2SiO₂ C) Al₂O₃.SiO₂ D) 2Al₂O₃.3SiO₂

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Answer & Solution

Answer: Option B

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3

Chrome magnesite is not used in the

A) Inner lining of L.D. converter B) Aluminium melting furnaces C) Wear out lining of steel melting furnaces D) All of the above

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Answer & Solution

Answer: Option C

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4

Magnesite bricks are used in those parts of furnaces, which are

A) Subjected to temperature fluctuation B) Required to resist corrosive basic slag C) Subjected to high load D) None of these

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Answer & Solution

Answer: Option B

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5

Silicon carbide refractories are used in the

A) Muffle furnace B) Zinc smelting furnace C) Ceramic recuperators D) All of the above

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Answer & Solution

Answer: Option D

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6

Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to

A) Thermal spalling B) Slag attack C) Fusion under load D) CO attack

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Answer & Solution

Answer: Option A

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7

To resist spalling tendency, a refractory should have

A) Greater diffusivity B) Low specific heat C) Low thermal co-efficient of expansion D) All of the above

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Answer & Solution

Answer: Option D

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8

Refractory materials are never used in the construction of

A) Segar cones B) Orton cones C) Pressure vessels D) Ovens & retorts

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Answer & Solution

Answer: Option C

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9

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

A) At the hearth bottom of the furnace on which stock is placed B) Used for furnace insulation C) Used in the roof of the furnace D) None of these

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Answer & Solution

Answer: Option A

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10

Carbon refractories are exclusively used in the

A) Hearth of blast furnace B) Walls of coke oven C) Regenerators of coke oven D) Side wall of soaking pits

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Answer & Solution

Answer: Option A

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Refractory Technology MCQ Questions & Answers | Chemical Engineering