Refractory Technology MCQ Questions & Answers

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Each section contains 100 MCQs on Refractory Technology .

Most Cermets, which normally have high thermal conductivity and high thermal shock resistance, comprises of ceramic & metallic components of __________ percent respectively.

A) 80 and 20 B) 20 and 80 C) 50 and 50 D) 60 and 40

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Presence of MgO in alumino-silicate refractories __________ its refractoriness.

A) Increases B) Lowers C) Does not affect D) Either A or B; depends on its quantity

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

Fusion point of a basic refractory material is

A) Reduced by the addition of acid oxides B) Increased by the addition of acid oxides C) Not affected by the addition of acid oxides D) Always less than 1000°C

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Which is not a natural insulating material?

A) Diatomaceous earth/kieselgur B) Asbestos C) Vermiculite D) None of these

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

Zirconia refractories are not used in

A) Making sheaths for thermocouple B) Lining high temperature ceramic kilns C) Furnaces subjected to fluctuating temperature D) High frequency induction furnaces in the form of inductors

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

Silica refractories are not used in

A) Coke oven walls B) Beehive coke ovens C) Dome and upper portion of B.F. stoves D) Open hearth furnace roof

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

High alumina refractories are used in the

A) Dome of blast furnace stoves B) Electric arc furnace roof C) Glass melting furnaces D) All of the above

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

Test piece for determination of RUL of a refractory is heated in a/an

A) Oxidising atmosphere B) Reducing atmosphere C) Electric furnace D) Neutral atmosphere

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

Lower wall courses of soaking pits are made of __________ bricks to avoid the action of molten slag & scale.

A) Chrome or magnesite B) Silicon carbide C) Silica D) Lowduty fireclay

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Spalling resistance of a refractory can not be increased by

A) Increasing its porosity B) Using a coarser grog during its manufacture C) Decreasing its thermal co-efficient of expansion D) Making it denser

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

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Refractory Technology MCQ Questions & Answers | Chemical Engineering