Refractory Technology MCQ Questions & Answers

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Each section contains 100 MCQs on Refractory Technology .

Porosity of fireclay refractories is __________ percent.

A) 5-10 B) 10-25 C) 25-35 D) 35-50

Discuss

Answer & Solution

Answer: Option B

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

Cold crushing strength of a refractory does not depend upon its

A) Shape B) Composition C) Firing temperature D) Texture

Discuss

Answer & Solution

Answer: Option A

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

Vacuum steel degassing units are lined with

A) Silica bricks B) Low duty firebricks C) High alumina bricks D) Graphite blocks

Discuss

Answer & Solution

Answer: Option C

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

Capacity of a refractory brick to withstand-sudden changes in temperature is denoted by the property called

A) Spalling resistance B) Refractoriness C) Refractoriness under load (RUL) D) None of these

Discuss

Answer & Solution

Answer: Option A

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

Which property is important for bricks used in the combustion chamber & dome of blast furnace stoves?

A) High refractoriness B) High resistance to spalling C) High strength and density D) All of the above

Discuss

Answer & Solution

Answer: Option A

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

Thermal conductivity of refractory bricks

A) Increases with decrease in porosity B) Decreases with decreases in porosity C) Is independent of its porosity and is maximum for insulating bricks D) Increases with the amount of air entrapped in pores

Discuss

Answer & Solution

Answer: Option A

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

Thermal spalling mainly occurs during __________ of furnaces.

A) Cooling down B) Warming up C) Both A & B D) Neither A nor B

Discuss

Answer & Solution

Answer: Option C

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

Refractoriness under loads (RUL) is quite close to the fusion temperature (PCE) for __________ bricks.

A) Fireclay B) Silica C) Dolomite D) Very low alumina

Discuss

Answer & Solution

Answer: Option B

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

Which is the stable form of silica below 870°C ?

A) Tridymite B) Cristobalite C) Quartz D) None of these

Discuss

Answer & Solution

Answer: Option C

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

100

Which is the stable form of silica upto 1470°C ?

A) Quartz B) Cristobalite C) Tridymite D) None of these

Discuss

Answer & Solution

Answer: Option C

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

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Refractory Technology MCQ Questions & Answers | Chemical Engineering