Chemical Engineering - Refractory Technology

1. 

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

A. fireclay
B. silica
C. magnesite
D. corundum

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

2. 

Fusion point of an acidic refractory material is

A. increased by the addition of basic oxides.
B. reduced by the addition of basic oxides.
C. not affected by the addition of basic oxides.
D. always more than 2500°C.

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

3. 

Which is required in an insulating refractory ?

A. High thermal conductivity
B. Low porosity
C. Both (a) and (b)
D. Neither (a) nor (b)

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

4. 

'Super refractories' are made from pure

A. carbides
B. oxides
C. borides
D. nitrides

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

5. 

Chromite refractories are

A. acidic refractory.
B. neutral refractory.
C. basic refractory.
D. fired at a temperature of 600°C only.

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

1 2 3 4 5 6 7 8 9 10 Next »