Chemical Engineering - Refractory Technology
Exercise :: Refractory Technology - Section 4
| 1. |
An ideal refractory should have high |
| A. |
spalling rate | | B. |
fusion point | | C. |
shrinkage ability | | D. |
none of these |
Answer: Option B
Explanation:
|
| 2. |
Ganister is a source of the |
| A. |
silica | | B. |
periclase | | C. |
lime | | D. |
none of these |
Answer: Option A
Explanation:
|
| 3. |
Which brick undergoes maximum shrinkage on drying ? |
| A. |
Tar bonded dolomite bricks | | B. |
Fireclay bricks | | C. |
Magnesite bricks | | D. |
Chromite bricks |
Answer: Option B
Explanation:
|
| 4. |
Which is the stable form of silica upto 1470°C ? |
| A. |
Quartz | | B. |
Cristobalite | | C. |
Tridymite | | D. |
None of these |
Answer: Option C
Explanation:
|
| 5. |
Hot face insulating linings of high purity alumina fused mullite are used, where |
| A. |
very high temperatures are involved. | | B. |
highly reducing conditions are involved. | | C. |
presence of iron or silica is harmful. | | D. |
all (a), (b) and (c). |
Answer: Option D
Explanation:
|
