Chemical Engineering - Refractory Technology
Exercise :: Refractory Technology - Section 3
| 1. |
__________ is not a single oxiderefractory. |
| A. |
Zirconia | | B. |
Silicon carbide | | C. |
Magnesia | | D. |
None of these |
Answer: Option B
Explanation:
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| 2. |
Hot blast main (carrying air at 1000°C) in blast furnace are lined with __________ bricks. |
| A. |
silica | | B. |
fireclay | | C. |
magnesite | | D. |
zirconia |
Answer: Option B
Explanation:
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| 3. |
High alumina refractory compared to fireclay bricks have |
| A. |
less load bearing capacity. | | B. |
less resistance to slag attack. | | C. |
low refractoriness. | | D. |
high resistance to thermal shock and creep. |
Answer: Option D
Explanation:
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| 4. |
Refractory bricks with lower permeability is produced by using |
| A. |
higher firing temperature. | | B. |
higher moulding pressure. | | C. |
finer grog size. | | D. |
all (a), (b) and (c). |
Answer: Option D
Explanation:
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| 5. |
Refractory bricks having lower porosity have |
| A. |
high insulating properties | | B. |
low heat capacity | | C. |
low thermal conductivity | | D. |
greater strength |
Answer: Option D
Explanation:
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