Chemical Engineering - Refractory Technology
Exercise :: Refractory Technology - Section 2
| 16. |
Si percentage in silica refractories used in the walls of coke oven is about |
Answer: Option D
Explanation:
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| 17. |
Silica bricks are attacked by basic slags at high temperature. Which of the following is not used solely as a binding material? |
| A. |
aluminium phosphate | | B. |
water | | C. |
lime | | D. |
plaster of paris |
Answer: Option B
Explanation:
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| 18. |
High thermal conductivity of a refractory material is not important, when it is to be used in the |
| A. |
coke oven regenarators | | B. |
muffle furnace | | C. |
blast furnace | | D. |
recuperators |
Answer: Option C
Explanation:
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| 19. |
Maximum safe working temperature for fireclay bricks is about __________ °C. |
Answer: Option D
Explanation:
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| 20. |
Ferromagnetic ceramic material is not used in the |
| A. |
thermal insulation | | B. |
transformers | | C. |
magnetic switches | | D. |
television sets |
Answer: Option A
Explanation:
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