| 11. |
Which of the following is not a raw material used for the manufacture of ordinary glass?
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Answer:
Option (a) |
| 12. |
How can you tell the difference between soda-lime glass and quartz?
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Answer:
Option (a) |
| 13. |
The two types of soda-lime glass- flat glass and container glass differ in:
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Answer:
Option (d) |
| 14. |
Which type of glass is used in the manufacturing of artificial gems, bulbs, lenses, etc.?
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Answer:
Option (c) |
| 15. |
What are lead glasses used for?
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Answer:
Option (b) |
| 16. |
What is the crown type of glasses?
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Answer:
Option (b) |
| 17. |
What is the Kovar type of glass?
|
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|
Answer:
Option (c) |
| 18. |
What changes are observed when a glass is heated?
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Answer:
Option (a) |
| 19. |
Glasses show evidence of _____ fractures.
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Answer:
Option (b) |
| 20. |
Chromatic glass is used in
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Answer:
Option (a) |