Mechanical Engineering - Engineering Materials
Exercise :: Engineering Materials - Section 6
| 11. |
The catalysts are used to accelerate the chemical reaction during the process of ploymerisation of plastics. |
Answer: Option A
Explanation:
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| 12. |
Muntz metal (Yellow brass) contains |
| A. |
70% copper and 30% zinc | | B. |
60% copper and 40% zinc | | C. |
59% copper, 40% zinc and 1% tin | | D. |
60.45% copper, 35.2% zinc and 5.35% nickel |
Answer: Option B
Explanation:
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| 13. |
Which of the following gives the correct order of increasing hot hardness of cutting tool materials? |
| A. |
Diamond, Carbide, High speed steel | | B. |
Carbide, Diamond, High speed steel | | C. |
High speed steel, Carbide, Diamond | | D. |
High speed steel, Diamond, Carbide |
Answer: Option C
Explanation:
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| 14. |
The slag from the blast furnace |
| A. |
is used as a ballast for rail road | | B. |
is mixed with tar for road making | | C. |
consists of calcium, aluminium and ferrous silicates | | D. |
all of the above |
Answer: Option D
Explanation:
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| 15. |
Which of the following is a mesomorphous material? |
Answer: Option A
Explanation:
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