Civil Engineering - Building Materials
Exercise :: Building Materials - Section 4
| 36. |
The cast iron when heated to red heat with powdered red haemetite in an oven for increasing its toughness, is converted to |
| A. |
grey cast iron | | B. |
white cast iron | | C. |
mottled cast iron | | D. |
toughed cast iron. |
Answer: Option C
Explanation:
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| 37. |
Jhumb bricks are |
| A. |
under burnt | | B. |
over burnt | | C. |
kutcha | | D. |
none of these. |
Answer: Option B
Explanation:
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| 38. |
Plastic bitumen is generally used for |
| A. |
road pavements | | B. |
expansion joints | | C. |
crack fillings | | D. |
none to these. |
Answer: Option C
Explanation:
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| 39. |
Pick up the correct statement from the following: |
| A. |
The heating of a material to redness in contact with air, is known as calcination | | B. |
The property of lime by which it sets or hardens in damp places having no free circulation of air is called setting | | C. |
The product that remains after calcination of limestone, is called lime | | D. |
All the above. |
Answer: Option D
Explanation:
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| 40. |
The commonly used thinner in oil paints, is |
| A. |
naptha | | B. |
turpentine | | C. |
both (a) and (b) | | D. |
neither (a) nor (b) | | E. |
none the these. |
Answer: Option C
Explanation:
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