Engineering :: Building Materials
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41. |
The attrition test on stones is performed |
A. |
to determine the crushing strength of the stone |
B. |
for assessing the resistance of stone to the sun, rain, wind etc. |
C. |
for ascertain the stability of the stone when exposed to acid fumes |
D. |
for determining the rate of wear of stone due to grinding action under traffic |
Answer: Option D
Explanation:
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42. |
The stone used for the construction of curved or ornamental work should be soft. |
Answer: Option A
Explanation:
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43. |
A first class brick should not absorb water more than |
Answer: Option C
Explanation:
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44. |
The brick earth is derived by the disintegration of |
A. |
igneous |
B. |
metamorphic |
Answer: Option A
Explanation:
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45. |
The principal constituent of every kind of brick earth is alumina. |
Answer: Option A
Explanation:
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46. |
A first class brick should have a minimum crushing strength of |
A. |
7 MN/m2 |
B. |
10.5 MN/m2 |
C. |
12.5 MN/m2 |
D. |
14 MN/m2 |
Answer: Option B
Explanation:
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47. |
The percentage of alumina in a good brick clay should vary from |
A. |
20 to 30% |
B. |
30 to 40% |
C. |
40 to 50% |
D. |
50 to 60% |
Answer: Option A
Explanation:
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48. |
The percentage of silica in a good brick clay should vary from |
A. |
20 to 30% |
B. |
30 to 40% |
C. |
40 to 50% |
D. |
50 to 60% |
Answer: Option D
Explanation:
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49. |
Excess pf alumina in the clay |
A. |
makes the brick brittle and weak |
B. |
makes the brick crack and warp on drying |
C. |
changes colour of the brick from red to yellow |
D. |
improves impermeability and durability of the brick |
Answer: Option B
Explanation:
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50. |
Excess of silica in the clay |
A. |
makes the brick brittle and weak |
B. |
makes the brick crack and wrap on drying |
C. |
changes the colour of the brick from red to yellow |
D. |
improves impermeability and durability of the brick |
Answer: Option A
Explanation:
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