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81. For the penetration test of bituminous material the sample is maintained at standard temperature of ____. |
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A. 22°C |
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B. 27°C |
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C. 20°C |
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D. 25°C |
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Answer: D 25°C |
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82. The standard rate of pull in ductility test of bitumen is ____. |
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A. 30 mm/minute |
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B. 50 mm/minute |
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C. 40 mm/minute |
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D. 25 mm/minute |
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Answer: B 50 mm/minute |
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83. The flakiness index of aggregate is the percentage by weight of the aggregate particle whose least dimension/thickness is less than ____. |
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A. 0.6 times their mean dimension |
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B. 0.8 times their mean dimension |
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C. 1.2 of their mean dimension |
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D. 1.8 times their mean dimension |
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Answer: A 0.6 times their mean dimension |
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84. As per IRC, in wearing course of pavement, the aggregate impact value should not exceed _____. |
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A. 40 % |
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B. 50 % |
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C. 35 % |
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D. 30 % |
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Answer: D 30 % |
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85. The specified number of blows of hammer for aggregate impact test are ____. |
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A. 10 |
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B. 25 |
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C. 20 |
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D. 15 |
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Answer: D 15 |