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26. Bituminous concrete is a mix comprising of ___. |
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A. fine aggregate and bitumen |
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B. coarse aggregate, fine aggregate, filler and bitumen |
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C. coarse aggregate, filler and bitumen |
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D. fine aggregate, filler and bitumen |
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Answer: B coarse aggregate, fine aggregate, filler and bitumen |
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27. If aggregate size of 50-40 mm is to be tested for finding out the portion of elongated aggregates using length gauge, the slot length of the gauge should be ___ mm. |
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A. 45 |
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B. 54 |
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C. 81 |
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D. 90 |
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Answer: C 81 |
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Explanation: Slot length for elongated aggregate = 1.8 x mean dimension = 1.8((50 + 40)/2) = 81 For flakiness index, the slot size mm = 0.6((50 + 40)/2) = 27 mm |
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28. The consistency and flow resistance of bitumen can be determined from ____. |
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A. Ductility test |
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B. Viscosity test |
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C. Softening point test |
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D. Penetration test |
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Answer: B Viscosity test |
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29. Match List-I (Test) with List-II (Property) and select the correct answers using the codes given below the lists:
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A. A-2, B-1, C-4, D-3 |
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B. A-4, B-1, C-2, D-3 |
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C. A-3, B-2, C-1, D-4 |
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D. A-4, B-2, C-3, D-1 |
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Answer: B A-4, B-1, C-2, D-3 |
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30. Bituminous materials are commonly use in highway construction because of their good ____. |
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A. shear strength and tensile properties |
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B. tensile and compression properties |
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C. binding and water proofing properties |
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D. bond and tensile properties |
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Answer: C binding and water proofing properties |