Q. The most useless aggregate is one whose surface texture is

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Q. To obtain a very high strength concrete, use very fine grained

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Q. For the construction of R.C.C. slabs, columns, beams, walls, etc. the grade of concrete mix used, is

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Q. The type of aggregates of same nominal size, which contain less voids when compacted, are

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Q. For the construction of cement con-certe dams, the maximum permissible size of the aggregates, is

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Q. Permissible compressive strength of M 200 concrete grade is

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Q. For preparing a test-specimen, it is necessary

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Q. Concrete containing

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Q. An ordinary Portland cement when tested for its fineness, should not leave any residue on I.S. seive No. 9, more than

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Q. The top diameter, bottom diameter and the height of a slump mould are :

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Q. Workability of concrete mix with low water cement ratio is determined by

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Q. While designing an air entrained concrete

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Q. Ordinary Portland cement is manufactured from

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Q. A flaky aggregate is said to be elongated if its length is

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Q. To prevent segregation, the maximum height for placing concrete, is

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Q. If the various concrete ingredients i.e. cement, sand and aggregates are in the ratio of 1:3:6, the grade of concrete, is

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Q. Water cement ratio is generally expressed in volume of water required per

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Q. Pick up the incorrect statement from the following:

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Q. In slump test, each layer of concrete is compacted by a steel rod 60 cm long and of 16 mm diameter for

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Q. If the average compressive strength is 4000 kg/cm² and standard deviation is 500, the co-efficient of variation is

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