Q. If P, Y and Z are the weights of cement, fine aggregates and coarse aggregates respetively and W/C is the water cement ratio, the minimum quantity of water to be added to first batch, is obtained by the equation

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Q. For the construction of thin R.C.C. structures, the type of cement to be avoided, is

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Q. Vicat apparatus is used for

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Q. Concrete gains strength due to

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Q. If aggregates completely pass through a sieve of size 75 mm and are retained on a sieve of size 60 mm, the particular aggregate will be flaky if its minimum dimension is less than

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Q. Non-uniform compaction may cause the concrete

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Q. Log Angles machine is used to test the aggregate for

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Q. If fineness modulus of sand is 2.5, it is graded as

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Q. The dimensions of a 35 litre forma for measuring aggregates by volume, are :

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Q. The shuttering of a hall measuring 4 m x 5 m, can be removed after

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Q. Pick up the correct statement from the following:

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Q. If 50 kg of fine aggregates and 100 kg of coarse agregates are mixed in a concrete whose water cement ratio is 0.6, the weight of water required for harsh mix, is

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Q. The entrained air in concrete

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Q. Pozzolanic properties exist in

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Q. An aggregate which passes through 25 mm I.S. sieve and is retained on 20 mm sieve, is said to be flaky if its least dimension is less than

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Q. Expansion joints are provided if the length of concrete structures exceeds

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Q. Workability improved by adding

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Q. If the slump of a concrete mix is 60 mm, its workability is

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Q. An excess of flaky particles in concrete aggregates

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Q. 1.S.I. has specified the full strength of concrete after

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