Q. Rapid evaporation may cause plastic shrinkage __________

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Q. It is difficult to retain moisture for hydration for rapid evaporation of water during curing period.

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Q. Prepacked concrete _________ water proofing concrete.

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Q. Cement has ________ % volumetric shrinkage after curing.

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Q. After vacuum mixing, the volumetric shrinkage can be raised from 3–5% to __________ % in different cements.

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Q. Vacuum mixing systems reduce the exposure by _________ %.

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Q. The exposure of conventional mixing in open bowl is about ___________ ppm in the breathing zone.

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Q. The __________ compressive strength required from structural consideration.

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Q. The adequate workability necessary for ___________ compaction with the compacting equipment available.

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Q. ___________ water-cement ratio content to give adequate durability for the particular site conditions.

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Q. _______ cement content to avoid shrinkage cracking due to temperature cycle in mass concrete.

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Q. ________ has designated the concrete mixes into a number of grades as M10, M15.

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Q. Maximum nominal size of aggregates to be used in concrete may be as large as possible within the limits prescribed by _______

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Q. Identify the type of destructive testing.

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Q. Which test can be performed without skilled labor?

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Q. Compressive strength of hardened concrete is done by _______

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Q. In the soundness test a specimen of hardened cement paste is _______ for a fixed time.

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Q. On cooling below 1250ºC, C₃S decomposes ______

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Q. The loss in weight should not exceed ______ percent when tested with sodium sulphate and ______ percent with magnesium sulphate solution.

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Q. In a dry environment, concrete strength will be loosed as much as __________ % in moist environment.

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