1.

For lime concreting in roof terracing the concrete shall be kept wet for _____________(a) 6 hours(b) 24 hours(c) 28 days(d) Fortnight

Answer» Right answer is (d) Fortnight

The explanation: The wetting should be done by covering with straw or sand and watering frequently by water-can or driving into squares by mud diaries which shall be kept flooded with water.


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