40 TOP Concrete Technology Online Test – Multiple Choice Questions and Answers 1. ISI has specified full strength of concrete after 14 days 21 days 28 days none of these 2. Addition of pozzolana to cement causes reduction in bleeding increase in curing time loss of heat of hydration All 3. Hardening of cement occurs at slow rate during the first few days and afterwards it continues to increase at a rapid rate uniform rate throughout its age rapid rate during the first few days and afterwards it continues to increase at a decreased rate none of these 4. Water required per bag of cement, is 7kg 14kg 21kg 35kg 5. You are asked to construct a massive dam, the type of cement you will use, is blast furnace slag cement low heat cement ordinary Portland cement rapid hardening cement 6. Addition of pozzolana to ordinary port land cement, causes reduction in chemical action with sulphates increase in shrinkage reduction bleeding All 7. Batching error means inaccuracy in the quantity of cement aggregates water All 8. Ordinary concrete is not used for concrete grade M 150 M 200 M 250 M 400 9. Construction joints are generally provided in concrete retaining walls lining of tunnels lining of canals All 10. The produce impermeable concrete proper compaction of concrete is required proper curing of concrete is required properly graded and non-porous aggregates are requied All Loading … Question 1 of 10
