Concrete Technology and Design

321. Workability of concrete is directly proportional to

1. Aggregate cement ratio
2. Time of transit
3. Grading of the aggregate
4. All of above

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322. Workability of concrete is inversely proportional to

1. Time of transit
2. water-cement ratio
3. The air in the mix
4. Size of aggregate

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323. Workability of concrete is measured by

1. Vicat apparatus test
2. Slump test
3. Minimum void method
4. Talbot Richard test

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

1. Tensile strength test
2. Slump test
3. Compaction factor test
4. Flexural strength test

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325. Wp and Wf are the weights of a cylinder containing partially compacted and fully compacted concrete. If the compaction factor (Wp/Wf) is 0.95, the workability of concrete is

1. Extremely low
2. Very low
3. Low
4. High

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326. You are asked to construct a massive dam, the type of cement you will use, is

1. Ordinary Portland cement
2. Rapid hardening cement
3. Low heat cement
4. Blast furnace slag cement

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