| 1. | If the fineness modulus of sand is 3, then the sand is graded as ? | |
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very fine sand
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fine sand
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medium sand
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coarse sand
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Report Question| 2. | Argillaceous materials contain ............ as their major constituent ? | |
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calcium
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lime
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alumina
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none
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| 3. | For heat and sound insulation purposes, we shall use ? | |
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vacuum concrete
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air-entrained concrete
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saw dust concrete
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both (b) and (c)
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| 4. | The practical utility of concrete technology for civil engineers is to ? | |
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enable them to know how to stock properly the materials required for concrete
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enable them to perform different tests concerning concrete
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make them conversant with the fundamental principles of concrete
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all of the above
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| 5. | The concrete mix is said to be workable if it has ? | |
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compatibility
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movability
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stability
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all of these
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| 6. | In transportation of concrete by pumps ? | |
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the slump should not be less than 50 mm and more than 80 mm
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the water cement ratio should remain between 0.5 to 0.65
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the number of bends in a pipe line should be as small as possible
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all of the above
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| 7. | The presence of lime in cement ? | |
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makes the cement sound
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does not provides strength to the cement
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lowers the clinkering temperature
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all of these
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| 8. | The workability of concrete is expressed by ? | |
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water-cement ratio
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compaction factor
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slump value
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both (a) and (b)
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| 9. | In order to prepare a test specimen, it is necessary to ? | |
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mix the cement and fine aggregate (sand) by dry hand
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mix the coarse aggregate
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mix water to the cement, fine aggregate and coarse aggregates
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all of the above
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| 10. | Which of the following statement is correct ? | |
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Duff Abram's law is valid only when the concrete is of workable plasticity
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If the water-cement ratio is less, the strength of concrete will be less
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The strength of concrete decreases with age
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A rich mix of concrete provides low strength than a lean mix
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