| 1. | When the sand is fully saturated, its volume is ........ the volume of dry and loose sand ? | |
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equal to
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less than
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more than
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none of these
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Report Question| 2. | The deleterious materials present in the aggregate ? | |
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prevent normal hydration of cement
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reduce the strength and durability of concrete
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modify the setting action and cause efflorescence
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all of the above
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| 3. | The minimum particle size of fine aggregate is ? | |
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0.0075 mm
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0.075 mm
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0.75 mm
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0.95 mm
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| 4. | If the aggregate completely passes through a 50 mm sieve and retained on 40 mm sieve, then the particular aggregate is said to be flaky if its least dimension is less than ? | |
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27 mm
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37 mm
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47 mm
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57 mm
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| 5. | For the manufacture of concrete of low density, the aggregate used ? | |
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furnace clinker
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coke breeze
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saw dust
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all of these
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| 6. | The length of Vicat plunger in Vicat's apparatus varies from ? | |
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20 to 30 mm
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30 to 40 mm
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40 to 50 mm
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50 to 60 mm
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| 7. | The setting time of cement is the governing factor for ? | |
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mixing of concrete
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placing of concrete
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compaction of concrete
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all of these
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| 8. | Insufficient quantity of water ? | |
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makes the concrete mix soft
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makes the concrete mix unworkable
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causes segregation in concrete
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causes bleeding in concrete
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| 9. | The aggregates of .......... shape have maximum voids ? | |
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irregular
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angular
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rounded
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flaky
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| 10. | Excess quantity of water ? | |
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makes the concrete mix harsh
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makes the concrete mix unworkable
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causes segregation in concrete
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both a and b
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