| 1. | To prevent the cement bags from any possible contact with moisture, the main point that should be kept in mind is that the ? | |
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space between the exterior walls and piles should be 30 cm
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cement bags should be placed closer together in the piles
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width and height of the pile should not exceed 3 m and 2.70 m respectively
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all of the above
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Report Question| 2. | The workability of concrete can be improved by adding ? | |
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hydrated lime
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flyash
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calcium chloride
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all of these
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| 3. | If the effective plan area of a warehouse is 54 m², and the maximum height of pile permitted is I then the number of cement bags to be stored is ? | |
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2000
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2200
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2500
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2700
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| 4. | The water used for ordinary concrete is equal to 5% by weight of aggregate plus ....... by weight of cement ? | |
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10%
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20%
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30%
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40%
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| 5. | The slump test of concrete is used to measure ? | |
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consistency
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mobility
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homogeneity
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all of these
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| 6. | For reinforced cement concrete lintels and slabs, the nominal size of coarse aggregate should not exceed ? | |
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10 mm
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15 mm
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20 mm
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40 mm
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| 7. | The-concrete can be lifted by pumps through a maximum vertical distance of ? | |
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10 m
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20 m
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30 m
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50 m
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| 8. | The internal friction between the ingredients of concrete is minimised by ? | |
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adopting coarse aggregates
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using more water
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reducing the surface area
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all of these
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| 9. | The apparent specific gravity of an aggregate is defined as ? | |
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the weight of oven dry aggregate divided by its absolute volume, excluding the natural pores in the aggregate particles
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the weight of oven dry aggregate divided by its absolute volume, including the natural pores in the aggregate particles
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the weight of aggregate required to fill a container of unit volume
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the difference in weight of the aggregate in saturated surface dry condition and in moist condition
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| 10. | The usual proportion of ingredients in plain cement concrete is ? | |
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Portland cement (1 part), clean sand (1 and 1/2 to 8 parts) and coarse aggregate (3 to 16 parts)
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Portland cement (1 part), clean sand (3 to 16 parts) and coarse aggregate (1 and 1/2 to 8 parts)
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Portland cement (1 part), clean sand and coarse aggregate (1 and 1/2 to 8 parts)
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any one of the above
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