| 1. | The usual proportion of ingredients in reinforced cement concrete is ? | |
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Portland cement (1 part), clean sand (2 to 4 parts) and coarse aggregate (1 to 2 parts)
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Portland cement (1 part), clean sand (1 to 2 parts) and coarse aggregate (2 to 4 parts)
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Portland cement (1 part), clean sand and coarse aggregate (2 to 4 parts)
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any one of the above
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Report Question| 2. | Bulk 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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| 3. | The factor which effects the design of concrete mix is ? | |
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fineness modulus
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water-cement ratio
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slump
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all of these
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| 4. | The process of proper and accurate measurement of all concrete materials for uniformity of proportions and aggregate grading is called ? | |
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proportioning
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grading
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mixing
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batching
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| 5. | The construction joints in cement concrete ? | |
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should be located where bending moment is large
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should be located where shear force is large
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should not be provided at the corners
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should be spaced at a distance of 3 m apart in case of huge structures
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| 6. | The final operation of finishing the concrete surface is called ? | |
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screeding
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floating
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trowelling
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none of these
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| 7. | After the curing of 28 days, the concrete gains strength upto ? | |
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40%
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67%
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100%
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122%
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| 8. | For concreting of tunnel lining, the concrete is transported by ? | |
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pumps
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pans
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wheel barrows
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containers
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| 9. | When the batching of material is done by weight ? | |
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the bucket in which the material is to be weighed should be cleaned thoroughly
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the weighing machine should be levelled before placing the material
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the chart should be prepared indicating the weight of each material used for different strengths of concrete
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all of the above
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| 10. | If 50 kg of fine aggregates and 100 kg of coarse aggregates are mixed in a concrete whose water-cement ratio is 0.6, the weight of water required for harsh mix is ? | |
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8 kg
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10 kg
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12 kg
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14 kg
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