| 1. | Efflorescence in cement is caused due to the excess of ? | |
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silica
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lime
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alkalies
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iron oxide
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Report Question| 2. | The material used as an ingredient of concrete is usually ? | |
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cement
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aggregate
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water
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all of these
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| 3. | The cement concrete, from which entrained air and excess water are removed after placing it in position, is called ? | |
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vacuum concrete
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light weight concrete
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prestressed concrete
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sawdust concrete
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| 4. | In making precast structural units for partition and wall lining purposes, the concrete should be ? | |
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sawdust concrete
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air-entrained concrete
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light-weight concrete
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vacuum concrete
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| 5. | The hardening is the phenomenon by virtue of which ? | |
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the cement does not undergo large change in volume when treated with water
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the plastic cement paste changes into hard mass
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the cement paste sets and develops strength
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none of the above
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| 6. | Ferro-concrete is another name given to ? | |
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plain cement concrete
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reinforced cement concrete
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prestressed cement concrete
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none of these
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| 7. | The importance of batching is to obtain ? | |
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strength
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workability
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durability
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all of these
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| 8. | The strength and durability of concrete depends upon ? | |
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size of aggregates
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grading of aggregates
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moisture contents of aggregates
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all of these
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| 9. | The continuous strain, which the concrete undergoes due to application of external loads, is called ? | |
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workability
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bleeding
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segregation
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creep
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| 10. | Reinforced cement concrete is equally strong in taking ? | |
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tensile and compressive stresses
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compressive and shear stresses
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tensile, compressive and shear stresses
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tensile and shear stresses
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