| 1. | The Indian standard code specifies that the crushing strength for which the mix should be designed in the laboratory should be ................... the strength actually required ? | |
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1.25
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1.5
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2
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2.5
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Report Question| 2. | Which of the following grade is not recommended by IS 456-1978 ? | |
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M 10
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M 55
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M 20
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M 40
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| 3. | The steel mould used for slump test is in the form of a ? | |
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cube
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cylinder
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frustrum of a cone
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none of these
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| 4. | For the improvement of workability of concrete, the shape of aggregate recommended is ? | |
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irregular
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angular
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round
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flaky
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| 5. | The standard sand now used in India is obtained from ? | |
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Ennore (Chennai)
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Mumbai
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Orissa
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Jaipur
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| 6. | For reinforced concrete, the aggregate used is ? | |
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sand
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gravel
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crushed rock
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all of these
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| 7. | A moist aggregate is one ? | |
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whose all the pores are filled with water and also having its surface wet
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whose all the pores are filled with water but having its surface dry
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which do not contain any moisture either in the pores or on the surface
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which may contain some moisture in the pores but having dry surface
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| 8. | The value of fineness modulus for fine sand may range between ? | |
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1.1 to 1.3
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1.3 to 1.6
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1.6 to 2.2
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2.2 to 2.6
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| 9. | Water cement ratio may be defined as the ratio of ? | |
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mass of water to that of cement in a concrete mix
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weight of water to that of cement in a concrete mix
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volume of water to that of concrete in a concrete mix
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weight of water to that of concrete in a concrete mix
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| 10. | Hydration of cement is due to the chemical action of water with ? | |
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dicalcium silicate
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tricalcium silicate
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tricalcium aluminate
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all of these
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