A Best Way To Crack Gorenment Job Exams

Civil Engineering Objective Questions { Structural Design Specifications }



15. For concreting of shallow sections with vibration, the workability of concrete should be
A. very low
B. low
C. medium
D. high.
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16.  For achieving suitably a low permeability ?
A. strong and dense aggregates are used
B. low water ? cement ratio is used
C. proper curing is done for hydration
D. All the above.
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17.  For nominal mix concrete M 20, the required quantity of water per 50 kg. of cement, is
A. 60 litres
B. 45 litres
C. 34 litres
D. 30 litres.
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18.  For nominal mix concrete M 15, the required weight of fine and coarse aggregates is 350 kg and the volume of water is
A. 30 litres
B. 32 litres
C. 34 litres
D. 45 litres.
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19. For the proportions
A. 1 : 1 ?2, the maximum size of aggregates, is 10 mm
B. 1 : 2, the maximum size of aggregates, is 20 mm
C. 1 2 , the maximum size of aggregates, is 40 mm
D. All the above.
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20. Moist sand may contain surface water by mass upto
A.7.50%
B.5.00%
C.2.50%
D. 1.25%.
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21. To achieve uniform colour and consistency of the concrete by using ordinary Portland cement, the mixing time may be
A. j2' to 1 minute
B. 1 to 1-2 minutes,
C. 1-2 to 2 minutes
D. 2 to 2 minutes
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