A Best Way To Crack Gorenment Job Exams

Civil Engineering Objective Questions { Concrete Technology }



183.  Pick up the correct statement from the following :
A. Sand obtained from pits, is washed to remove clay and silt
B. Sand obtained from flooded pits, need not be washed before use
C. Sea shore sand contains chlorides which cause effloresance
D. All the above
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184.  Pick up the correct statement from the following :
A. Sand stones may be divided into calcareous, siliceous and ferrugineous sand stones
B. Concrete using sand stones, cracks due to excessive shrinkage
C. Very hard and close grained crystallined lime stones are suitable aggregates but provide low strength
D. All the above
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185.  Saw dust can be rendered chemically inert by boiling it in water containing
A. ferrous sulphate
B. potassium chloride
C. ammonia
D. nitric acid
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186.  For given workability the grading requiring the least amount of water is one that gives
A. greatest surface area for the given cement and aggregates
B. least surface area for the given cement and aggregates
C. least weight for the given cement and aggregates
D. greatest weight for the given cement and aggregates
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187.  Sand requiring a high water cement ratio, belongs to
A. Zone I
B. Zone II
C. Zone III
D. Zone IV
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188. Sands of zone I are
A. coarse
B. medium
C. medium to fine
D. fine
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189.  Pick up the incorrect statement from the following :
A. In properly graded aggregates, bulk density is more
B. In single size aggregates, bulk density is least
C. In single size aggregates, bulk density is maximum
D. None of these
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