Concrete Technology - Concrete Technology objective questions and answers


11.  The concrete mix which does not give smooth finish easily is said to possess


   A. Hardness

   B. Roughness

   C. Internal friction

   D. Bleeding


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A. Hardness

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12.  Which of the following acts as accelerator for concrete?


   A. Potassium chlorate

   B. Calcium chloride

   C. Copper sulphate

   D. Zinc oxide


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B. Calcium chloride

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13.  The entertained air in concrete results in


   A. Increased strength

   B. Decreased workability

   C. Increased workability

   D. Increased resistance to weathering


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C. Increased workability

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14.  Shrinkage in concrete increases its


   A. Tensile strength

   B. Flexural strength

   C. Bond strength

   D. Compressive strength


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C. Bond strength

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15.  If a concrete gives more strength than the design value


   A. Cement content is reduced

   B. Water percentage is increased

   C. Proportion of sand is changed

   D. Water / cement ratio is changed


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D. Water / cement ratio is changed

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