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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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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14. Shrinkage in concrete increases its
A. Tensile strength
B. Flexural strength
C. Bond strength
D. Compressive 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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