Concrete Technology (Civil Engineering) - MCQs


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Q1.
An air entraining agent when added in concrete improves :
  • A. strength
  • B. workability
  • C. density
  • D. durability

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Q2.
For making impermeable concrete, the process contains :
  • A. through mixing
  • B. proper compaction
  • C. proper curing
  • D. all of these

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Q3.
Strength of concrete is directly proportional to :
  • A. cement water ratio
  • B. water cement ratio
  • C. sand cement ratio
  • D. water aggregate ratio

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Q4.
After casting ,on ordinary cement concrete on drying :
  • A. shrinks
  • B. expands
  • C. remain unchanged
  • D. can expend or strink

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Q5.
Strength of concrete increases with increases in :
  • A. water cement ratio
  • B. size of aggregate
  • C. aggregate cement ratio
  • D. moisture content

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Q6.
Approximate ratio of strength of cement concrete at 3 months to that at 28 days of curing is :
  • A. 1.15
  • B. 1.30
  • C. 1.0
  • D. 0.75

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