Concrete Technology MCQs with answers Page - 31

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Q. For highly loaded columns, the concrete mix used is of proportion

  • (A) 1 ; 1 : 2
  • (B) 1 ; 1.5 : 3
  • (C) 1 ; 2 : 4
  • (D) 1 ; 3 : 6

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Q. The importance of batching is to obtain

  • (A) strength
  • (B) workability
  • (C) durability
  • (D) all of these

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Q. Harshness in concrete is due to the excess of

  • (A) water
  • (B) finer particles
  • (C) middle sized particle
  • (D) coarser particles

A

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Q. If the fineness modulus of sand is 3, then the sand is graded as

  • (A) very fine sand
  • (B) fine sand
  • (C) medium sand
  • (D) coarse sand

A

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Q. More water should not be added in the concrete mix, as to increase

  • (A) strength
  • (B) durability
  • (C) water-cement ratio
  • (D) all of these

A

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Q. The concrete mix is said to be workable if it has

  • (A) compatibility
  • (B) movability
  • (C) stability
  • (D) all of these

A

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Q. The maximum particle size of fine aggregate is

  • (A) 2.5 mm
  • (B) 4.75 mm
  • (C) 5.85 mm
  • (D) 6.5 mm

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Q. The size of an aggregate is determined by length gauge.

  • (A) Yes
  • (B) No
  • (C) ---
  • (D) ---

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Q. The aggregate is said to be flaky when

  • (A) its least dimension is three-fifth of its mean dimension
  • (B) its least dimension is equal to its mean dimension
  • (C) its length is equal to its mean dimension
  • (D) its length is equal to 1.8 times its mean dimension

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Q. In designing a ware-house, it is assumed that

  • (A) each bag contains 50 kg of cement
  • (B) floor area occupied by one bag of cement is 0.3 m2
  • (C) height of each cement bag containing 35 litres of cement is 0.18 m
  • (D) all of the above

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