Concrete Technology MCQs with answers Page - 42

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Q. The process of proper and accurate measurement of all concrete materials for uniformity of proportions and aggregate grading is called ?

  • (A) proportioning
  • (B) grading
  • (C) mixing
  • (D) batching

A

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Q. The construction joints in cement concrete ?

  • (A) should be located where bending moment is large
  • (B) should be located where shear force is large
  • (C) should not be provided at the corners
  • (D) should be spaced at a distance of 3 m apart in case of huge structures

A

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Q. The final operation of finishing the concrete surface is called ?

  • (A) screeding
  • (B) floating
  • (C) trowelling
  • (D) none of these

A

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Q. After the curing of 28 days, the concrete gains strength upto ?

  • (A) 40%
  • (B) 67%
  • (C) 100%
  • (D) 122%

A

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Q. For concreting of tunnel lining, the concrete is transported by ?

  • (A) pumps
  • (B) pans
  • (C) wheel barrows
  • (D) containers

A

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Q. When the batching of material is done by weight ?

  • (A) the bucket in which the material is to be weighed should be cleaned thoroughly
  • (B) the weighing machine should be levelled before placing the material
  • (C) the chart should be prepared indicating the weight of each material used for different strengths of concrete
  • (D) all of the above

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Q. If 50 kg of fine aggregates and 100 kg of coarse aggregates are mixed in a concrete whose water-cement ratio is 0.6, the weight of water required for harsh mix is ?

  • (A) 8 kg
  • (B) 10 kg
  • (C) 12 kg
  • (D) 14 kg

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Q. To prevent the cement bags from any possible contact with moisture, the main point that should be kept in mind is that the ?

  • (A) space between the exterior walls and piles should be 30 cm
  • (B) cement bags should be placed closer together in the piles
  • (C) width and height of the pile should not exceed 3 m and 2.70 m respectively
  • (D) all of the above

A

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Q. The workability of concrete can be improved by adding ?

  • (A) hydrated lime
  • (B) flyash
  • (C) calcium chloride
  • (D) all of these

A

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Q. If the effective plan area of a warehouse is 54 m², and the maximum height of pile permitted is I then the number of cement bags to be stored is ?

  • (A) 2000
  • (B) 2200
  • (C) 2500
  • (D) 2700

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