Concrete Technology MCQs with answers Page - 54

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Q. The rule of water cement ratio was established by ?

  • (A) Duff Abram
  • (B) Plowman
  • (C) W. Simms
  • (D) Dr. Karl Terzaghi

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Q. The resistance of an aggregate to the effect of hydration of cement and weather is called ?

  • (A) crushing value
  • (B) impact value
  • (C) abrasion value
  • (D) soundness

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Q. The aggregates of ............... shape have minimum voids ?

  • (A) irregular
  • (B) angular
  • (C) rounded
  • (D) flaky

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Q. The phenomenon by virtue of which the cement does not undergo large change in volume treated with water, is known as ?

  • (A) fineness
  • (B) soundness
  • (C) setting time
  • (D) none of these

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Q. The maximum quantity of aggregate per 50 kg of cement should not exceed ?

  • (A) 100 kg
  • (B) 200 kg
  • (C) 350 kg
  • (D) 450 kg

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Q. Lime when added in excess quantity ?

  • (A) makes the cement unsound
  • (B) causes the cement to expand and disintegrate
  • (C) lowers the clinkering temperature of cement
  • (D) both (a) and (b)

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Q. The light-weight concrete is prepared by ?

  • (A) mixing Portland cement with sawdust in specified proportion in the concrete
  • (B) using coke-breeze, cinder or slag as aggregate in the concrete
  • (C) mixing aluminium in the concrete
  • (D) none of the above

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Q. An aggregate which may contain some moisture in the pores but having dry surface is known as ?

  • (A) very dry aggregate
  • (B) dry aggregate
  • (C) saturated surface dry aggregate
  • (D) moist aggregate

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Q. In the manufacture of cement, the dry or wet mixture of calcareous and argillaceous materials burnt in a ?

  • (A) country kiln
  • (B) continuous flare kiln
  • (C) rotary kiln
  • (D) all of these

A

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Q. The tricalcium aluminate in cement has the property of ?

  • (A) reacting fast with water
  • (B) causing initial setting of cement
  • (C) generating large amount of heat hydration
  • (D) all of these

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