Building Materials MCQs with answers Page - 15

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Q. The dry process of mixing is usually employed in the manufacture of Portland cement when the raw material is ?

  • (A) blast furnace slag
  • (B) chalk
  • (C) clay
  • (D) all of these

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Q. Which of the following constituent, when present in excess quantity in clay causes the bricks to melt and distort during burning ?

  • (A) Alumina
  • (B) Silica
  • (C) Lime
  • (D) Alkalies

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Q. The fuel generally used for burning limestone is ?

  • (A) coal
  • (B) charcoal
  • (C) firewood
  • (D) any one of these

A

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Q. The silicious sandstone which has been subjected to metamorphic action, is called ?

  • (A) moorum
  • (B) laterite
  • (C) quartzite
  • (D) dolomite

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Q. The length of a curved tile varies from ?

  • (A) 10 to 12 cm
  • (B) 12 to 15 cm
  • (C) 15 to 20 cm
  • (D) 20 to 22.5 cm

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Q. The rapid hardening Portland cement is obtained by ?

  • (A) grinding the clinker to a high degree of fineness
  • (B) adding calcium sulphate to the mixture
  • (C) adding gypsum after grinding
  • (D) burning the mixture at a lower temperature

A

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Q. The ultimate strength of cement is provided by ?

  • (A) silica
  • (B) di-calcium silicate
  • (C) tri-calcium silicate
  • (D) tri-calcium aluminate

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Q. Lime is used ?

  • (A) as a matrix for concrete
  • (B) for plastering walls, ceilings etc
  • (C) for improving soil for agricultural purposes
  • (D) all of the above

A

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Q. The expansion of Portland cement is caused by ?

  • (A) free lime
  • (B) magnesia
  • (C) silica
  • (D) both (b) and (c)

A

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Q. The fineness of cement is tested by ?

  • (A) air-permeability method
  • (B) Le-chatelier method
  • (C) Vicat's apparatus
  • (D) all of these

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