Building Materials MCQs with answers Page - 13

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Q. Poor or lean lime ?

  • (A) slakes rapidly with considerable evolution of heat
  • (B) takes very long time to develop adequate strength
  • (C) has high plasticity
  • (D) none of the above

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Q. Which of the following is an example of silicious rock ?

  • (A) Granite
  • (B) Gneiss
  • (C) Quartzite
  • (D) all of these

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Q. Gypsum is added in the manufacture of Portland cement ?

  • (A) while mixing the raw materials
  • (B) during burning in the rotary kiln
  • (C) at the beginning of grinding the clinker
  • (D) at the end of grinding the clinker into powder

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Q. The rocks formed due to solidification of molten mass laying below or above the earth surface are called ?

  • (A) aqueous rocks
  • (B) sedimentary rocks
  • (C) metamorphic rocks
  • (D) igneous rocks

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Q. Laterite is chemically classified as ?

  • (A) calcareous rock
  • (B) argillaceous rock
  • (C) silicious rock
  • (D) metamorphic rock

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Q. Marble is an example of ?

  • (A) aqueous rock
  • (B) metamorphic rock
  • (C) sedimentary rock
  • (D) igneous rock

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Q. A limestone containing about 30% of alumina ?

  • (A) granular limestone
  • (B) compact limestone
  • (C) magnesium limestone
  • (D) kankar

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Q. The process of adding the required quantity of water to quick lime in order to convert it into hydrated lime, is known as ?

  • (A) calcination
  • (B) hydration
  • (C) slaking
  • (D) quenching

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Q. Distemper is used on ?

  • (A) brick walls
  • (B) concrete surfaces
  • (C) plastered surfaces exposed to weather
  • (D) plastered surfaces not exposed to weather

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Q. Gypsum is added in the manufacture of Portland cement in order to ?

  • (A) shorten the setting time of cement
  • (B) length setting time of cement
  • (C) decrease the burning temperature
  • (D) decrease the grinding time

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