Concrete Technology MCQs with answers Page - 87

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Q. The compaction of concrete, improves

  • (A) density
  • (B) strength
  • (C) durability
  • (D) all the above

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Q. Segregation is responsible for

  • (A) honey-combed concrete
  • (B) porous layers in concrete
  • (C) surface scaling in concrete
  • (D) all the above

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Q. If the effective working time is 7 hours and per batch time of concrete is 3 minutes, the output of a concrete mixer of 150 litre capacity, is

  • (A) 15,900 litres
  • (B) 16,900 litres
  • (C) 17,900 litres
  • (D) 18,900 litres

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Q. An ordinary Portland cement when tested for its fineness, should not leave any residue on I.S. sieve No. 9, more than

  • (A) 5 %
  • (B) 10 %
  • (C) 15 %
  • (D) 20 %

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Q. The top diameter, bottom diameter and the height of a slump mould are:

  • (A) 10 cm, 20 cm, 30 cm
  • (B) 10 cm, 30 cm, 20 cm
  • (C) 20 cm, 10 cm, 30 cm
  • (D) 20 cm, 30 cm, 10 cm

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