Concrete Technology MCQs with answers Page - 73

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Q. The bulk density of aggregates does not depend upon:

  • (A) size and shape of aggregates
  • (B) specific gravity of aggregates
  • (C) grading of aggregates
  • (D) size and shape of the container

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Q. How long will it take for the concrete to achieve 100% of its strength?

  • (A) 7 days
  • (B) 14 days
  • (C) 21 days
  • (D) 28 days

A

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Q. A higher modular ratio shows

  • (A) higher compressive strength of concrete
  • (B) lower compressive strength of concrete
  • (C) higher tensile strength of steel
  • (D) lower tensile strength of steel

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Q. For the construction of cement concrete floor, the maximum permissible size of aggregate, is

  • (A) 4 mm
  • (B) 6 mm
  • (C) 8 mm
  • (D) 10 mm

A

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Q. The main reinforcement in the heel of a T-shaped R.C. retaining wall is provided on

  • (A) top face perpendicular to wall
  • (B) bottom face perpendicular to wall
  • (C) both top and bottom faces perpendicular to wall
  • (D) none of the above

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Q. Separation of coarse aggregates from mortar during transportation, is known

  • (A) bleeding
  • (B) creeping
  • (C) segregation
  • (D) shrinkage

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Q. A flaky aggregate is said to be elongated if its length is

  • (A) equal to the mean size
  • (B) twice the mean size
  • (C) thrice the mean size
  • (D) four times the mean size

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Q. You are asked to construct a massive dam, the type of cement you will use, is

  • (A) ordinary portland cement
  • (B) rapid hardening cement
  • (C) low heat cement
  • (D) blast furnace slag cement

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Q. An ideal ware house, is provided

  • (A) water proof masonry walls
  • (B) water proof roof
  • (C) few windows which remain generally closed
  • (D) all the above

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Q. Normally pre-stressing wires are arranged in the

  • (A) upper part of the beam
  • (B) lower part of the beam
  • (C) center
  • (D) anywhere

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