Concrete Technology MCQs with answers Page - 9

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A

Admin • 833.24K Points
Coach

Q. Super plasticizers reduce water requirement by ___________ %.

  • (A) 12-30
  • (B) 10-15
  • (C) 30-42
  • (D) 48

A

Admin • 833.24K Points
Coach

Q. Damp proofing is done with a __________ based mixture.

  • (A) Sand
  • (B) Tar
  • (C) Rubber
  • (D) Lead

A

Admin • 833.24K Points
Coach

Q. What is water proofing admixtures?

  • (A) Water repellent materials
  • (B) Water fair material
  • (C) Water absorption material
  • (D) Water adsorption material

A

Admin • 833.24K Points
Coach

Q. Which one is not a chemically active pore filling material?

  • (A) Silicate of soda
  • (B) Aluminium
  • (C) Chalk
  • (D) Zinc

A

Admin • 833.24K Points
Coach

Q. Blast furnace slag cement is used for

  • (A) dams
  • (B) bridge abutments
  • (C) retaining walls
  • (D) all of these

A

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Coach

Q. If the slump of concrete mix is 70 mm, its workability is considered to be

  • (A) very low
  • (B) low
  • (C) medium
  • (D) high

A

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Q. The prestressed cement concrete can take up high tensile and compressive stresses without development of cracks.

  • (A) Correct
  • (B) Incorrect
  • (C) ---
  • (D) ---

A

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Q. The gypsum is added to the cement for

  • (A) providing high strength to the cement
  • (B) controlling the initial setting time of cement
  • (C) lowering the clinkering temperature of cement
  • (D) all of the above

A

Admin • 833.24K Points
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Q. The degree of grinding of cement is called

  • (A) fineness
  • (B) soundness
  • (C) impact value
  • (D) bulking

A

Admin • 833.24K Points
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Q. In performing preliminary test

  • (A) the moulds requred for test specimens should be rigid
  • (B) the mxi should be stored in air=tight containers
  • (C) the aggregates should be dry
  • (D) all of the above

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