Advance Construction Technology MCQs with answers Page - 4

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A

Admin • 833K Points
Coach

Q. Admixtures which reduce setting and hardening of concrete are called………

  • (A) accelerating admixture
  • (B) retarding admixture
  • (C) plasticizers
  • (D) none of the above

A

Admin • 833K Points
Coach

Q. How much calcium chloride is used in the concrete as admixture?

  • (A) 2%
  • (B) 4%
  • (C) 3%
  • (D) 8%

A

Admin • 833K Points
Coach

Q. Which one is use as retarders?

  • (A) gypsum
  • (B) sugars
  • (C) cellulose products
  • (D) all of the above

A

Admin • 833K Points
Coach

Q. Normally………….. gypsum is used in concrete.

  • (A) 2% to 4%
  • (B) 2% to 8%
  • (C) 2% to 9%
  • (D) 3% to 4%

A

Admin • 833K Points
Coach

Q. Super plasticizers reduce a water requirement in concrete up to……

  • (A) 40%
  • (B) 70%
  • (C) 30%
  • (D) 20%

A

Admin • 833K Points
Coach

Q. Which one of these is used as air entraining agent in concrete?

  • (A) natural wood resins
  • (B) animal fats
  • (C) vegetable fats
  • (D) all of the above

A

Admin • 833K Points
Coach

Q. By adding air inside a concrete …………

  • (A) improve workability
  • (B) reeducation in strength
  • (C) reduce permeability
  • (D) all of the above

A

Admin • 833K Points
Coach

Q. Which admixture is used for bonding between old and new surface of concrete?

  • (A) accelerating admixture
  • (B) retarding admixture
  • (C) plasticizers
  • (D) bonding admixture

A

Admin • 833K Points
Coach

Q. Higher dose of the super plasticizers causes………

  • (A) effect on shrinkage properties
  • (B) effect on creep properties
  • (C) a & b both
  • (D) creates a cracks

A

Admin • 833K Points
Coach

Q. Optimum air content in concrete is………..

  • (A) 3% to 6%
  • (B) 4% to 6%
  • (C) 3% to 7%
  • (D) 3% to 4%

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