Concrete Technology MCQs with answers Page - 13

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A

Admin • 833.24K Points
Coach

Q. What is curing?

  • (A) Dehydration
  • (B) Hydration
  • (C) Drying
  • (D) Dipping

A

Admin • 833.24K Points
Coach

Q. What is the gel/space ratio?

  • (A) Volume of water to the volume of cement
  • (B) Volume of the hydrated cement paste to the sum of volumes of the hydrated cement
  • (C) Volume of the hydrated cement paste to the sum of volumes of the hydrated cement and of the capillary pores
  • (D) Volume of gel to the volume of space present in the concrete

A

Admin • 833.24K Points
Coach

Q. Gel/Space ratio = x = Volume of gel / Space available = 0.657 C / 0.319 C+ Wo. Here Wo stands for?

  • (A) Weight of cement in kg
  • (B) Weight of cement in g
  • (C) Volume of gel
  • (D) Volume of mixing water in ml

A

Admin • 833.24K Points
Coach

Q. This strain increases over time due to _________

  • (A) Creep
  • (B) Elastic modulus
  • (C) Short term modulus of elasticity
  • (D) Long term modulus of elasticity

A

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Q. If the stress is removed, the specimen shows an instantaneous recovery strain ___ the elastic strain on loading.

  • (A) Higher than
  • (B) Lower than
  • (C) Equal to
  • (D) Much greater than

A

Admin • 833.24K Points
Coach

Q. Creep ___ as the age of application of load _____

  • (A) Increase, increase
  • (B) Increase, decrease
  • (C) Decrease, decrease
  • (D) Decrease, increase

A

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Q. Shrinkage is the reduction in the volume of a fresh hardened concrete exposed to ambient temp and humidity.

  • (A) True
  • (B) False
  • (C) none
  • (D) all

A

Admin • 833.24K Points
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Q. Durability of concrete is proportional to _________

  • (A) Sand content
  • (B) Water cement ratio
  • (C) Aggregate ratio
  • (D) Cement aggregate ratio

A

Admin • 833.24K Points
Coach

Q. For concrete exposed to a very aggressive environment the w/c should be lower than __________

  • (A) 1
  • (B) .5
  • (C) 4
  • (D) .8

A

Admin • 833.24K Points
Coach

Q. The quality of concrete, specifically a ____________ w/c ratio, is the best protection against sulphate attack.

  • (A) High
  • (B) Medium
  • (C) Low
  • (D) Very low

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