Concrete Technology MCQs with answers Page - 49

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A

Admin • 833.24K Points
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Q. In performing preliminary test ?

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

A

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Q. The ratio of different ingredients (cement, sand and aggregate) in concrete mix of grade M 20 ?

  • (A) 1:1:2
  • (B) 1:1.5:3
  • (C) 1:2:4
  • (D) 1:3:6

A

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Q. The process of mixing, transporting, placing and compacting the cement concrete should not take more than ?

  • (A) 30 minutes
  • (B) 60 minutes
  • (C) 90 minutes
  • (D) 120 minutes

A

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Q. The factor which effect the quality of compaction, is ?

  • (A) density of concrete
  • (B) strength of concrete
  • (C) durability of concrete
  • (D) all of these

A

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Q. According to the rule of water cement ratio, the strength of concrete wholly depends upon ?

  • (A) the quality of cement
  • (B) the quality of cement mixed with aggregate
  • (C) the amount of water used in preparation of concrete mix
  • (D) all of the above

A

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Q. In Vicat's apparatus, the diameter of Vicat plunger is ?

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

A

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Q. The bulk density of aggregates depends upon its ?

  • (A) shape
  • (B) grading
  • (C) compaction
  • (D) all of these

A

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Q. An aggregate is said to be ............. aggregate if its size more than 75 mm ?

  • (A) coarse
  • (B) fine
  • (C) cyclopean
  • (D) none

A

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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. Harshness in concrete is due to the excess of ?

  • (A) water
  • (B) finer particles
  • (C) middle sized particle
  • (D) coarser particles

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