Concrete Technology MCQs with answers Page - 29

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A

Admin • 833.24K Points
Coach

Q. Which of the following statement is correct while compacting concrete with vibrators?

  • (A) The vibrator should be inserted horizontally.
  • (B) The vibrator should not be immersed through a full depth of freshly laid concrete.
  • (C) The vibrator should not touch the form surface.
  • (D) all of the above

A

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Q. The slump test of concrete is used to mesure its

  • (A) consistency
  • (B) mobility
  • (C) homogeneity
  • (D) all of these

A

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Coach

Q. The importance of storing the various ingredients of concrete is

  • (A) to maintain the uniformity of grading
  • (B) to maintain the uniformity of moisture
  • (C) to maintain the strength of materials
  • (D) both (a) and (b)

A

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Q. The resistance of an aggregate to wear is known as

  • (A) shear value
  • (B) crushing value
  • (C) abrasion value
  • (D) impact value

A

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Q. The magnesium oxide and sulphur dioxide when added in excess quantity makes the cement unsound.

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

A

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Q. The minimum quantity of cement to be used in controlled concrete is specified as

  • (A) 120 kg / cm3
  • (B) 160 kg / cm3
  • (C) 220 kg / cm3
  • (D) 280 kg / cm3

A

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Q. The aggregates of rounded shape require minimum cement paste to make good concrete.

  • (A) True
  • (B) False
  • (C) ---
  • (D) ---

A

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Q. For performing the compressive strength test of cement, the size of cube mould should be 7.06 cm side.

  • (A) Right
  • (B) Wrong
  • (C) ---
  • (D) ---

A

Admin • 833.24K Points
Coach

Q. The value of finencess modulus for fine sand may range between

  • (A) 1.1 to 1.3
  • (B) 1.3 to 1.6
  • (C) 1.6 to 2.2
  • (D) 2.2 to 2.6

A

Admin • 833.24K Points
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Q. The final operation of finishing the concrete surface is called

  • (A) screeding
  • (B) floating
  • (C) trowelling
  • (D) none of these

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