Concrete Technology MCQs with answers Page - 83

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Q. Minimum thickness of load bearing RCC wall should be

  • (A) 50 mm
  • (B) 100 mm
  • (C) 150 mm
  • (D) 200 mm

A

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Q. M 150 grade of concrete approximates

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

A

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Q. Permissible compressive strength of M 300 concrete grade is

  • (A) 100 kg/cm2
  • (B) 150 kg/cm2
  • (C) 200 kg/cm2
  • (D) 300 kg/cm2

A

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Q. Strength of concrete increases with

  • (A) increase in water-cement ratio
  • (B) increase in fineness of cement
  • (C) decrease in curing time
  • (D) decrease in size of aggregate

A

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Q. For ensuring quality of concrete, use

  • (A) single sized aggregates
  • (B) two sized aggregate
  • (C) graded aggregates
  • (D) coarse aggregates

A

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Q. In working stress design, permissible bond stress in the case of deformed bars is more than that in plain bars by

  • (A) 10 %
  • (B) 20 %
  • (C) 30 %
  • (D) 40 %

A

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Q. The rock which is not calcareous, is:

  • (A) lime stone
  • (B) chalk
  • (C) laterite
  • (D) none of these

A

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Q. A T-shaped retaining wall mainly consists of

  • (A) one cantilever
  • (B) two cantilevers
  • (C) three cantilevers
  • (D) four cantilevers

A

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Q. The fineness modulus of fine aggregate is in the range of

  • (A) 2.0 to 3.5
  • (B) 3.5 to 5.0
  • (C) 5.0 to 7.0
  • (D) 6.0 to 8.5

A

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Q. Which of the following has high tensile strength?

  • (A) plain hot rolled wires
  • (B) cold drawn wires
  • (C) heat treated rolled wires
  • (D) all have same tensile strength

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