Concrete Technology MCQs with answers Page - 72

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Q. The minimum diameter of longitudinal bars in a column is

  • (A) 6 mm
  • (B) 8 mm
  • (C) 12 mm
  • (D) 16 mm

A

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Q. The high strength of rapid hardening cement at early stage, is due to its

  • (A) finer grinding
  • (B) burning at high temperature
  • (C) increased lime cement
  • (D) higher content of tricalcium

A

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Q. Sand requiring a high water cement ratio, belongs to

  • (A) zone i
  • (B) zone ii
  • (C) zone iii
  • (D) zone iv

A

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Q. Minimum grade of concrete to be used in reinforced concrete as per IS: 4561978 is

  • (A) m 15
  • (B) m 20
  • (C) m 10
  • (D) m 25

A

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Q. While compacting the concrete by a mechanical vibrator, the slump should not exceed

  • (A) 2.5 cm
  • (B) 5.0 cm
  • (C) 7.5 cm
  • (D) 10 cm

A

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Q. Non-uniform compaction may cause the concrete

  • (A) porous
  • (B) non-homogeneous
  • (C) reduced strength
  • (D) all the above

A

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Q. Modulus of rupture of concrete is a measure of

  • (A) flexural tensile strength
  • (B) direct tensile strength
  • (C) compressive strength
  • (D) split tensile strength

A

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Q. M10 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. Higher workability of concrete is required if the structure is

  • (A) made with cement concrete
  • (B) thick and reinforced
  • (C) thin and heavily reinforced
  • (D) thick and heavily reinforced

A

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Q. For a cantilever of effective depth of 0.5 m, the maximum span to satisfy vertical deflection limit is

  • (A) 3.5 m
  • (B) 4 m
  • (C) 4.5 m
  • (D) 5 m

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