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MCQs

Total Questions : 1012 | Page 3 of 102 pages
Question 21. Cube strength of controlled concrete to be used for pretensioned and post-tensioned work respectively should not be less than
  1.    35 MPa and 42 MPa
  2.    42 MPa and 35 MPa
  3.    42 MPa and 53 MPa
  4.    53 MPa and 42 MPa
 Discuss Question
Answer: Option B. -> 42 MPa and 35 MPa
Question 22. Workability of concrete is inversely proportional to
  1.    time of transit
  2.    vater-cement ratio
  3.    the air in the mix
  4.    size of aggregate
 Discuss Question
Answer: Option A. -> time of transit
Question 23. The individual variation between test strength of sample should not be more than
  1.    ±5% of average
  2.    ± 10% of average
  3.    ± 15% of average
  4.    ±20% of average
 Discuss Question
Answer: Option C. -> ± 15% of average
Question 24. For a slab supported on its four edges with corners held down and loaded uniformly, the Marcus correction factor to the moments obtained by Grashoff Rankine’s theory
  1.    is always less than 1
  2.    is always greater than 1
  3.    can be more than 1
  4.    can be less than 1
 Discuss Question
Answer: Option A. -> is always less than 1
Question 25. To determine the modulus of rupture, the size of test specimen used is
  1.    150 x150 x500 mm
  2.    100 x100 x700 mm
  3.    150 x150 x700 mm
  4.    100 x100 x500 mm
 Discuss Question
Answer: Option C. -> 150 x150 x700 mm
Question 26. High carbon content in the steel causes
  1.    decrease in tensile strength but increase in ductility
  2.    increase in tensile strength but decrease in ductility
  3.    decrease in both tensile strength and ductility
  4.    increase in both tensile strength and ductility
 Discuss Question
Answer: Option B. -> increase in tensile strength but decrease in ductility
Question 27. The slab is designed as one way if the ratio of long span to short span is
  1.    less than 1
  2.    between 1 and 1.5
  3.    between 1.5 and 2
  4.    greater than 2
 Discuss Question
Answer: Option D. -> greater than 2
Question 28. A continuous beam is deemed to be a deep beam when the ratio of effective span to overall depth (1/D) is less than
  1.    1.5
  2.    2.0
  3.    2.5
  4.    3.0
 Discuss Question
Answer: Option C. -> 2.5
Question 29. According to IS : 456- 1978, minimum slenderness ratio for a short column is
  1.    less than 12
  2.    less than 18
  3.    between 18 and 24
  4.    more than 24
 Discuss Question
Answer: Option A. -> less than 12
Question 30. Maximum percentage reinforcement in case of slabs is limited to
  1.    2
  2.    4
  3.    6
  4.    8
 Discuss Question
Answer: Option B. -> 4

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