Concrete Technology and Design Objective Questions and Answers - Set 01

Practice Test: Question Set - 01

1. The temperature reinforcement in the vertical slab of a T-shaped R.C. retaining wall is
    (A) Not needed
    (B) Provided equally on inner and front faces
    (C) Provided more on inner face than on front face
    (D) Provided more on front face than on inner face

2. Bulking of sand is maximum if moisture content is about
    (A) 2 %
    (B) 4 %
    (C) 6 %
    (D) 10 %

3. Diagonal tension in a beam
    (A) Is maximum at neutral axis
    (B) Decreases below the neutral axis and increases above the neutral axis
    (C) Increases below the neutral axis and decreases above the neutral axis
    (D) Remains same

4. According to IS: 4561978, the column or the strut is the member whose effective length is greater than
    (A) The least lateral dimension
    (B) 2 times the least lateral dimension
    (C) 3 times the least lateral dimension
    (D) 4 times the least lateral dimension

5. When shear stress exceeds the permissible limit in a slab, then it is reduced by
    (A) Increasing the depth
    (B) Providing shear reinforcement
    (C) Using high strength steel
    (D) Using thinner bars but more in number

6. The diameter of ties in a column should be
    (A) More than or equal to one fourth of diameter of main bar
    (B) More than or equal to 5 mm
    (C) More than 5 mm but less than one-fourth of diameter of main bar
    (D) More than 5 mm and also more than one-fourth of diameter of main bar

7. In counterfort retaining walls, the main reinforcement in the stem at support is
    (A) Not provided
    (B) Provided only on inner face
    (C) Provided only on front face
    (D) Provided both on inner and front faces

8. Due to shrinkage stresses, a simply supported beam having reinforcement only at bottom tends to
    (A) Deflect downward
    (B) Deflect upward
    (C) Deflect downward or upward
    (D) None of the above

9. The purpose of reinforcement in pre-stressed concrete is
    (A) To provide adequate bond stress
    (B) To resist tensile stresses
    (C) To impart initial compressive stress in concrete
    (D) All of the above

10. Select the correct statement
    (A) Elastic modulus of high tensile steel is nearly the same as that of mild steel
    (B) Elastic modulus of high tensile steel is more than that of mild steel
    (C) Carbon percentage in high carbon steel is less than that in mild steel
    (D) High tensile steel is cheaper than mild steel

11. To minimize the effect of differential settlement, the area of a footing should be designed for
    (A) Dead load only
    (B) Dead load + live load
    (C) Dead load + fraction of live load
    (D) Live load + fraction of dead load

12. Due to circumferential action of the spiral in a spirally reinforced column
    (A) Capacity of column is decreased
    (B) Ductility of column reduces
    (C) Capacity of column is decreased but ductility of column increases
    (D) Both the capacity of column and ductility of column increase

13. For concreting of heavily reinforced sections without vibration, the workability of concrete expressed as compacting factor should be
    (A) 0.75 - 0.80
    (B) 0.80 - 0.85
    (C) 0.85 - 0.92
    (D) Above 0.92

14. Workability of concrete is directly proportional to
    (A) Aggregate cement ratio
    (B) Time of transit
    (C) Grading of the aggregate
    (D) All of above

15. Which of the following statements is incorrect?
    (A) Minimum cross sectional area of longitudinal reinforcement in a column is 0.8%
    (B) Spacing of longitudinal bars measured along the periphery of column should not exceed 300 mm
    (C) Reinforcing bars in a column should not be less than 12 mm in diameter
    (D) The number of longitudinal bars provided in a circular column should not be less than four

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