RCC Questions (R5)

In this post, I will share some important questions which are frequently asked in competitive examinations such as SSC, UPSC and state PSCs.



  1. When side reinforcement is used in a beam?


    1. the depth of web exceeds 500 mm
    2. the depth of web exceeds 750 mm
    3. the depth of web exceeds 1000 mm
    4. the depth of web exceeds 1250 mm

    View Answer
    Answer: b
    As per IS 456, Cl 26.5.1.3, when the depth of the web exceeds 750 mm, side reinforcement is provided.

  2. What is the minimum percentage of side reinforcement?


    1. 0.1
    2. 0.5
    3. 2.0
    4. 4.0

    View Answer
    Answer: a
    The total minimum side reinforcement to be provided on both side is 0.1 %.

  3. The actual curtailment point of tension reinforcement in flexural member shall be beyond the theoretical curtailment point by ...


    1. the effective depth of the member
    2. 12 times the bar diameter
    3. greater of (a) and (b)
    4. smaller of (a) and (b)

    View Answer
    Answer: c
    As per IS 456, Cl 26.3.2.1, it greater of option (a) and (b).

  4. Select the correct option regarding the extension of the positive moment reinforcement into the support.


    1. at least 1/3 reinforcement in simple members
    2. at least 1/4 reinforcement in continuous members
    3. length of the extension is ${L}_{d}/3$
    4. All are correct

    View Answer
    Answer: d
    Extension of positive reinforcement is done as per IS 456, cl 26.2.3.3

  5. The extension of negative moment reinforcement beyond the point of inflection is ...


    1. 12 times bar diameter
    2. 1/16 of the clear span
    3. smaller of (a) and (b)
    4. greater of (a) and (b)

    View Answer
    Answer: d
    As per IS 456, Cl 26.2.3.4, it is greater of option (a) and (b)

  6. What is the shape of the shear stress distribution above the neutral axis of a beam as per elastic theory?


    1. rectangular
    2. cubic
    3. parabolic
    4. circular

    View Answer
    Answer: c

  7. Flexural cracks make an angle of _____ with the vertical.


    1. $0^\circ$
    2. $30^\circ$
    3. $45^\circ$
    4. $90^\circ$

    View Answer
    Answer: a

  8. Which of the following is the region of diagonal tension cracks?


    1. midspan
    2. adjacent to support
    3. where shear force is significant
    4. where both shear force and bending moment are significant

    1. only (i)
    2. only (ii)
    3. both (ii) and (iii)
    4. both (ii) and (iv)

    View Answer
    Answer: c

  9. Shear span is a zone where


    1. bending moment is zero
    2. shear force is zero
    3. bending moment is constant
    4. shear force is constant

    View Answer
    Answer: d

  10. At which angle (to the horizontal) the shear failure will normally occur in beams and cantilevers without shear reinforcement?


    1. $0^\circ$
    2. $30^\circ$
    3. $45^\circ$
    4. $90^\circ$

    View Answer
    Answer: b
    As per IS 456, Cl 4.5.1, it is $30^\circ$ to the horizontal


  11. At which place the critical section for shear will lie in the case of a secondary beam?


    1. the face of the support
    2. at a distance of effective depth of the beam
    3. at a distance of half the effective depth of the beam
    4. none of the above

    View Answer
    Answer: a
    When support offers a tensile reaction, the critical section for shear for such a case is at the face of the support.
    For more info see IS 456, cl 22.6.2

  12. Maximum spacing between shear reinforcement bar in a beam is ...


    1. 0.75 times the effective depth
    2. 300 mm
    3. smaller of (a) and (b)
    4. greater of (a) and (b)

    View Answer
    Answer: c
    As per IS 456, Cl 26.5.1.5, it is smaller of option (a) and (b)

  13. When nominal shear stress in a beam is not greater than the permissible shear stress then ...


    1. nominal shear reinforcement still provided
    2. no shear reinforcement is provided
    3. shear reinforcement is provided for the difference of nominal and permissible shear stress
    4. none of the above

    View Answer
    Answer: a
    As per IS 456, Cl 40.3, minimum reinforcement is provided when nominal shear stress is less than permissible shear stress.

  14. Shear reinforcement is provided in the form of ...


    1. vertical stirrups
    2. bent-up bars
    3. inclined stirrups
    4. all of the above

    View Answer
    Answer: d

  15. The maximum value of shear stress for a solid slab is ...


    1. equal to that for beam
    2. equal to half to that for beam
    3. equal to 1.5 times to that for beam
    4. equal to twice to that for beam

    View Answer
    Answer: b
    As per IS 456, Cl 40.2.3.1, for solid slabs, maximum shear stress is half to that for beams.





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