RCC Structures Design MCQ Questions & Answers

71

Pick up the true statement from the following:

A) Plain ceiling provides the best property diffusing light B) In the absence of beams, it is easier to install piping C) In the absence of beams, it is easier to paint D) All the above

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Answer & Solution

Answer: Option D

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72

If ‘p’ is the net upward pressure on a square footing of side ‘b’ for a square column of side ‘a’, the maximum bending moment is given by

A) $${\text{B}}{\text{.M}}{\text{.}} = \frac{{{\text{pb}}\left( {{\text{c}} - {\text{a}}} \right)}}{4}$$ B) $${\text{B}}{\text{.M}}{\text{.}} = \frac{{{\text{pb}}{{\left( {{\text{b}} - {\text{a}}} \right)}^2}}}{4}$$ C) $${\text{B}}{\text{.M}}{\text{.}} = \frac{{{\text{pb}}{{\left( {{\text{b}} - {\text{a}}} \right)}^2}}}{8}$$ D) $${\text{B}}{\text{.M}}{\text{.}} = \frac{{{\text{pb}}\left( {{\text{b}} + {\text{a}}} \right)}}{8}$$

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Answer & Solution

Answer: Option C

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73

The toe projection of foundation slabs is taken

A) As one third of the base B) As one sixth of overall height of the wall C) Equal to heel slab D) Below ground surface

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Answer & Solution

Answer: Option A

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74

The maximum ratio of span to depth of a slab simply supported and spanning in one direction, is

A) 35 B) 25 C) 30 D) 20

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Answer & Solution

Answer: Option C

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75

In a doubly-reinforced beam if ‘c’ and ‘t’ are stresses in concrete and tension reinforcement, ‘d’ is the effective depth and ‘n’ is depth of critical neutral axis, the following relationship holds good

A) $$\frac{{{\text{mc}}}}{{\text{t}}} = \frac{{\text{n}}}{{{\text{d}} - {\text{n}}}}$$ B) $$\frac{{{\text{m}} + {\text{c}}}}{{\text{t}}} = \frac{{\text{n}}}{{{\text{d}} + {\text{n}}}}$$ C) $$\frac{{{\text{t}} + {\text{c}}}}{{\text{m}}} = \frac{{{\text{d}} + {\text{n}}}}{{\text{n}}}$$ D) $$\frac{{\text{m}}}{{{\text{t}} + {\text{c}}}} = \frac{{\text{n}}}{{{\text{d}} - {\text{n}}}}$$

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Answer & Solution

Answer: Option A

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76

The zone in which transverse bending is likely to occur may be obtained by drawing a line from the faces of the column making an angle θ° with horizontal where θ° is

A) 30° B) 45° C) 60° D) None of these

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Answer & Solution

Answer: Option B

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77

The width of the flange of a L-beam, should be less than

A) One-sixth of the effective span B) Breadth of the rib + four times thickness of the slab C) Breadth of the rib + half clear distance between ribs D) Least of the above

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Answer & Solution

Answer: Option D

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78

The width of the flange of a T-beam should be less than

A) One-third of the effective span of the T-beam B) Distance between the centers of T-beam C) Breadth of the rib plus twelve times the thickness of the slab D) Least of the above

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Answer & Solution

Answer: Option D

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79

A continuous beam shall be deemed to be a deep beam if the ratio of effective span to overall depth, is

A) 2.5 B) 2.0 C) Less than 2 D) Less than 2.5

Discuss

Answer & Solution

Answer: Option D

Solution:

In reinforced cement concrete (RCC) design, beams are classified as shallow or deep based on the ratio of their effective span to overall depth.

A deep beam is one in which the span is relatively short compared to its depth, leading to significant shear deformation and nonlinear strain distribution.

According to IS 456:2000 (Indian Standard for RCC design), a continuous beam is considered a deep beam if the ratio of effective span to overall depth is less than 2.5.

This classification affects how the beam is analyzed and designed, as deep beams do not follow conventional beam theory and require special design considerations.

Therefore, the correct answer is: Less than 2.5 (Option D).

80

If the loading on a pre-stressed rectangular beam, is uniformly distributed, the tendon to be provided should be.

A) Straight below centroidal axis B) Parabolic with convexity downward C) Parabolic with convexity upward D) Straight above centroidal axis

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Answer & Solution

Answer: Option B

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RCC Structures Design MCQ Questions & Answers | Civil Engineering