RCC Structures Design MCQ Questions & Answers

11

The maximum shear stress (q) in concrete of a reinforced cement concrete beam is

A) $$\frac{{{\text{Shear force}}}}{{{\text{Lever arm}} \times {\text{Width}}}}$$ B) $$\frac{{{\text{Lever arm}}}}{{{\text{Shear force}} \times {\text{Width}}}}$$ C) $$\frac{{{\text{Width}}}}{{{\text{Lever arm}} \times {\text{Shear force}}}}$$ D) $$\frac{{{\text{Shear force}} \times {\text{Width}}}}{{{\text{Lever arm}}}}$$

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Answer & Solution

Answer: Option A

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12

If the length of an intermediate span of a continuous slab is 5 m, the length of the end span is kept

A) 4.5 m B) 4.0 m C) 3.5 m D) 3.0 m

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Answer & Solution

Answer: Option A

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13

If the tendon is placed at an eccentricity e below the centroidal axis of the longitudinal axis of a rectangular beam (sectional modulus Z and stressed load P in tendon) the stress at the extreme top edge

A) Is increased by $$\frac{{{\text{PZ}}}}{{\text{e}}}$$ B) Is increased by $$\frac{{{\text{Pe}}}}{{\text{Z}}}$$ C) Is decreased by $$\frac{{{\text{Pe}}}}{{\text{Z}}}$$ D) Remains unchanged

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Answer & Solution

Answer: Option C

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14

A foundation is called shallow if its depth, is

A) One-fourth of its width B) Half of its width C) Three-fourth of its width D) Equal to its width

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Answer & Solution

Answer: Option D

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15

If the sides of a slab simply supported on edges and spanning in two directions are equal, the maximum bending moment is multiplied by

A) 0.2 B) 0.3 C) 0.4 D) 0.5

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Answer & Solution

Answer: Option D

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16

A T-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis

A) Remains within the flange B) Remains below the slab C) Coincides the geometrical centre of the beam D) None of these

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Answer & Solution

Answer: Option A

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17

An R.C.C. beam of 6 m span is 30 cm wide and has a lever arm of 55 cm. If it carries a U.D.L. of 12 t per m and allowable shear stress is 5 kg/cm², the beam

A) Is safe in shear B) Is safe with stirrups C) Is safe with stirrups and inclined bars D) Needs revision of section

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Answer & Solution

Answer: Option D

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18

A pre-stressed rectangular beam which carries two concentrated loads W at $$\frac{{\text{L}}}{3}$$ from either end, is provided with a bent tendon with tension P such that central one-third portion of the tendon remains parallel to the longitudinal axis, the maximum dip h is

A) $$\frac{{{\text{WL}}}}{{\text{P}}}$$ B) $$\frac{{{\text{WL}}}}{{2{\text{P}}}}$$ C) $$\frac{{{\text{WL}}}}{{3{\text{P}}}}$$ D) $$\frac{{{\text{WL}}}}{{4{\text{P}}}}$$

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Answer & Solution

Answer: Option C

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19

According to I.S. : 456, slabs which span in two directions with corners held down, are assumed to be divided in each direction into middle strips and edge strips such that the width of the middle strip, is

A) Half of the width of the slab B) Two-third of the width of the slab C) Three-fourth of the width of the slab D) Four-fifth of the width of the slab

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Answer & Solution

Answer: Option C

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20

If the permissible compressive stress for a concrete in bending is C kg/m², the modular ratio is

A) 2800/C B) 2300/2C C) 2800/3C D) 2800/C²

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Answer & Solution

Answer: Option C

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RCC Structures Design MCQ Questions & Answers | Civil Engineering