Lakshya Education MCQs

Question: A T-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis
Options:
A.Remains within the flange
B.Remains below the slab
C.Coincides the geometrical centre of the beam
D.None of these
Answer: Option A

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Question 1. 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
  1.    Is safe in shear
  2.    Is safe with stirrups
  3.    Is safe with stirrups and inclined bars
  4.    Needs revision of section
Answer: Option D
Question 2. A pre-stressed rectangular beam which carries two concentrated loads W at 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
  1.    WL/P
  2.    WL/2P
  3.    WL/3P
  4.    WL/4P
Answer: Option C
Question 3. 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
  1.    Half of the width of the slab
  2.    Two-third of the width of the slab
  3.    Three-fourth of the width of the slab
  4.    Four-fifth of the width of the slab
Answer: Option C
Question 4. If the sides of a slab simply supported on edges and spanning in two directions are equal, the maximum bending moment is multiplied by
  1.    0.2
  2.    0.3
  3.    0.4
  4.    0.5
Answer: Option D
Question 5. A foundation is called shallow if its depth, is
  1.    One-fourth of its width
  2.    Half of its width
  3.    Three-fourth of its width
  4.    Equal to its width
Answer: Option D
Question 6. 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
  1.    Is increased by PZ/e
  2.    Is increased by Pe/Z
  3.    Is decreased by Pe/Z
  4.    Remains unchanged
Answer: Option C

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