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

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
by

1 Answer

Answer :

Answer: Option A
by

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The neutral axis in a T-beam section falls (a) Within the flange (b) Outside the flange (c) Either (a) or (b) (d) All the above

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If depth of slab is 10 cm, width of web 30 cm, depth of web 50 cm, centre to centre distance of beams 3 m, effective span of beams 6 m, the effective flange width of the beam, is (A) 200 cm (B) 300 cm (C) 150 cm (D) 100 cm

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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 centres 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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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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The thickness of flange in a T-beam is taken equal to the total thickness of the slab, including cover. (a) True (b) False (c) Not known (d) None of these

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For a reinforced concrete beam section, the shape of shear stress diagram is (a) Parabolic over the whole section with maximum value at the neutral axis. (b) Parabolic above the neutral axis and rectangular below the neutral axis. (c) Linearly varying as the distance form the N.A. (d) All the above.

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The effective depth of a singly reinforced rectangular beam is 300mm. the section is over-reinforced and the neutral axis is 120mm below the top. If the maximum stress attained by concrete is 5N/mn2 and the modular ratio is 18, then the stress developed in the steel will (a) 130N/mm2 (b) 135N/mm2 (c) 160N/mm2 (d) 180N/mm2

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A beam of T-section is subjected to a shear force of F. The maximum shear force will occur at the a. top of the section b. bottom of the section c. neutral axis of the section d. junction of web and flange

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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 PZ/e (B) Is increased by Pe/Z (C) Is decreased by Pe/Z (D) Remains unchanged

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A body floating in a liquid is said to be in neutral equilibrium, if its metacentre (A) Coincides with its centre of gravity (B) Lies above its centre of gravityC) Lies below its centre of gravity (D) Lies between the centre of buoyancy and centre of gravity

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A part of the slab may be considered as the flange of the T-beam if (A) Flange has adequate reinforcement transverse to beam (B) It is built integrally with the beam (C) It is effectively bonded together with the beam (D) All the above

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When a rectangular beam is loaded transversely, the maximum compressive stress develops on (A) Bottom fibre (B) Top fibre (C) Neutral axis (D) Every cross-section

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The depth of the centre of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is (A) 2.4 m (B) 3.0 m (C) 4.0 m (D) 5.0 m

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Pick up the correct statement from the following: (A) A combined footing is so proportioned that centre of gravity of supporting area coincides with centre of gravity of two column loads (B) A combined footing may be either rectangular or trapezoidal in shape (C) Trapezoidal shaped footings may be provided under any loading (D) All the above

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A cast iron T section beam is subjected to pure bending. For maximum compressive stress to be three times the maximum tensile stress, centre of gravity of the section from flange side is (A) h/4 (B) h/3 (C) h/2 (D) 2/3 h

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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 (A) WL/P (B) WL/2P (C) WL/3P (D) WL/4P

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A reinforced concrete beam will crack if tensile stress set up in the concrete below the neutral axis is (a) More than the permissible stress (b) Less than the permissible stress (c) Equal to the permissible stress (d) All the above.

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A singly reinforced concrete beam of 25 cm width and 70 cm effective depth is provided with 18.75 cm2 steel. If the modular ratio (m) is 15, the depth of the neutral axis, is (A) 20 cm (B) 25 cm (C) 30 cm (D) 35 cm

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In a singly reinforced beam, the effective depth is measured form the compression edge to the (a) Tensile edge (b) Centre of tensile reinforcement (c) Neutral axis of the beam (d) All of the above

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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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The length of a rectangular piece of fabric is twice its width . identify the geometrical representation of this situation when represented as an equation in two variables. Width and length be represented as x and y respectively . -Maths 9th

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In a doubly-reinforced beam if and is the effective depth and is depth of critical neutral axis, the following relationship holds good (A) mc/t = n/(d - n) (B) (m + c)/t = n/(d + n) (C) (t + c)/n = (d + n)/nD) mc/t = (d - n)/t

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If the depth of actual neutral axis of a doubly reinforced beam (A) Is greater than the depth of critical neutral axis, the concrete attains its maximum stress earlier (B) Is less than the depth of critical neutral axis, the steel in the tensile zone attains its maximum stress earlier (C) Is equal to the depth of critical neutral axis; the concrete and steel attain their maximum stresses simultaneously (D) All the above

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