Description : 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
Last Answer : Answer: Option A
Description : The neutral axis of a T-beam exists (A) Within the flange (B) At the bottom edge of the slab (C) Below the slab (D) All the above
Last Answer : Answer: Option D
Description : 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
Last Answer : c. neutral axis of the section
Description : The section of the beam having greater width at the top in comparison to the width below neutral axis is known as. (a) Critical section (b) T-section (c) L-section (d) None of these
Last Answer : (b) T-section
Description : 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
Last Answer : (A) h/4
Description : The neutral axis of an over –reinforced section falls (a) On the critical neutral axis of balanced section. (b) Below the critical neutral axis of balanced section (c) Above the neutral axis o balanced section (d) Al l the above
Last Answer : (b) Below the critical neutral axis of balanced section
Description : At any point of a beam, the section modulus may be obtained by dividing the moment of inertia of the section by (A) Depth of the section (B) Depth of the neutral axis (C) Maximum tensile stress at the section (D) Maximum compressive stress at the section
Last Answer : (B) Depth of the neutral axis
Description : Pick up the correct statement from the following: (A) In a loaded beam, the moment at which the first yield occurs is called yield moment (B) In a loaded beam, the moment at which the ... beam, the neutral axis divides the section in two sections of equal area (D) All the above
Last Answer : (D) All the above
Description : The neutral axis of a beam cross-section must (A) Pass through the centroid of the section (B) Be equidistant from the top of bottom films (C) Be an axis of symmetry of the section (D) None of these
Last Answer : (A) Pass through the centroid of the section
Description : 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
Last Answer : (B) Top fibre
Description : The shear force on a simply supported beam is proportional to (A) Displacement of the neutral axis (B) Sum of the forces (C) Sum of the transverse forces (D) Algebraic sum of the transverse forces of the section
Last Answer : (D) Algebraic sum of the transverse forces of the section
Description : Pick up the incorrect statement from the following. The intensity of horizontal shear stress at the elemental part of a beam section, is directly proportional to (A) Shear force (B) Area of the section ... . of the area from its neutral axis (D) Moment of the beam section about its neutral axis
Description : 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.
Last Answer : (b) Parabolic above the neutral axis and rectangular below the neutral axis.
Description : 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 ... in the steel will (a) 130N/mm2 (b) 135N/mm2 (c) 160N/mm2 (d) 180N/mm2
Last Answer : (b) 135N/mm2
Description : 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)/n D) mc/t = (d - n)/t
Description : A T-section beam having flange 180mm wide and 20 mm thick and web 150 mm long and 20 mm thick carries a udl of 80 kN/m over an effective span of 8 m. Calculate the maximum bending stress.
Last Answer : Solution :
Description : With usual notations the depth of the neutral axis of a balanced section, is given by (A) mc/t = (d - n)/n (B) t/mc = (d - n)/n (C) t/mc = (d + n)/n (D) mc/t = n/(d - n)
Description : What is the shear stress acting along the neutral axis of triangular beam section, with base 60 mm and height 150 mm, when shear force of 30 kN acts? a. 15.36 N/mm2 b. 10.6 N/mm2 c. 8.88 N/mm2 d. Insufficient data
Last Answer : c. 8.88 N/mm2
Description : The width of the flange of a T-beam, which may be considered to act effectively with the rib depends upon (A) Breadth of the rib (B) Overall thickness of the rib (C) Centre to centre distance between T-beams (D) All the above
Description : 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
Description : An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm encasted with the floor of a hall 12 metres by 7 metres, is spaced at 3 metres from adjoining beams and if the width of the beam is ... breadth of the flange is (A) 300 cm (B) 233 cm (C) 176 cm (D) 236 cm
Last Answer : Answer: Option C
Description : 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
Description : The effective depth of a T-beam is the distance between the (a) Centre of the flange and the top of the tensile reinforcement (b) Top of the flange and the centre of the tensile ... centre of the tensile reinforcement (d) Centre of the flange and the bottom centre of the tensile reinforcement
Last Answer : (b) Top of the flange and the centre of the tensile reinforcement
Description : In a T-beam, the vertical distance between the bottom of the flange and the centre of the tensile reinforcement is (a) Breadth of flange (b) Thickness of flange (c) Breadth of slab (d) Depth of rib
Last Answer : (d) Depth of rib
Description : Slab forms the compression flange of the T-beam (a) Yes (b) No (c) Not known (d) None of these
Last Answer : (a) Yes
Description : 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
Last Answer : (a) True
Description : The breadth of the flange of a T-beam is (a) 1/3rd of the effective span of the T-beam (b) Twelve times the depth of slab plus breadth of rib. (c) Centre to centre distance between the adjacent beam. (d) Least of (a) , (b) or (c)
Last Answer : (d) Least of (a) , (b) or (c)
Description : The portion of the slab which acts monolithically with the beam and which resists the compressive stresses, is called _________of flange of the T-beam (a) Length (b) Breadth (c) Thickness (d) Depth
Last Answer : (b) Breadth
Description : The Percentage of steel in T-beam mainly based on [ A ] Flange width [ B ] Rib width [ C ] Flange depth [ D ] None of the above.
Last Answer : [ B ] Rib width
Description : The maximum compressive stress at the top of a beam is 1600 kg/cm2 and the corresponding tensile stress at its bottom is 400 kg/cm2 . If the depth of the beam is 10 cm, the neutral axis from the top, is (A) 2 cm (B) 4 cm (C) 6 cm (D) 8 cm
Last Answer : (D) 8 cm
Description : Along the neutral axis of a simply supported beam (A) Fibres do not undergo strain (B) Fibres undergo minimum strain (C) Fibres undergo maximum strain (D) None of these
Last Answer : (A) Fibres do not undergo strain
Description : In a singly reinforced beam, the effective depth is measured from its compression edge to (A) Tensile edge (B) Tensile reinforcement (C) Neutral axis of the beam (D) Longitudinal central axis
Last Answer : Answer: Option B
Description : If d and n are the effective depth and depth of the neutral axis respectively of a singly reinforced beam, the lever arm of the beam, is (A) d (B) n (C) d + n/3 (D) d - n/3
Description : 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
Description : If the modular ratio is , steel ratio is and overall depth of a beam is , the depth of the critical neutral axis of the beam, is (A) [m/(m - r)] d (B) [m/(m + r)] d (C) [(m + r)/m] d (D) [(r - m)/m] d
Description : 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 ... critical neutral axis; the concrete and steel attain their maximum stresses simultaneously (D) All the above
Description : The stresses developed in concrete and steel in reinforced concrete beam 25 cm width and 70 cm effective depth, are 62.5 kg/cm2 and 250 kg/cm2 respectively. If m = 15, the depth of its neutral axis is (A) 20 cm (B) 25 cm (C) 30 cm (D) 35 cm
Description : A singly reinforced beam has breadth b, effective depth d, depth of neutral axis n and critical neutral axis n1. If fc and ft are permissible compressive and tensile stresses, the moment to resistance of the beam, is (A) bn (fc ... (B) Atft (d - n/3) (C) ½ n1 (1 - n1/3) cbd² (D) All the above
Description : If the depth of actual neutral axis in a beam is more than the depth of critical neutral axis, then the beam is called (A) Balanced beam (B) Under-reinforced beam (C) Over-reinforced beam (D) None of the above
Last Answer : Option C
Description : Diagonal tension in a beam (A) Is maximum at neutral axis (B) Decreases below the neutral axis and increases above the neutral axis (C) Increases below the neutral axis and decreases above the neutral axis (D) Remains same
Description : An increase in temperature on the top fibre of a simply supported beam will cause (a) Downward deflection (b) Upward deflection (c) No deflection (d) Angular rotation about neutral axis
Last Answer : Upward deflection
Description : In a reinforced concrete beam , the shear stress distribution above the neutral axis following a (a) A straight line (b) Circular curve (c) Parabolic curve (d) All the above
Last Answer : (c) Parabolic curve
Description : As the percentage of steel in a beam increases, the depth of neutral axis (a) Increases (b) Decreases (c) Equal to (d) None of these
Last Answer : (a) Increases
Description : 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.
Last Answer : (a) More than the permissible stress
Description : If the load on beam is increased, the tensile stress sin the concrete below the neutral axis will (a) Increase (b) Decrease (c) Remain unchanged (d) None of these
Last Answer : (a) Increase
Description : In case of a cantilever beam , the tensile zone is D. (a) Above the neutral axis (b) Below the neutralaxis (c) At the neutral axis (d) All the above
Last Answer : (a) Above the neutral axis
Description : 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
Last Answer : (b) Centre of tensile reinforcement
Description : In a simply supported reinforced concrete beam, the reinforcement is placed. (a) Above the neutral axis (b) Below the neutral axis (c) At the neutral axis (d) None of these
Last Answer : (b) Below the neutral axis
Description : Shear stress in a I-section beam is maximum art the (a) Outermost fiber (b) At the junction of web and flange (c) Central fiber (d) None
Last Answer : b) At the junction of web and flange
Description : In a beam, the neutral plane (A) May be its centre (B) Passes through the C.G. of the area of cross-section (C) Does not change during deformation (D) None of these
Last Answer : (C) Does not change during deformation