The centroid of compressive force, from the extreme compression fiber, in limit state design lies at a distance of (A) 0.367 xu (B) 0.416 xu (C) 0.446 xu (D) 0.573 xu Where xu is the depth of neutral axis at the limit state of collapse

The centroid of compressive force, from the extreme compression fiber, in limit state design lies at
a distance of
(A) 0.367 xu (B) 0.416 xu
(C) 0.446 xu
(D) 0.573 xu Where xu is the depth of neutral axis at the limit state of collapse
by

1 Answer

Answer :

Answer: Option B
by

Related questions

In limit state design of concrete for flexure, the area of stress block is taken as (a) 0.530 fck. Xu (b) 0.446 fck . Xu ( c) 0.420 fck .Xu (d) 0.360 fck . Xu Where fck is characteristic compressive strength of concrete and Xu is the depth of neutral axis from top.

Description : In limit state design of concrete for flexure, the area of stress block is taken as (a) 0.530 fck. Xu (b) 0.446 fck . Xu ( c) 0.420 fck .Xu (d) 0.360 fck . Xu Where fck is characteristic compressive strength of concrete and Xu is the depth of neutral axis from top.

Last Answer : (d) 0.360 fck . Xu

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

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 

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

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

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 /2) (d - n/3) (B) Atft (d - n/3) (C) ½ n1 (1 - n1/3) cbd² (D) All the above

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

Last Answer : Answer: Option D

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

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

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

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

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

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

Regarding the working stress design of under reinforced concrete section, (a) The neutral axis depth will be greater than that of a balanced section. (b) The stress in steel intension will reach its maximum permissible value first. (c) The moment of resistance will be less than that of the balanced section. (d) The concrete on the tension side is also be considered for calculating the moment of resistance of the section.

Description : Regarding the working stress design of under reinforced concrete section, (a) The neutral axis depth will be greater than that of a balanced section. (b) The stress in steel intension will reach ... on the tension side is also be considered for calculating the moment of resistance of the section.

Last Answer : both b&c

If is the shear force at a section of an I-joist, having web depth and moment of inertia about its neutral axis, the difference between the maximum and mean shear stresses in the web is, (A) Sd²/8I (B) Sd²/12I (C) Sd²/16I(D) Sd²/24I

Description : If is the shear force at a section of an I-joist, having web depth and moment of inertia about its neutral axis, the difference between the maximum and mean shear stresses in the web is, (A) Sd²/8I (B) Sd²/12I (C) Sd²/16I (D) Sd²/24I

Last Answer : (D) Sd²/24I

Neutral axis of a beam always coincides with a. Axis passing through bottom of beam b. Axis passing through height h/2 from bottom c. Axis passing through height h/3 from bottom d. Axis passing through centroid

Description : Neutral axis of a beam always coincides with a. Axis passing through bottom of beam b. Axis passing through height h/2 from bottom c. Axis passing through height h/3 from bottom d. Axis passing through centroid

Last Answer : d. Axis passing through centroid

On the sea shore structures, the water wave impact causes (A) Direct compressive force due to its horizontal component (B) Shear force due to deflected vertical force (C) Compressive force due to collapse of the wave (D) All of the above

Description : On the sea shore structures, the water wave impact causes (A) Direct compressive force due to its horizontal component (B) Shear force due to deflected vertical force (C) Compressive force due to collapse of the wave (D) All of the above

Last Answer : (D) All of the above

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

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

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 (C) Distance of the C.G. of the area from its neutral axis (D) Moment of the beam section about its neutral axis

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

Last Answer : Answer: Option D

A sphere of radius r is cut from larger sphere of radius R. The distance between their centre is a. The centroid of the remaining valoume lies on the line of centres and the sistanc from the centre of the larger sphere is a.ar2 / (R2 - r2) b.107 dynes c.aR/(R2-r2) d.aR/(R - r) e.ar3 / (R3 - r3)

Description : A sphere of radius r is cut from larger sphere of radius R. The distance between their centre is a. The centroid of the remaining valoume lies on the line of centres and the sistanc from the centre of the larger sphere is a.ar2 / (R2 - r2) b.107 dynes c.aR/(R2-r2) d.aR/(R - r) e.ar3 / (R3 - r3)

Last Answer : e. ar3 / (R3 - r3)

If the permissible stress in steel in tension is 140 N/mm², then the depth of neutral axis for a singly reinforced rectangular balanced section will be (A) 0.35 d (B) 0.40 d (C) 0.45 d (D) Dependent on grade of concrete also

Description : If the permissible stress in steel in tension is 140 N/mm², then the depth of neutral axis for a singly reinforced rectangular balanced section will be (A) 0.35 d (B) 0.40 d (C) 0.45 d (D) Dependent on grade of concrete also

Last Answer : Answer: Option B

If M, I, R, E, F, and Y are the bending moment, moment of inertia, radius of curvature, modulus of elasticity stress and the depth of the neutral axis at section, then (A) M/I = R/E = F/Y (B) I/M = R/E = F/Y (C) M/I = E/R = E/Y (D) M/I = E/R = Y/F

Description : If M, I, R, E, F, and Y are the bending moment, moment of inertia, radius of curvature, modulus of  elasticity stress and the depth of the neutral axis at section, then  (A) M/I = R/E = F/Y (B) I/M = R/E = F/Y (C) M/I = E/R = E/Y (D) M/I = E/R = Y/F

Last Answer : (C) M/I = E/R = E/Y

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 : 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

Last Answer : Answer: Option D

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

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

Last Answer : Answer: Option A

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 : 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)

Last Answer : Answer: Option D

As the percentage of steel increases (A) Depth of neutral axis decreases (B) Depth of neutral axis increases (C) Lever arm increases (D) Lever arm decreases

Description : As the percentage of steel increases (A) Depth of neutral axis decreases (B) Depth of neutral axis increases (C) Lever arm increases (D) Lever arm decreases

Last Answer : Answer: Option B

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 : 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

Last Answer : Answer: Option C

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 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

Last Answer : Answer: Option B

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

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

Last Answer : Answer: Option D

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 : 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

Last Answer : Answer: Option C

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

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

The position of the neutral axis in reinforced brick masonry is independent of the loading and is at a depth of

Description : The position of the neutral axis in reinforced brick masonry is independent of the loading and is at a depth of

Last Answer : (a) One-third of the effective depth

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

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

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

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

If the depth of actual neutral axis is greater than the depth of critical neutral axis, then [ A ] Concrete attains its permissible stress earlier [ B ] Steel attains its permissible stress earlier [ C ] Both concrete and steel reaches its permissible stresses simultaneously [ D ] None of the above

Description : If the depth of actual neutral axis is greater than the depth of critical neutral axis, then [ A ] Concrete attains its permissible stress earlier [ B ] Steel attains its permissible stress earlier [ C ] Both concrete and steel reaches its permissible stresses simultaneously [ D ] None of the above

Last Answer : [ A ] Concrete attains its permissible stress earlier

The depth of neutral axis for a balanced section is --------- the depth of critical neutral axis [ A ] equal [ B ] always greater than [ C ] always less than [ D ] may be sometimes greater than

Description : The depth of neutral axis for a balanced section is --------- the depth of critical neutral axis [ A ] equal [ B ] always greater than [ C ] always less than [ D ] may be sometimes greater than

Last Answer : [ A ] equal

The depth of neutral axis for over reinforced section is ----------- the depth of critical neutral axis [ A ] Equal to [ B ] Greater than [ C ] Less than [ D ] None of the above

Description : The depth of neutral axis for over reinforced section is ----------- the depth of critical neutral axis [ A ] Equal to [ B ] Greater than [ C ] Less than [ D ] None of the above

Last Answer : [ B ] Greater than

The depth of neutral axis for under reinforced section is --------- the depth of critical neutral axis [ A ] Equal to [ B ] Greater than [ C ] Less than [ D ] None of the above

Description : The depth of neutral axis for under reinforced section is --------- the depth of critical neutral axis [ A ] Equal to [ B ] Greater than [ C ] Less than [ D ] None of the above

Last Answer : [ C ] Less than

As the percentage of steel increases [ A ] Depth of neutral axis decreases [ B ] Depth of neutral axis increases [ C ] Lever arm increases [ D ] None of the above are correct

Description : As the percentage of steel increases [ A ] Depth of neutral axis decreases [ B ] Depth of neutral axis increases [ C ] Lever arm increases [ D ] None of the above are correct

Last Answer : [ B ] Depth of neutral axis increases

Pick up the correct statement from the following: (A) For channels, the shear centre does not coincide its centroid (B) The point of intersection of the bending axis with the cross section of the beam, is called shear centre (C) For I sections, the shear centre coincides with the centroid of the cross section of the beam (D) All the above

Description : Pick up the correct statement from the following:  (A) For channels, the shear centre does not coincide its centroid  (B) The point of intersection of the bending axis with the cross section ... shear centre coincides with the centroid of the cross section of the beam  (D) All the above

Last Answer : (D) All the above

Working stress method of design results in -------------- percentages of compression steel than that of a limit state method of design [ A ] Equal [ B ] Larger [ C ] Smaller [ D ] Half of the

Description : Working stress method of design results in -------------- percentages of compression steel than that of a limit state method of design [ A ] Equal [ B ] Larger [ C ] Smaller [ D ] Half of the

Last Answer : [ B ] Larger

If is the sectional area of a pre-stressed rectangular beam provided with a tendon pre-stressed by a force through its centroidal longitudinal axis, the compressive stress in concrete, is (A) P/A (B) A/P (C) P/2A (D) 2A/P

Description : If is the sectional area of a pre-stressed rectangular beam provided with a tendon pre-stressed by a force through its centroidal longitudinal axis, the compressive stress in concrete, is (A) P/A (B) A/P (C) P/2A (D) 2A/P

Last Answer : Answer: Option A

Though the effective depth of a T-beam is the distance between the top compression edge to the centre of the tensile reinforcement, for heavy loads, it is taken as (A) 1/8th of the span (B) 1/10th of the span (C) 1/12th of the span (D) 1/16th of the span

Description : Though the effective depth of a T-beam is the distance between the top compression edge to the centre of the tensile reinforcement, for heavy loads, it is taken as (A) 1/8th of the span (B) 1/10th of the span (C) 1/12th of the span (D) 1/16th of the span

Last Answer : Answer: Option C

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.

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.

In limit state approach, spacing of main reinforcement controls primarily (a) Cracking (b) Deflection (c ) Durability (d) Collapse

Description : In limit state approach, spacing of main reinforcement controls primarily (a) Cracking (b) Deflection (c ) Durability (d) Collapse

Last Answer : (a) Cracking

Limit state of collapse deals with [ A ] strength and stability of the structure [ B ] conditions such as deflection, cracking [ C ] durability [ D ] all the above

Description : Limit state of collapse deals with [ A ] strength and stability of the structure [ B ] conditions such as deflection, cracking [ C ] durability [ D ] all the above

Last Answer : [ A ] strength and stability of the structure

Limit state of collapse deals with [ A ] strength and stability of the structure [ B ] conditions such as deflection, cracking [ C ] durability [ D ] all the above

Description : Limit state of collapse deals with [ A ] strength and stability of the structure [ B ] conditions such as deflection, cracking [ C ] durability [ D ] all the above

Last Answer : [ A ] strength and stability of the structure

The maximum magnitude of shear stress due to shear force F on a rectangular section of area A at the neutral axis, is (A) F/A (B) F/2A (C) 3F/2A (D) 2F/3A

Description : The maximum magnitude of shear stress due to shear force F on a rectangular section of area A at  the neutral axis, is  (A) F/A (B) F/2A (C) 3F/2A (D) 2F/3A

Last Answer : (C) 3F/2A

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

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

Centre of pressure of a plane surface of arbitrary shape immersed vertically in a static mass of fluid(A) Lies above the centroid of the plane surface(B) Is independent of the specific weight of the fluid(C) Is different for different fluids(D) Is at the centroid of the plane surface

Description : Centre of pressure of a plane surface of arbitrary shape immersed vertically in a static mass of fluid (A) Lies above the centroid of the plane surface (B) Is independent of the specific weight of the fluid (C) Is different for different fluids (D) Is at the centroid of the plane surface

Last Answer : (B) Is independent of the specific weight of the fluid

If is the length of a sub-chord and is the radius of simple curve, the angle of deflection between its tangent and sub-chord, in minutes, is equal to (A) 573 S/R (B) 573 R/S (C) 1718.9 R/S (D) 1718.9 S/R

Description : If is the length of a sub-chord and is the radius of simple curve, the angle of deflection  between its tangent and sub-chord, in minutes, is equal to  (A) 573 S/R (B) 573 R/S (C) 1718.9 R/S (D) 1718.9 S/R

Last Answer : (D) 1718.9 S/R

When the helical compression spring is subjected to axial compressive force, the type of stress induced in the spring wire is, (A) Tensile stress (B) Compressive stress (C) Bending stress (D) Torsional shear stress

Description : When the helical compression spring is subjected to axial compressive force, the type of stress induced in the spring wire is, (A) Tensile stress (B) Compressive stress (C) Bending stress (D) Torsional shear stress

Last Answer : (D) Torsional shear stress

The line of action of the buoyant force acts through the (A) Centroid of the volume of fluid vertically above the body (B) Centre of the volume of floating body (C) Center of gravity of any submerged body (D) Centroid of the displaced volume of fluid

Description : The line of action of the buoyant force acts through the (A) Centroid of the volume of fluid vertically above the body (B) Centre of the volume of floating body (C) Center of gravity of any submerged body (D) Centroid of the displaced volume of fluid

Last Answer : Answer: Option D

The line of action of the buoyant force acts through the Centroid of the (A) Submerged body (B) Volume of the floating body (C) Volume of the fluid vertically above the body (D) Displaced volume of the fluid

Description : The line of action of the buoyant force acts through the Centroid of the (A) Submerged body (B) Volume of the floating body (C) Volume of the fluid vertically above the body (D) Displaced volume of the fluid

Last Answer : Answer: Option D

The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the Centroid, if (A) The area is horizontal (B) The area is vertical (C) The area is inclined (D) All of the above

Description : The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the Centroid, if (A) The area is horizontal (B) The area is vertical (C) The area is inclined (D) All of the above

Last Answer : Answer: Option D

The slenderness ratio of a vertical column of a square cross-section of 2.5 cm sides and 300 cm length, is (A) 200 (B) 240 (C) 360 (D) 416

Description : The slenderness ratio of a vertical column of a square cross-section of 2.5 cm sides and 300 cm  length, is  (A) 200  (B) 240  (C) 360  (D) 416

Last Answer : (D) 416