The intensity of direct longitudinal stress in the cross-section at any point distant r from the neutral axis, is proportional to (A) r (B) 1/r (C) r2 (D) 1/r²

The intensity of direct longitudinal stress in the cross-section at any point distant r from the
neutral axis, is proportional to
(A) r
(B) 1/r
(C) r2
(D) 1/r²
by

1 Answer

Answer :

(A) r
by

Related questions

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

The area of the cross-section of a road fully in banking shown in the given figure, is (A) [sb² + r² (2bd + sd)²]/(r² - s²) (B) [sb² + r² (2bd + sd)²]/(r² - s5 ) (C) [sb² + r² (2bd + sd)²]/(r - s) (D) None of these

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Last Answer : (A) [sb² + r² (2bd + sd)²]/(r² - s²)

In case of a beam subjected to pure bending a.107 dynes b.the stress intensity in any fibre is proportional to the distance of the fibre from the neutral axis c.the stress intensity in any fibre is proportional to the distance of the fibre from the load carrying end d.the stress intensity in any fibre is uniform e.the nature of stress in any fibre is identical

Description : In case of a beam subjected to pure bending a.107 dynes b.the stress intensity in any fibre is proportional to the distance of the fibre from the neutral axis c.the stress intensity in any fibre is ... d.the stress intensity in any fibre is uniform e.the nature of stress in any fibre is identical

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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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In a shaft shear stress intensity at a point is not (A) Directly proportional to the distance from the axis (B) Inversely proportional to the distance from the axis (C) Inversely proportional to the polar moment of inertia (D) Directly proportional to the applied torque

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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

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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

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Last Answer : (B) Depth of the neutral axis 

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

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A beam is said to be of uniform strength, if (A) B.M. is same throughout the beam (B) Shear stress is same throughout the beam (C) Deflection is same throughout the beam (D) Bending stress is same at every section along its longitudinal axis

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If At is the area of steel cross-section, t is working stress, L is width of road and W is weight of slab per square metre, the spacing of the tie bars for a longitudinal joint, is (A) (100 At × t)/WL (B) 100 At/tWL (C) (100 WAt × t)/tL (D) 100 WL/At t

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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

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Pick up the correct statement from the following: (A) The bending stress in a section is zero at its neutral axis and maximum at the outer fibres (B) The shear stress is zero at the outer fibres and maximum at the neutral axis (C) The bending stress at the outer fibres, is known as principal stress (D) All the above

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Last Answer : (D) All the above 

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

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For a reinforced concrete section, the shape of shear stress diagram is (A) Wholly parabolic (B) Wholly rectangular (C) Parabolic above neutral axis and rectangular below neutral axis (D) Rectangular above neutral axis and parabolic below neutral axis

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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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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.

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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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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

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In case of laminar flow of fluid through a circular pipe, the (A) Shear stress over the cross-section is proportional to the distance from the surface of the pipe (B) Surface of velocity distribution is a paraboloid of revolution, whose volume equals half the volume of circumscribing cylinder (C) Velocity profile varies hyperbolically and the shear stress remains constant over the cross-section (D) Average flow occurs at a radial distance of 0.5 r from the centre of the pipe (r = pipe radius)

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Last Answer : (B) Surface of velocity distribution is a paraboloid of revolution, whose volume equals half the volume of circumscribing cylinder

If Ac , Asc and A are areas of concrete, longitudinal steel and section of a R.C.C. column and m and c are the modular ratio and maximum stress in the configuration of concrete, the strength of column is (A) cAc + m cAsc (B) c (A - Asc) + m cAsc (C) c [A + (m - 1)ASC] (D) All the above

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Last Answer : Answer: Option D

In a simple bending theory, one of the assumption is that the plane sections before bending remain plane after bending. This assumption means that a. stress is uniform throughout the beam b. strain is uniform throughout the beam c. stress is proportional to the distance from the neutral axis d. strain is proportional to the distance from the neutral axis

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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

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Last Answer : Answer: Option B

The yield moment of a cross section is defined as the moment that will just produce the yield stress in (A) The outer most fibre of the section (B) The inner most fibre of the section (C) The neutral fibre of the section (D) The fibre everywhere

Description : The yield moment of a cross section is defined as the moment that will just produce the yield  stress in  (A) The outer most fibre of the section  (B) The inner most fibre of the section  (C) The neutral fibre of the section  (D) The fibre everywhere 

Last Answer : (A) The outer most fibre of the section 

An R.C.C. beam of 25 cm width and 50 cm effective depth has a clear span of 6 metres and carries a U.D.L. of 3000 kg/m inclusive of its self weight. If the lever arm constant for the section is 0.865, the maximum intensity of shear stress, is (A) 8.3 kg/cm2 (B) 7.6 kg/cm2 (C) 21.5 kg/cm2 (D) 11.4 kg/cm2

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Last Answer : Answer: Option A

The section modulus of a rectangular light beam 25 metres long is 12.500 cm3 . The beam is simply supported at its ends and carries a longitudinal axial tensile load of 10 tonnes in addition to a point load of 4 tonnes at the centre. The maximum stress in the bottom most fibre at the mid span section, is (A) 13.33 kg/cm2 tensile (B) 13.33 kg/cm2 compressive (C) 26.67 kg/cm2 tensile (D) 26.67 kg/cm2 compressive

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Last Answer : (C) 26.67 kg/cm2 tensile

In case of an eccentric loading on a bracket subjected to moment M, the tangential force developed in any rivet, at right angles to its radius vector r is (A) Mr/ r² (B) r²/Mr(C) Mr²/ r² (D) Mr/ r²

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Last Answer : (A) Mr/ r² 

If the ratio of long and short spans of a two way slab with corners held down is r, the actual reduction of B.M. is given by (A) (5/6) (r/1 + r²) M (B) (5/6) (r²/1 + r²) M (C) (5/6) (r²/1 + r3 ) M (D) (5/6) (r²/1 + r4 ) M

Description : If the ratio of long and short spans of a two way slab with corners held down is r, the actual reduction of B.M. is given by (A) (5/6) (r/1 + r²) M (B) (5/6) (r²/1 + r²) M (C) (5/6) (r²/1 + r3 ) M (D) (5/6) (r²/1 + r4 ) M

Last Answer : Answer: Option D

If T and R are the tread and rise of a stair which carries a load w per square metre on slope, the corresponding load per square metre of the horizontal area, is (A) w (R + T)/T (B) w (R² + T²)/T (C) w (R + T)/T (D) w (R/T)

Description : If T and R are the tread and rise of a stair which carries a load w per square metre on slope, the corresponding load per square metre of the horizontal area, is (A) w (R + T)/T (B) w (R² + T²)/T (C) w (R + T)/T (D) w (R/T)

Last Answer : Answer: Option B

Maximum shear stress in a triangular section ABC of height H and base B occurs at _________ a. H b. H/2 c. H/3 d. neutral axis

Description : Maximum shear stress in a triangular section ABC of height H and base B occurs at _________ a. H b. H/2 c. H/3 d. neutral axis

Last Answer : b. H/2

What is the shear stress acting along the neutral axis, over a triangular section? a. 2.66 (S/bh) b. 1.5 (S/bh) c. 0.375 (S/bh) d. None of the above

Description : What is the shear stress acting along the neutral axis, over a triangular section? a. 2.66 (S/bh) b. 1.5 (S/bh) c. 0.375 (S/bh) d. None of the above

Last Answer : a. 2.66 (S/bh)

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

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

The stress in the wall of a cylinder in a direction normal to its longitudinal axis, due to a force acting along the circumference, is known as (A) Yield stress(B) Longitudinal stress (C) Hoop stress (D) Circumferential stress

Description : The stress in the wall of a cylinder in a direction normal to its longitudinal axis, due to a force  acting along the circumference, is known as  (A) Yield stress  (B) Longitudinal stress  (C) Hoop stress  (D) Circumferential stress 

Last Answer : (C) Hoop stress

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

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

Last Answer : Answer: Option C

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

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

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 entire section of the beam becomes fully plastic, is called plastic moment (C) In a fully plastic stage of the beam, the neutral axis divides the section in two sections of equal area (D) All the above

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 

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

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

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

Description : 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

Last Answer : (c) Either (a) or (b)

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

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

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

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

The neutral axis of a balanced section is called (a) Balanced neutral axis (b) Critical neutral axis (c) Equivalent neutral axis (d) All of these

Description : The neutral axis of a balanced section is called (a) Balanced neutral axis (b) Critical neutral axis (c) Equivalent neutral axis (d) All of these

Last Answer : (b) Critical neutral axis

The actual neutral axis of n under reinforced section is above the critical neutral axis of a balanced section (a) Correct (b) Incorrect (c) Not known (d) None of these

Description : The actual neutral axis of n under reinforced section is above the critical neutral axis of a balanced section (a) Correct (b) Incorrect (c) Not known (d) None of these

Last Answer : (a) Correct

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

The neutral axis corresponding to balanced section condition is termed as [ A ] Critical neutral axis [ B ] Centroidal neutral axis [ C ] Balanced neutral axis [ D ] All the above

Description : The neutral axis corresponding to balanced section condition is termed as [ A ] Critical neutral axis [ B ] Centroidal neutral axis [ C ] Balanced neutral axis [ D ] All the above

Last Answer : [ A ] Critical neutral axis

One of the Lehmann's rules of plane tabling, is (A) Location of the instrument station is always distant from each of the three rays from the known points in proportion to their distances (B) When looking in the direction of each of the given points, the instrument station will be on the right side of one and left side of the other ray (C) When the instrument station is outside the circumscribing circle its location is always on the opposite side of the ray to the most distant point as the inter-section of the other two rays (D) None of these

Description : One of the Lehmann's rules of plane tabling, is  (A) Location of the instrument station is always distant from each of the three rays from the  known points in proportion to their distances  ( ... to the most distant point as the inter-section of the other two rays  (D) None of these 

Last Answer : (A) Location of the instrument station is always distant from each of the three rays from the  known points in proportion to their distances 

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

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