Define shear force and bending moment.

Define shear force and bending moment.
by

2 Answers

Answer :

Shear force: Shear force at any cross section of the beam is the algebraic sum of all vertical forces on the beam acting on right side or left side of the section is called as shear force. 

OR 

A shear force is the resultant vertical force acting on the either side of a section of a beam. 

Bending Moment: Bending moment at any section at any cross section is the algebraic sum of the moment of all forces acting on the right or left side of section is called as bending moment. 
by

Answer :

Shear force at a section defend as algebraic sum of taken only one side of section
 
Shear force at let section vertical of this (+ve) vertical down (-ve)
     Shear force at section of right
Section vertical down is (+ve) and vertical up is (-ve)
by

Related questions

If the positive and negative shear force diagram areas are not equal, it can be concluded that a.shear force diagram has been wrongly drawn b.there is at least one couple acting on the beam c.107 dynes d.there are at least two maxima for bending moment e.bending moment does not change sign

Description : If the positive and negative shear force diagram areas are not equal, it can be concluded that a.shear force diagram has been wrongly drawn b.there is at least one couple acting on the beam c.107 dynes d.there are at least two maxima for bending moment e.bending moment does not change sign

Last Answer : b. there is at least one couple acting on the beam

In the slope deflection equations, the deformations are considered to be caused by (i) Bending moment (ii) Shear force (iii) Axial force The correct answer is (A) Only (i) (B) (i) and (ii) (C) (ii) and (iii) (D) (i), (ii) and (iii)

Description : In the slope deflection equations, the deformations are considered to be caused by (i) Bending moment (ii) Shear force (iii) Axial force The correct answer is (A) Only (i) (B) (i) and (ii) (C) (ii) and (iii) (D) (i), (ii) and (iii)

Last Answer : (A) Only (i)

If the shear force along a section of a beam is zero, the bending moment at the section is (A) Zero (B) Maximum (C) Minimum (D) Average of maximum-minimum

Description : If the shear force along a section of a beam is zero, the bending moment at the section is  (A) Zero  (B) Maximum  (C) Minimum  (D) Average of maximum-minimum 

Last Answer : (B) Maximum 

An arch may be subjected to (A) Shear and axial force (B) Bending moment and shear force (C) Bending moment and axial force (D) Thrust, shear force and bending moment

Description : An arch may be subjected to  (A) Shear and axial force  (B) Bending moment and shear force  (C) Bending moment and axial force  (D) Thrust, shear force and bending moment 

Last Answer : (D) Thrust, shear force and bending moment 

A diagram which shows the variations of the axial load for all sections of the span of a beam, is called (A) Bending moment diagram (B) Shear force diagram (C) Thrust diagram (D) Stress diagram

Description : A diagram which shows the variations of the axial load for all sections of the span of a beam, is called (A) Bending moment diagram (B) Shear force diagram (C) Thrust diagram (D) Stress diagram

Last Answer : Answer: Option C

Pick up the correct statement from the following: (A) The rate of change of bending moment is equal to rate of shear force (B) The rate of change of shear force is equal to rate of loading (C) Neither (a) nor (b)(D) Both (a) and (b

Description : Pick up the correct statement from the following: (A) The rate of change of bending moment is equal to rate of shear force (B) The rate of change of shear force is equal to rate of loading (C) Neither (a) nor (b) (D) Both (a) and (b

Last Answer : (D) Both (a) and (b

If Z and I are the section modulus and moment of inertia of the section, the shear force F and bending moment M at a section are related by (A) F = My/I (B) F = M/Z (C) F = dM/dx (D) F Mdx

Description : If Z and I are the section modulus and moment of inertia of the section, the shear force F and bending moment M at a section are related by (A) F = My/I (B) F = M/Z (C) F = dM/dx (D) F Mdx

Last Answer : (C) F = dM/dx

If a three hinged parabolic arch carries a uniformly distributed load on its entire span, every section of the arch resists. (A) Compressive force (B) Tensile force (C) Shear force (D) Bending moment

Description : If a three hinged parabolic arch carries a uniformly distributed load on its entire span, every section of the arch resists. (A) Compressive force (B) Tensile force (C) Shear force (D) Bending moment

Last Answer : (A) Compressive force

In a combined footing for two columns carrying unequal loads, the maximum hogging bending moment occurs at (A) Less loaded column (B) More loaded column (C) A point of the maximum shear force (D) A point of zero shear force

Description : In a combined footing for two columns carrying unequal loads, the maximum hogging bending moment occurs at (A) Less loaded column (B) More loaded column (C) A point of the maximum shear force (D) A point of zero shear force

Last Answer : Answer: Option D

The amount of reinforcement for main bars in a slab, is based upon (A) Minimum bending moment (B) Maximum bending moment (C) Maximum shear force (D) Minimum shear force

Description : The amount of reinforcement for main bars in a slab, is based upon (A) Minimum bending moment (B) Maximum bending moment (C) Maximum shear force (D) Minimum shear force

Last Answer : Answer: Option B

In a beam the local bond stress Sb, is equal to (A) Shear force/(Leaver arm × Total perimeter of reinforcement) (B) Total perimeter of reinforcement/(Leaver arm × Shear force) (C) Leaver arm/(Shear force × Total perimeter of reinforcement) (D) Leaver arm/(Bending moment × Total perimeter of reinforcement)

Description : In a beam the local bond stress Sb, is equal to (A) Shear force/(Leaver arm Total perimeter of reinforcement) (B) Total perimeter of reinforcement/(Leaver arm Shear force) (C) ... force Total perimeter of reinforcement) (D) Leaver arm/(Bending moment Total perimeter of reinforcement)

Last Answer : Answer: Option A

A construction joint is provided where (A) Bending moment is small (B) Shear force is small (C) The member is supported by other member (D) All the above

Description : A construction joint is provided where (A) Bending moment is small (B) Shear force is small (C) The member is supported by other member (D) All the above

Last Answer : Answer: Option D

For a certain set of external loads, concordant profile in a prestressed beam represents to some scale the (a) Influence line diagram (b) Shear force diagram (c) Bending moment diagram (d) Williot-Mohr diagram

Description : For a certain set of external loads, concordant profile in a prestressed beam represents to some scale the (a) Influence line diagram (b) Shear force diagram (c) Bending moment diagram (d) Williot-Mohr diagram

Last Answer : (c) Bending moment diagram

In prestressed concrete members, the shear force depends upon (a) Distributed load (b) Torsion (c) Concentrated load (d) Variation in net bending moment

Description : In prestressed concrete members, the shear force depends upon (a) Distributed load (b) Torsion (c) Concentrated load (d) Variation in net bending moment

Last Answer : (d) Variation in net bending moment

The purlins in roof trusses are placed at the panel points essentially to avoid (a) Axial force in rafter (b) Shear force in rafter (c ) Deflection in rafter (d) Bending moment in rafter

Description : The purlins in roof trusses are placed at the panel points essentially to avoid (a) Axial force in rafter (b) Shear force in rafter (c ) Deflection in rafter (d) Bending moment in rafter

Last Answer : (d) Bending moment in rafter

The amount of reinforcement for main bars in a slab, is based upon (a) Maximum bending moment (b) Minimum bending moment (c) Maximum shear force (d) Minimum shear force

Description : The amount of reinforcement for main bars in a slab, is based upon (a) Maximum bending moment (b) Minimum bending moment (c) Maximum shear force (d) Minimum shear force

Last Answer : (a) Maximum bending moment

The deep beams are designed for (a) Shear force only (b) Bending moment only (c) Both S.F & B.M (d) Bearing

Description : The deep beams are designed for (a) Shear force only (b) Bending moment only (c) Both S.F & B.M (d) Bearing

Last Answer : (b) Bending moment only

A beam is designed on the basis of a. Maximum bending moment b. Minimum shear force. c.Maximum bending moment as well as for maximum shear force d. None.

Description : A beam is designed on the basis of a. Maximum bending moment b. Minimum shear force. c.Maximum bending moment as well as for maximum shear force d. None.

Last Answer : c.Maximum bending moment as well as for maximum shear force

Deflection due to shear force as compared to bending moment will be a.equal b.less c.More d.None.

Description : Deflection due to shear force as compared to bending moment will be a.equal b.less c.More d.None.

Last Answer : b.less

Relation between bending moment and shear force is (a) dM/dx = -Vx (b) dM/dx = ±Vx (c) dM/dx = Vx (d) None

Description : Relation between bending moment and shear force is (a) dM/dx = -Vx (b) dM/dx = ±Vx (c) dM/dx = Vx (d) None

Last Answer : (c) dM/dx = Vx

The graphical representation of variation of axial load on y axis and position of cross section along x axis is called as _____ (a) Bending moment diagram (b) Shear force diagram (c) Stress-strain diagram (d) Trust diagram

Description : The graphical representation of variation of axial load on y axis and position of cross section along x axis is called as _____ (a) Bending moment diagram (b) Shear force diagram (c) Stress-strain diagram (d) Trust diagram

Last Answer : (d) Trust diagram

The slope of shear force line at any section of the beam is also called (a) Bending moment at that section (b) Rate of loading at that section (c) Maximum Shear force (d) Maximum bending moment

Description : The slope of shear force line at any section of the beam is also called (a) Bending moment at that section (b) Rate of loading at that section (c) Maximum Shear force (d) Maximum bending moment

Last Answer : (b) Rate of loading at that section

Point of contra-flexure is also called (a) Point of maximum Shear force (b) Point of maximum Bending moment (c) Point of inflexion (d) Fixed end

Description : Point of contra-flexure is also called (a) Point of maximum Shear force (b) Point of maximum Bending moment (c) Point of inflexion (d) Fixed end

Last Answer : (c) Point of inflexion

Point of contra-flexure is a (a) Point where Shear force is maximum (b) Point where Bending moment is maximum (c) Point where Bending moment is zero (d) Point where Bending moment=0 but also changes sign from positive to negative

Description : Point of contra-flexure is a (a) Point where Shear force is maximum (b) Point where Bending moment is maximum (c) Point where Bending moment is zero (d) Point where Bending moment=0 but also changes sign from positive to negative

Last Answer : (d) Point where Bending moment=0 but also changes sign from positive to negative

In a cantilever subjected to a combination of concentrated load, uniformly distributed load and uniformly varying load, Maximum bending moment is (a) Where shear force=0 (b) At the free end (c) At the fixed end (d) At the mid-point

Description : In a cantilever subjected to a combination of concentrated load, uniformly distributed load and uniformly varying load, Maximum bending moment is (a) Where shear force=0 (b) At the free end (c) At the fixed end (d) At the mid-point

Last Answer : (c) At the fixed end

The rate of change of bending moment is equal to (a) Shear force (b) Slope (c) Deflection (d) None of these

Description : The rate of change of bending moment is equal to (a) Shear force (b) Slope (c) Deflection (d) None of these

Last Answer : (a) Shear force

A transmission shaft subjected to pure bending moment should be designed on the basis of (A) Maximum principal stress theory (B) Maximum shear stress theory (C) Distortion energy theory (D) Goodman or Soderberg diagrams

Description : A transmission shaft subjected to pure bending moment should be designed on the basis of (A) Maximum principal stress theory (B) Maximum shear stress theory (C) Distortion energy theory (D) Goodman or Soderberg diagrams

Last Answer : (A) Maximum principal stress theory

The bending moment ‘M’ and a torque ‘T’ is applied on a solid circular shaft. If the maximum bending stress equals to maximum shear stress developed, then ‘M’ is equal to (A) T/2 (B) T (C) 2 T (D) 4 T

Description : The bending moment ‘M’ and a torque ‘T’ is applied on a solid circular shaft. If the maximum bending stress equals to maximum shear stress developed, then ‘M’ is equal to (A) T/2 (B) T (C) 2 T (D) 4 T

Last Answer : (A) T/2

A shaft is subjected to bending moment M and a torque T simultaneously. The ratio of the maximum bending stress to maximum shear stress developed in the shaft, is (A) M/T (B) T/M (C) 2M/T (D) 2T/M

Description : A shaft is subjected to bending moment M and a torque T simultaneously. The ratio of the  maximum bending stress to maximum shear stress developed in the shaft, is  (A) M/T (B) T/M (C) 2M/T (D) 2T/M

Last Answer : (C) 2M/T

shaft subjected to a bending moment M and a torque T, experiences (A) Maximum bending stress = 32M d 3 (B) Maximum shear stress = 16 T d 3 (C) Both (a) and (b) (D) Neither (a) nor (b)

Description :  shaft subjected to a bending moment M and a torque T, experiences  (A) Maximum bending stress = 32M d 3 (B) Maximum shear stress = 16 T d 3 (C) Both (a) and (b)  (D) Neither (a) nor (b)

Last Answer : (C) Both (a) and (b) 

Pick up the incorrect statement from the following: Tensile reinforcement bars of a rectangular beam (A) Are curtailed if not required to resist the bending moment (B) Are bent up at suitable places to serve as shear reinforcement (C) Are bent down at suitable places to serve as shear reinforcement (D) Are maintained at bottom to provide at least local bond stress

Description : Pick up the incorrect statement from the following: Tensile reinforcement bars of a rectangular beam (A) Are curtailed if not required to resist the bending moment (B) Are bent up at suitable ... to serve as shear reinforcement (D) Are maintained at bottom to provide at least local bond stress

Last Answer : Answer: Option C

A beam curved in plan is designed for (A) Bending moment and shear (B) Bending moment and torsion (C) Shear and torsion (D) Bending moment, shear and torsion

Description : A beam curved in plan is designed for (A) Bending moment and shear (B) Bending moment and torsion (C) Shear and torsion (D) Bending moment, shear and torsion

Last Answer : Answer: Option D

Inc case of prestressed concrete members, the bursting stresses develop at (a) Bond zone (b) Maximum bending moment zone (c ) Maximum shear stress zone (d) Anchorage zone

Description : Inc case of prestressed concrete members, the bursting stresses develop at (a) Bond zone (b) Maximum bending moment zone (c ) Maximum shear stress zone (d) Anchorage zone

Last Answer : (d) Anchorage zone

Torque and bending moment of 100 kN.m and 200 kN.m acts on a shaft which has external diameter twice of internal diameter. What is the external diameter of the shaft which is subjected to a maximum shear stress of 90 N/mm2? a. 116.5 mm b. 233.025 mm c. 587.1 mm d. 900 mm

Description : Torque and bending moment of 100 kN.m and 200 kN.m acts on a shaft which has external diameter twice of internal diameter. What is the external diameter of the shaft which is subjected to a maximum shear stress of 90 N/mm2? a. 116.5 mm b. 233.025 mm c. 587.1 mm d. 900 mm

Last Answer : c. 587.1 mm

What is the maximum shear stress induced in a solid shaft of 50 mm diameter which is subjected to both bending moment and torque of 300 kN.mm and 200 kN.mm respectively? a. 9.11 N/mm2 b. 14.69 N/mm2 c. 16.22 N/mm2 d. 20.98 N/mm2

Description : What is the maximum shear stress induced in a solid shaft of 50 mm diameter which is subjected to both bending moment and torque of 300 kN.mm and 200 kN.mm respectively? a. 9.11 N/mm2 b. 14.69 N/mm2 c. 16.22 N/mm2 d. 20.98 N/mm2

Last Answer : b. 14.69 N/mm2

The ratio of maximum bending stress to maximum shear stress on the cross section when a shaft is simultaneously subjected to a torque T and bending moment M, a. T/M b. M/T c. 2T/M d. 2M/T

Description : The ratio of maximum bending stress to maximum shear stress on the cross section when a shaft is simultaneously subjected to a torque T and bending moment M, a. T/M b. M/T c. 2T/M d. 2M/T

Last Answer : d. 2M/T

A beam of uniform strength has a. same cross-section throughout the beam b. same bending stress at every section c. same bending moment at every section d. same shear stress at every section

Description : A beam of uniform strength has a. same cross-section throughout the beam b. same bending stress at every section c. same bending moment at every section d. same shear stress at every section

Last Answer : b. same bending stress at every section

Under sagging bending moment, the uppermost fiber of the beam is in (a) Shear (b) Compression (c) Tension (d) None)

Description : Under sagging bending moment, the uppermost fiber of the beam is in (a) Shear (b) Compression (c) Tension (d) None)

Last Answer : (b) Compression

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

When the helical extension spring is subjected to axial tensile 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 extension spring is subjected to axial tensile 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

For finding out the bending moment for the arm (spoke) of flywheel the arm is assumed as 1. a cantilever beam fixed at the rim and subjected to tangential force at the hub 2. a simply supported beam fixed at hub and rim and carrying uniformly distributed load 3. a cantilever hub fixed at the rim and subjected to tangential force at the rim 4. a fixed beam fixed at hub and rim and carrying uniformly distributed load

Description : For finding out the bending moment for the arm (spoke) of flywheel the arm is assumed as 1. a cantilever beam fixed at the rim and subjected to tangential force at the hub 2. a simply ... tangential force at the rim 4. a fixed beam fixed at hub and rim and carrying uniformly distributed load

Last Answer : 3. a cantilever hub fixed at the rim and subjected to tangential force at the rim

For finding out the bending moment for the arm (spoke) of flywheel, the arm is assumed as, (A) A cantilever beam fixed at the rim and subjected to tangential force at the hub (B) A simply supported beam fixed at hub and rim and carrying uniformly distributed load (C) A cantilever beam fixed at the hub and subjected to tangential force at the rim (D) A fixed beam fixed at hub and rim and carrying uniformly distributed load

Description : For finding out the bending moment for the arm (spoke) of flywheel, the arm is assumed as, (A) A cantilever beam fixed at the rim and subjected to tangential force at the hub (B) A simply ... tangential force at the rim (D) A fixed beam fixed at hub and rim and carrying uniformly distributed load

Last Answer : (C) A cantilever beam fixed at the hub and subjected to tangential force at the rim

The bending moment is maximum on a section where shearing force (A) Is maximum (B) Is minimum (C) Is equal (D) Changes sign

Description : The bending moment is maximum on a section where shearing force  (A) Is maximum  (B) Is minimum  (C) Is equal  (D) Changes sign 

Last Answer : (D) Changes sign 

In a loaded beam, the point of contraflexure occurs at a section where (A) Bending moment is minimum (B) Bending moment is zero or changes sign (C) Bending moment is maximum (D) Shearing force is maximum

Description : In a loaded beam, the point of contraflexure occurs at a section where (A) Bending moment is minimum (B) Bending moment is zero or changes sign (C) Bending moment is maximum (D) Shearing force is maximum

Last Answer : Answer: Option B

is the pre-stressed force applied to the tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is . The maximum stress in the beam, subjected to a maximum bending moment , is (A) f = (P/A) + (Z/M) (B) f = (A/P) + (M/Z) (C) f = (P/A) + (M/Z) (D) f = (P/A) + (M/6Z)

Description : is the pre-stressed force applied to the tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is . The maximum stress in the beam, subjected to a maximum bending moment , is (A) f = (P/A) + (Z/M) ... ) + (M/Z) (C) f = (P/A) + (M/Z) (D) f = (P/A) + (M/6Z)

Last Answer : Answer: Option C

is the pre-stressed force applied to tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is . The minimum stress on the beam subjected to a maximum bending moment is (A) f = (P/A) - (Z/M) (B) f = (A/P) - (M/Z) (C) f = (P/A) - (M/Z) (D) f = (P/A) - (M/6Z)

Description : is the pre-stressed force applied to tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is . The minimum stress on the beam subjected to a maximum bending moment is (A) f = (P/A) - (Z/M) (B) f = (A/P) - (M/Z) (C) f = (P/A) - (M/Z) (D) f = (P/A) - (M/6Z)

Last Answer : Answer: Option C

Pick up the correct statement from the following: (A) The bent up bars at a support resist the negative bending moment (B) The bent up bars at a support resist the sharing force (C) The bending of bars near supports is generally at 45° (D) All the above

Description : Pick up the correct statement from the following: (A) The bent up bars at a support resist the negative bending moment (B) The bent up bars at a support resist the sharing force (C) The bending of bars near supports is generally at 45° (D) All the above

Last Answer : (D) All the above

The expression EI d4y/dx4 at a section of a member represents a. Shearing force b. rate of loading c. bending moment d.slope.

Description : The expression EI d4y/dx4 at a section of a member represents a. Shearing force b. rate of loading c. bending moment d.slope.

Last Answer : b. rate of loading

.The expression EI d3y/dx3 at a section of a member represents a.Shearing force b.rate of loading c.bending moment d.slope.

Description : .The expression EI d3y/dx3 at a section of a member represents a.Shearing force b.rate of loading c.bending moment d.slope.

Last Answer : a.Shearing force