The point of contraflexure is the point where (A) B.M. changes sign (B) B.M. is maximum (C) B.M. is minimum (D) S.F. is zero

The point of contraflexure is the point where 

(A) B.M. changes sign 

(B) B.M. is maximum 

(C) B.M. is minimum 

(D) S.F. is zero 

by

1 Answer

Answer :

(A) B.M. changes sign 

by

Related questions

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

At the point of contraflexure (a) B.M is mimimum (b) B.M is maximum (c) B.M is either zero or changes sign (d) None of these

Description : At the point of contraflexure (a) B.M is mimimum (b) B.M is maximum (c) B.M is either zero or changes sign (d) None of these

Last Answer : c) B.M is either zero or changes sign

In a continuous bending moment curve the point where it changes sign, is called (A) Point of inflexion (B) Point of contraflexure (C) Point of virtual hinge (D) All the above

Description : In a continuous bending moment curve the point where it changes sign, is called (A) Point of inflexion (B) Point of contraflexure (C) Point of virtual hinge (D) All the above

Last Answer : (D) All the above

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 

The point of contraflexure occurs in (A) Cantilever beams only (B) Continuous beams only (C) Over hanging beams only (D) All types of beams

Description : The point of contraflexure occurs in (A) Cantilever beams only (B) Continuous beams only (C) Over hanging beams only (D) All types of beams

Last Answer : (C) Over hanging beams only

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

The number of points of contraflexure in a simple supported beam carrying uniformly distributed load, is (A) 0 (B) 1 (C) 2 (D) 3

Description : The number of points of contraflexure in a simple supported beam carrying uniformly distributed load, is (A) 0 (B) 1 (C) 2 (D) 3

Last Answer : (A) 0

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

For a fixed beam with UDL,point of contraflexure is a.0.211L or 0.789L b. 0.365 L or 0.635 L c. 0.177 L or 0.823 L d.0.477 L or 0.523 L

Description : For a fixed beam with UDL,point of contraflexure is a.0.211L or 0.789L b. 0.365 L or 0.635 L c. 0.177 L or 0.823 L d.0.477 L or 0.523 L

Last Answer : a.0.211L or 0.789L

.For a fixed beam with midpoint load point of contraflexure occurs at a. L/4 b. L/2 c. L/6 d. L/8

Description : .For a fixed beam with midpoint load point of contraflexure occurs at a. L/4 b. L/2 c. L/6 d. L/8

Last Answer : a. L/4

In a simply supported beam carrying a uniformly distributed load over the left half span, the point of contraflexure will occur in (a) Left half span of the beam (b) Right half span of the beam. (c) Quarter points of the beam (d) Does not exist

Description : In a simply supported beam carrying a uniformly distributed load over the left half span, the point of contraflexure will occur in (a) Left half span of the beam (b) Right half span of the beam. (c) Quarter points of the beam (d) Does not exist

Last Answer : (d) Does not exist

The Point of contraflexure occurs in case of (a) Cantilever beams (b) Simply supported beams (c) Over hanging beams (d) All types of beams

Description : The Point of contraflexure occurs in case of (a) Cantilever beams (b) Simply supported beams (c) Over hanging beams (d) All types of beams

Last Answer : c) Over hanging beams

If a three hinged parabolic arch, (span l, rise h) is carrying a uniformly distributed load w/unit length over the entire span, (A) Horizontal thrust is wl2 /8h (B) S.F. will be zero throughout (C) B.M. will be zero throughout (D) All the above

Description : If a three hinged parabolic arch, (span l, rise h) is carrying a uniformly distributed load w/unit  length over the entire span,  (A) Horizontal thrust is wl2 /8h (B) S.F. will be zero throughout  (C) B.M. will be zero throughout  (D) All the above 

Last Answer : (D) All the above 

If a suspended body is struck at the centre of percussion, then the pressure on die axis passing through the point of suspension will be (A) Maximum (B) Minimum (C) Zero (D) Infinity

Description : If a suspended body is struck at the centre of percussion, then the pressure on die axis passing through the point of suspension will be (A) Maximum (B) Minimum (C) Zero (D) Infinity

Last Answer : (C) Zero

A simply supported beam (l + 2a) with equal overhangs (a) carries a uniformly distributed load over the whole length, the B.M. changes sign if (A) l > 2a (B) l < 2a (C) l = 2a (D) l = 4a

Description : A simply supported beam (l + 2a) with equal overhangs (a) carries a uniformly distributed load  over the whole length, the B.M. changes sign if  (A) l > 2a (B) l < 2a (C) l = 2a (D) l = 4a

Last Answer : (A) l > 2a

Explain the difference between the points of inflexion and contraflexure.

Description : Explain the difference between the points of inflexion and contraflexure.

Last Answer : At points of inflexion in a loaded beam the bending moment is zero and at points of contraflexure in loaded beam the bending moment changes sign from increasing to decreasing.

In a shaft rotated by a couple, the shear force varies (A) From zero at the centre to a maximum at the circumference (B) From minimum at the centre of maximum at the circumference (C) From maximum at the centre to zero at the circumference (D) Equally throughout the section

Description : In a shaft rotated by a couple, the shear force varies (A) From zero at the centre to a maximum at the circumference (B) From minimum at the centre of maximum at the circumference (C) From maximum at the centre to zero at the circumference (D) Equally throughout the section

Last Answer : (A) From zero at the centre to a maximum at the circumference

If the stress produced by a prismatic bar is equal to the working stress, the area of the cross￾section of the prismatic bar, becomes (A) Zero (B) Infinite (C) Maximum (D) Minimum

Description : If the stress produced by a prismatic bar is equal to the working stress, the area of the cross￾section of the prismatic bar, becomes  (A) Zero  (B) Infinite  (C) Maximum  (D) Minimum

Last Answer : (B) Infinite 

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 

In a free vortex motion, the radial component of velocity everywhere is (A) Maximum (B) Minimum(C) Zero (D) Nonzero and finite

Description : In a free vortex motion, the radial component of velocity everywhere is (A) Maximum (B) Minimum (C) Zero (D) Nonzero and finite

Last Answer : Answer: Option C

At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be (A) Minimum (B) Maximum (C) Zero (D) Could be any value

Description : At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be (A) Minimum (B) Maximum (C) Zero (D) Could be any value

Last Answer : Answer: Option D

When a liquid is flowing through a pipe, the velocity of the liquid is (A) Maximum at the centre and minimum near the walls (B) Minimum at the centre and maximum near the walls (C) Zero at the centre and maximum near the walls (D) Maximum at the centre and zero near the walls

Description : When a liquid is flowing through a pipe, the velocity of the liquid is (A) Maximum at the centre and minimum near the walls (B) Minimum at the centre and maximum near the walls (C) Zero at the centre and maximum near the walls (D) Maximum at the centre and zero near the walls

Last Answer : Answer: Option A

The discharge in an open channel corresponding to critical depth is (A) Zero (B) Minimum (C) Maximum (D) None of these

Description : The discharge in an open channel corresponding to critical depth is (A) Zero (B) Minimum (C) Maximum (D) None of these

Last Answer : Answer: Option C

A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. Which of the following statement is correct? (A) The pressure on the wall at the liquid level is minimum(B) The pressure on the bottom of the wall is maximum (C) The pressure on the wall at the liquid level is zero, and on the bottom of the wall is maximum (D) The pressure on the bottom of the wall is zero

Description : A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. Which of the following statement is correct? (A) The pressure on the wall at the liquid level is maximum (B) ... and on the bottom of the wall is maximum (D) The pressure on the bottom of the wall is zero

Last Answer : Answer: Option C

In a forced vortex, the velocity of flow everywhere within the fluid is (A) Maximum (B) Minimum (C) Zero (D) Nonzero finite

Description : In a forced vortex, the velocity of flow everywhere within the fluid is (A) Maximum (B) Minimum (C) Zero (D) Nonzero finite

Last Answer : Answer: Option D

The direct cost of a project with respect to normal time is (A) minimum (B) Maximum (C) Zero (D) Infinite

Description : The direct cost of a project with respect to normal time is (A) minimum (B) Maximum (C) Zero (D) Infinite

Last Answer : (A) minimum

At "Break-even point", (1) the industry is in equilibrium in the long run. (2) the producers suffers the minimum losses (3) the seller earns maximum profit (4) the firm is at zero-profit point

Description : At "Break-even point", (1) the industry is in equilibrium in the long run. (2) the producers suffers the minimum losses (3) the seller earns maximum profit (4) the firm is at zero-profit point

Last Answer : (4) the firm is at zero-profit point Explanation: The break-even point (BEP) is the point at which cost or expenses and revenue are equal: there is no net loss or gain, and one has "broken even." For businesses, reaching the break-even point is the first major step towards profitability.

What is meant by node point? A. The point at which amplitude of vibration is maximum B. The point at which amplitude of vibration is minimum C. The point at which amplitude of vibration is zero D. None of the above

Description : What is meant by node point? A. The point at which amplitude of vibration is maximum B. The point at which amplitude of vibration is minimum C. The point at which amplitude of vibration is zero D. None of the above

Last Answer : C. The point at which amplitude of vibration is zero

Which of the following statements is/are true for a simply supported beam? a. Deflection at supports in a simply supported beam is maximum. b.Deflection is maximum at a point where slope is zero . c. Slope is minimum at supports in a simply supported beam. d. All of the above.

Description : Which of the following statements is/are true for a simply supported beam? a. Deflection at supports in a simply supported beam is maximum. b.Deflection is maximum at a point where slope is zero . c. Slope is minimum at supports in a simply supported beam. d. All of the above

Last Answer : b.Deflection is maximum at a point where slope is zero .

At “Break-even point”, (1) the industry is in equilibrium in the long-run. (2) the producers suffers the minimum losses (3) the seller earns maximum profit (4) the firm is at zero-profit point

Description : At “Break-even point”, (1) the industry is in equilibrium in the long-run. (2) the producers suffers the minimum losses (3) the seller earns maximum profit (4) the firm is at zero-profit point 

Last Answer : the firm is at zero-profit point

To pump water from a water reservoir 3 m deep and maximum water level at 135 m, a pump is installed to lift water up to R.L. 175 m at a constant rate of 36,00,000 litres per hour. If the length of the pipe is 1506 m and f = 0.01, ignoring other minor losses and assuming the economical diameter from Lea's formula D = 1.2 Q, the water horse power of the pump is (A) 400 (B) 450 (C) 500(D) 600

Description : To pump water from a water reservoir 3 m deep and maximum water level at 135 m, a pump is  installed to lift water up to R.L. 175 m at a constant rate of 36,00,000 litres per hour. If the length  of the ... the water horse power of the pump is  (A) 400  (B) 450  (C) 500 (D) 600

Last Answer : (D) 600

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

For calculating the evaporation rate over a reservoir surface E = 0.771 (1.465 - 0.00732B) (0.44 - 0.007375 V) (pe - pa), the equation is given by (A) Roohwer's, formula in M.K.S. (B) Roohwer's formula in F.P.S. (C) Dalton's formula in F.P.S. (D) Dalton's formula in M.K.S

Description : For calculating the evaporation rate over a reservoir surface E = 0.771 (1.465 - 0.00732B) (0.44 - 0.007375 V) (pe - pa), the equation is given by (A) Roohwer's, formula in M.K.S. (B) Roohwer's formula in F.P.S. (C) Dalton's formula in F.P.S. (D) Dalton's formula in M.K.S

Last Answer : Answer: Option A

Construction joints are provided (A) Where B.M. and S.F. are small (B) Where the member is supported by other member (C) At 18 m apart in huge structures (D) All the above

Description : Construction joints are provided (A) Where B.M. and S.F. are small (B) Where the member is supported by other member (C) At 18 m apart in huge structures (D) All the above

Last Answer : (D) All the above

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

two forces acting at a joint are not along the straight line, then for the equilibrium of the joint (A) One of the forces must be zero (B) Each force must be zero (C) Forces must be equal and of the same sign (D) Forces must be equal in magnitude but opposite in sign

Description : two forces acting at a joint are not along the straight line, then for the equilibrium of the joint (A) One of the forces must be zero (B) Each force must be zero (C) Forces must be equal and of the same sign (D) Forces must be equal in magnitude but opposite in sign

Last Answer : (B) Each force must be zero

In a spring mass system of mass m and stiffness k, the end of the spring are securely fixed and mass is attached to intermediate point of spring. The natural frequency of longitudinal vibration of the system A) Is maximum when mass is attached to mid point of the spring B) Is minimum when mass is attached to mid point of the spring C) Decreases as the distance from the top end where mass is attached decreases D) Decreases as the distance from the bottom end where mass is attached decreases

Description : In a spring mass system of mass m and stiffness k, the end of the spring are securely fixed and mass is attached to intermediate point of spring. The natural frequency of longitudinal ... is attached decreases D) Decreases as the distance from the bottom end where mass is attached decreases

Last Answer : B) Is minimum when mass is attached to mid point of the spring

In a simply supported beam (l + 2a) with equal overhangs (a) and carrying a uniformly distributed load over its entire length, B.M. at the middle point of the beam will be zero if (A) l = 2a (B) l = 4a (C) l < 2a (D) l > a

Description : In a simply supported beam (l + 2a) with equal overhangs (a) and carrying a uniformly distributed load over its entire length, B.M. at the middle point of the beam will be zero if (A) l = 2a (B) l = 4a (C) l < 2a (D) l > a

Last Answer : (A) l = 2a

What is the distance away from midspan of a plastic hinge if developing in a simply supported beam of rectangular cross-section and span 6 m, subjected to a point load at the centre? (a) Zero (b) 1 m (c) 2 m (d) 3 m

Description : What is the distance away from midspan of a plastic hinge if developing in a simply supported beam of rectangular cross-section and span 6 m, subjected to a point load at the centre? (a) Zero (b) 1 m (c) 2 m (d) 3 m

Last Answer : (a) Zero

At break point of chlorination, (A) Chlorine is used to oxidise (B) Residual chloride is zero (C) Residual chloride is maximum (D) Residual chlorine reappears

Description : At break point of chlorination, (A) Chlorine is used to oxidise (B) Residual chloride is zero (C) Residual chloride is maximum (D) Residual chlorine reappears

Last Answer : (D) Residual chlorine reappears

At break point of chlorination, (A) Chlorine is used to oxidise (B) Residual chloride is zero (C) Residual chloride is maximum (D) Residual chlorine reappears

Description : At break point of chlorination,  (A) Chlorine is used to oxidise  (B) Residual chloride is zero  (C) Residual chloride is maximum  (D) Residual chlorine reappears 

Last Answer : (D) Residual chlorine reappears 

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

A fixed beam with central point load undergoes a slight settlement at one end. Select suitable answer from the following: (a) Moment induced at both ends will be same (b) Moment induced at the end that has undergone settlement will be maximum (c) Moment induced will be maximum at the end having no settlement (d) Zero moment at the end that has settled.

Description : A fixed beam with central point load undergoes a slight settlement at one end. Select suitable answer from the following: (a) Moment induced at both ends will be same (b) Moment induced at the end that ... will be maximum at the end having no settlement (d) Zero moment at the end that has settled.

Last Answer : (c) Moment induced will be maximum at the end having no settlement

The difference in the reservoir level and the lowest point of the water mains is 180 m. The expected pressure due to water hammer is 7.5 kg/cm2 in a pressure conduit of diameter 1 m. Assuming the efficiency of the riveted joints of the pipe as 0.6 and minimum cover 3 mm for corrosion, the thickness of the pipe materials, is (A) 10 mm (B) 15 mm (C) 20 mm (D) 25 mm

Description : The difference in the reservoir level and the lowest point of the water mains is 180 m. The  expected pressure due to water hammer is 7.5 kg/cm2  in a pressure conduit of diameter 1 m.  Assuming the efficiency of the ... , is  (A) 10 mm  (B) 15 mm  (C) 20 mm  (D) 25 mm 

Last Answer : (C) 20 mm

According to principle of transmissibility of forces, the effect of a force upon a body is (A) Maximum when it acts at the center of gravity of a body (B) Different at different points in its line of action (C) The same at every point in its line of action (D) Minimum when it acts at the C.G. of the body

Description : According to principle of transmissibility of forces, the effect of a force upon a body is (A) Maximum when it acts at the center of gravity of a body (B) Different at different points in its line of action ... at every point in its line of action (D) Minimum when it acts at the C.G. of the body

Last Answer : (C) The same at every point in its line of action

Development length is the length or extension that should be provided on either side from the [ A ] face of the support [ B ] point of maximum tension [ C ] point of maximum compression [ D ] point of minimum compression

Description : Development length is the length or extension that should be provided on either side from the [ A ] face of the support [ B ] point of maximum tension [ C ] point of maximum compression [ D ] point of minimum compression

Last Answer : [ B ] point of maximum tension

Development length is the length or extension that should be provided on either side from the [ A ] face of the support [ B ] point of maximum tension [ C ] point of maximum compression [ D ] point of minimum compression

Description : Development length is the length or extension that should be provided on either side from the [ A ] face of the support [ B ] point of maximum tension [ C ] point of maximum compression [ D ] point of minimum compression

Last Answer : [ B ] point of maximum tension

A particle of mass m is moving along a straight path through the origin of coordinates with a velocity v. The angular momentum of the particle about the origin (a) mv (b) Depends on its distance from origin (c) Is zero (d) Changes from positive to negative as it passes through the origin

Description : A particle of mass m is moving along a straight path through the origin of coordinates with a velocity v. The angular momentum of the particle about the origin (a) mv (b) Depends on its distance from origin (c) Is zero (d) Changes from positive to negative as it passes through the origin

Last Answer : Ans:(c)

A fire hose has a nozzle attached to it, and the nozzle discharges a jet of water into the atmosphere at a velocity of 20 m/s. this causes the joint of the nozzle with the hose to be in : (a) Tension (b) A state of zero stress (c) Compression (d) Bending stress

Description : A fire hose has a nozzle attached to it, and the nozzle discharges a jet of water into the atmosphere at a velocity of 20 m/s. this causes the joint of the nozzle with the hose to be in : (a) Tension (b) A state of zero stress (c) Compression (d) Bending stress

Last Answer : (a) Tension