A section of beam is said to be in pure bending, if it is subjected to

constant bending moment and constant shear force

constant shear force and zero bending moment

constant bending moment and zero shear force

The layer at the centre of gravity of the beam as shown in the below figure, will be

neither in tension nor in compression

The lower layer of the beam as shown in the below figure, will be

neither in tension nor in compression

In a simple bending theory, one of the assumption is that the plane sections before bending remain plane after bending. This assumption means that

stress is uniform throughout the beam

strain is uniform throughout the beam

stress is proportional to the distance from the neutral axis

strain is proportional to the distance from the neutral axis

In a simple bending theory, one of the assumption is that the material of the beam is isotropic. This assumption means that the

elastic constants varies linearly in the material

normal stress remains constant in all directions

normal stress varies linearly in the material

elastic constants are same in all the directions

elastic constants varies linearly in the material

The assumption, generally, made in the theory of simple bending is that

the beam material is perfectly homogenous and isotropic

the beam material is stressed within its elastic limit

the plane sections before bending remain plane after bending

When the shear force diagram is a parabolic curve between two points, it indicates that there is a

no loading between the two points

uniformly distributed load between the two points

uniformly varying load between the two points

When there is a sudden increase or decrease in shear force diagram between any two points, it indicates that there is a

no loading between the two points

uniformly distributed load between the two points

uniformly varying load between the two points

In a simply supported beam carrying a uniformly distributed load w per unit length, the point of contraflexure

depends upon the length of beam

The shear force at the ends of a simply supported beam carrying a uniformly distributed load of w per unit length is

wl2/2 at one end and - wl2/2 at the other end

wl at one end and - wl at the other end

wl/2 at one end and - wl/2 at the other end

wl2/2 at one end and - wl2/2 at the other end

When a load on the free end of a cantilever beam is increased, failure will occur

at a distance 2l/3 from free end

719 + Mcqs in Strength Of Materials in Civil Engineering Page 8 McqOptions

351.	The line of intersection of the neutral layer with any normal cross-section of the beam is called neutral axis.
A.	True
B.	False
Answer» B. False

Discussion

352.	When a beam is subjected to bending moment, the stress at any point is __________ the distance of the point from the neutral axis.
A.	equal to
B.	directly proportional to
C.	inversely proportional to
D.	independent of
Answer» C. inversely proportional to

Discussion

353.	A section of beam is said to be in pure bending, if it is subjected to
A.	constant bending moment and constant shear force
B.	constant shear force and zero bending moment
C.	constant bending moment and zero shear force
D.	none of the above
Answer» D. none of the above

Discussion

354.	The bending equation is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» B. [B].

Discussion

355.	When a beam is subjected to a bending moment, the strain in a layer is __________ the distance from the neutral axis.
A.	equal to
B.	directly proportional to
C.	inversely proportional to
D.	independent of
Answer» C. inversely proportional to

Discussion

356.	The layer at the centre of gravity of the beam as shown in the below figure, will be
A.	in tension
B.	in compression
C.	neither in tension nor in compression
Answer» D.

Discussion

357.	The lower layer of the beam as shown in the below figure, will be
A.	in tension
B.	in compression
C.	neither in tension nor in compression
Answer» B. in compression

Discussion

358.	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
Answer» E.

Discussion

359.	A rectangular beam subjected to a bending moment is shown in the below figure. The upper layer of the beam will be in tension.
A.	True
B.	False
Answer» C.

Discussion

360.	In a simple bending theory, one of the assumption is that the material of the beam is isotropic. This assumption means that the
A.	normal stress remains constant in all directions
B.	normal stress varies linearly in the material
C.	elastic constants are same in all the directions
D.	elastic constants varies linearly in the material
Answer» D. elastic constants varies linearly in the material

Discussion

361.	The bending moment at a section tends to bend or deflect the beam and the internal stresses resist its bending. The resistance offered by the internal stresses, to the bending, is called
A.	compressive stress
B.	shear stress
C.	bending stress
D.	elastic modulus
Answer» D. elastic modulus

Discussion

362.	The assumption, generally, made in the theory of simple bending is that
A.	the beam material is perfectly homogenous and isotropic
B.	the beam material is stressed within its elastic limit
C.	the plane sections before bending remain plane after bending
D.	all of the above
Answer» E.

Discussion

363.	In a beam where shear force changes sign, the bending moment will be
A.	zero
B.	minimum
C.	maximum
D.	infinity
Answer» D. infinity

Discussion

364.	When there is no increase or decrease in shear force between two points, it indicates that there is no change in the bending moment between these points.
A.	True
B.	False
Answer» C.

Discussion

365.	When the shear force diagram is a parabolic curve between two points, it indicates that there is a
A.	point load at the two points
B.	no loading between the two points
C.	uniformly distributed load between the two points
D.	uniformly varying load between the two points
Answer» E.

Discussion

366.	When the shear force diagram between any two points is an inclined straight line, it indicates that there is a uniformly varying load between the two points.
A.	Yes
B.	No
Answer» B. No

Discussion

367.	When there is a sudden increase or decrease in shear force diagram between any two points, it indicates that there is a
A.	point load at the two points
B.	no loading between the two points
C.	uniformly distributed load between the two points
D.	uniformly varying load between the two points
Answer» B. no loading between the two points

Discussion

368.	The maximum bending moment for the beam shown in the below figure, lies at a distance of __________ from the end B.
A.	l/2
B.	l/3
C.	[C].
D.	[D].
Answer» E.

Discussion

369.	In a simply supported beam carrying a uniformly distributed load w per unit length, the point of contraflexure
A.	lies in the centre of the beam
B.	lies at the ends of the beam
C.	depends upon the length of beam
D.	does not exist
Answer» E.

Discussion

370.	The maximum bending moment for the beam shown in the below figure, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» D. [D].

Discussion

371.	For the beam shown in the below figure, the shear force at A is equal to
A.	wl/6
B.	wl/3
C.	wl
D.	2 wl/3
Answer» C. wl

Discussion

372.	For the beam shown in the below figure, the shear force diagram between A and B is
A.	a horizontal line
B.	a vertical line
C.	an inclined line
D.	a parabolic curve
Answer» E.

Discussion

373.	The maximum bending moment for a simply supported beam with a gradually varying load from zero at both ends and w per metre at the centre, lies at the centre of a beam.
A.	Agree
B.	Disagree
Answer» B. Disagree

Discussion

374.	A simply supported beam with a gradually varying load from zero at B and w per unit length at A is shown in the below figure. The shear force at B is equal to
A.	wl/6
B.	wl/3
C.	wl
D.	2 wl/3
Answer» B. wl/3

Discussion

375.	The bending moment at the centre of a simply supported beam with a gradually varying load from zero at both ends to w per metre at the centre is wl/4.
A.	Yes
B.	No
Answer» C.

Discussion

376.	The shear force at the centre of a simply supported beam with a gradually varying load from zero at both ends to w per metre at the centre, is
A.	zero
B.	wl/4
C.	wl/2
D.	wl2/2
Answer» B. wl/4

Discussion

377.	The bending moment diagram for a simply supported beam carrying a uniformly distributed load of w per unit length, will be
A.	a horizontal line
B.	a vertical line
C.	an inclined line
D.	a parabolic curve
Answer» E.

Discussion

378.	The shear force diagram for a simply supported beam carrying a uniformly distributed load of w per unit length, consists of
A.	one right angled triangle
B.	two right angled triangles
C.	one equilateral triangle
D.	two equilateral triangles
Answer» C. one equilateral triangle

Discussion

379.	The shear force at the ends of a simply supported beam carrying a uniformly distributed load of w per unit length is
A.	zero at its both ends
B.	wl at one end and - wl at the other end
C.	wl/2 at one end and - wl/2 at the other end
D.	wl2/2 at one end and - wl2/2 at the other end
Answer» D. wl2/2 at one end and - wl2/2 at the other end

Discussion

380.	The shear force in the centre of a simply supported beam carrying a uniformly distributed load of w per unit length, is
A.	zero
B.	wl2/2
C.	wl2/4
D.	wl2/8
Answer» B. wl2/2

Discussion

381.	The shear force of a simply supported beam carrying a central point load changes sign at its midpoint.
A.	Correct
B.	Incorrect
Answer» B. Incorrect

Discussion

382.	The maximum bending moment of a simply supported beam with central point load lies at the point of loading.
A.	True
B.	False
Answer» B. False

Discussion

383.	The bending moment diagram for a simply supported beam loaded in its centre is
A.	a right angled triangle
B.	an issoscles triangle
C.	an equilateral triangle
D.	a rectangle
Answer» C. an equilateral triangle

Discussion

384.	The maximum bending moment of a simply supported beam of span l and carrying a point load W at the centre of beam, is
A.	Wl/4
B.	Wl/2
C.	Wl
D.	Wl2/4
Answer» B. Wl/2

Discussion

385.	The bending moment of a cantilever beam of length l and carrying a gradually varying load from zero at free end and w per unit length at the fixed end is __________ at the fixed end.
A.	wl/2
B.	wl
C.	wl2/2
D.	wl2/6
Answer» E.

Discussion

386.	The bending moment at the ends of a simply supported beam will be zero.
A.	Yes
B.	No
Answer» B. No

Discussion

387.	The shear force of a cantilever beam of length l and carrying a gradually varying load from zero at the free end and w per unit length at the fixed end is __________ at the fixed end.
A.	zero
B.	wl/4
C.	wl/2
D.	wl
Answer» D. wl

Discussion

388.	The bending moment diagram for a cantilever beam of length l and carrying a gradually varying load from zero at the free end and w per unit length at the fixed end is a parabolic curve.
A.	Agree
B.	Disagree
Answer» B. Disagree

Discussion

389.	The maximum bending moment of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length lies at the middle of its length.
A.	True
B.	False
Answer» C.

Discussion

390.	The shear force diagram fora cantilever beam of length l and carrying a gradually varying load from zero at free end and w per unit length at the fixed end is a
A.	horizontal straight line
B.	vertical straight line
C.	inclined line
D.	parabolic curve
Answer» E.

Discussion

391.	The bending moment of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length is __________ at the fixed end.
A.	wl/4
B.	wl/2
C.	wl
D.	wl2/2
Answer» E.

Discussion

392.	The bending moment of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length is __________ at the free end.
A.	zero
B.	wl/4
C.	wl/2
D.	wl
Answer» B. wl/4

Discussion

393.	The shear force diagram of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length will be
A.	a right angled triangle
B.	an issoscles triangle
C.	an equilateral triangle
D.	a rectangle
Answer» B. an issoscles triangle

Discussion

394.	The shear force of a cantilever beam of length l carrying a uniformly distributed load of w per unit length is __________ at the free end.
A.	zero
B.	wl/4
C.	wl/2
D.	wl
Answer» B. wl/4

Discussion

395.	The shear force of a cantilever beam of length l carrying a uniformly distributed load of w per unit length is __________ at the fixed end.
A.	zero
B.	wl/4
C.	wl/2
D.	wl
Answer» E.

Discussion

396.	The bending moment at the free end of a cantilever beam is
A.	zero
B.	minimum
C.	maximum
Answer» B. minimum

Discussion

397.	When a load on the free end of a cantilever beam is increased, failure will occur
A.	at the free end
B.	at the fixed end
C.	in the middle of the beam
D.	at a distance 2l/3 from free end
Answer» C. in the middle of the beam

Discussion

398.	The bending moment on a section is maximum where shear force is
A.	minimum
B.	maximum
C.	changing sign
D.	zero
Answer» D. zero

Discussion

399.	The shear force at a certain point on a beam changes sign from +ve value to -ve value or vice versa. The bending moment at that point will be zero.
A.	True
B.	False
Answer» C.

Discussion

400.	The shear force at apoint on a beam is the algebraic __________ of all the forces on either side of the point.
A.	sum
B.	difference
Answer» B. difference

Discussion

Explore topic-wise MCQs in Civil Engineering.

The line of intersection of the neutral layer with any normal cross-section of the beam is called neutral axis.

When a beam is subjected to bending moment, the stress at any point is __________ the distance of the point from the neutral axis.

A section of beam is said to be in pure bending, if it is subjected to

The bending equation is

When a beam is subjected to a bending moment, the strain in a layer is __________ the distance from the neutral axis.

The layer at the centre of gravity of the beam as shown in the below figure, will be

The lower layer of the beam as shown in the below figure, will be

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 rectangular beam subjected to a bending moment is shown in the below figure. The upper layer of the beam will be in tension.

In a simple bending theory, one of the assumption is that the material of the beam is isotropic. This assumption means that the

The bending moment at a section tends to bend or deflect the beam and the internal stresses resist its bending. The resistance offered by the internal stresses, to the bending, is called

The assumption, generally, made in the theory of simple bending is that

In a beam where shear force changes sign, the bending moment will be

When there is no increase or decrease in shear force between two points, it indicates that there is no change in the bending moment between these points.

When the shear force diagram is a parabolic curve between two points, it indicates that there is a

When the shear force diagram between any two points is an inclined straight line, it indicates that there is a uniformly varying load between the two points.

When there is a sudden increase or decrease in shear force diagram between any two points, it indicates that there is a

The maximum bending moment for the beam shown in the below figure, lies at a distance of __________ from the end B.

In a simply supported beam carrying a uniformly distributed load w per unit length, the point of contraflexure

The maximum bending moment for the beam shown in the below figure, is

For the beam shown in the below figure, the shear force at A is equal to

For the beam shown in the below figure, the shear force diagram between A and B is

The maximum bending moment for a simply supported beam with a gradually varying load from zero at both ends and w per metre at the centre, lies at the centre of a beam.

A simply supported beam with a gradually varying load from zero at B and w per unit length at A is shown in the below figure. The shear force at B is equal to

The bending moment at the centre of a simply supported beam with a gradually varying load from zero at both ends to w per metre at the centre is wl/4.

The shear force at the centre of a simply supported beam with a gradually varying load from zero at both ends to w per metre at the centre, is

The bending moment diagram for a simply supported beam carrying a uniformly distributed load of w per unit length, will be

The shear force diagram for a simply supported beam carrying a uniformly distributed load of w per unit length, consists of

The shear force at the ends of a simply supported beam carrying a uniformly distributed load of w per unit length is

The shear force in the centre of a simply supported beam carrying a uniformly distributed load of w per unit length, is

The shear force of a simply supported beam carrying a central point load changes sign at its midpoint.

The maximum bending moment of a simply supported beam with central point load lies at the point of loading.

The bending moment diagram for a simply supported beam loaded in its centre is

The maximum bending moment of a simply supported beam of span l and carrying a point load W at the centre of beam, is

The bending moment of a cantilever beam of length l and carrying a gradually varying load from zero at free end and w per unit length at the fixed end is __________ at the fixed end.

The bending moment at the ends of a simply supported beam will be zero.

The shear force of a cantilever beam of length l and carrying a gradually varying load from zero at the free end and w per unit length at the fixed end is __________ at the fixed end.

The bending moment diagram for a cantilever beam of length l and carrying a gradually varying load from zero at the free end and w per unit length at the fixed end is a parabolic curve.

The maximum bending moment of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length lies at the middle of its length.

The shear force diagram fora cantilever beam of length l and carrying a gradually varying load from zero at free end and w per unit length at the fixed end is a

The bending moment of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length is __________ at the fixed end.

The bending moment of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length is __________ at the free end.

The shear force diagram of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length will be

The shear force of a cantilever beam of length l carrying a uniformly distributed load of w per unit length is __________ at the free end.

The shear force of a cantilever beam of length l carrying a uniformly distributed load of w per unit length is __________ at the fixed end.

The bending moment at the free end of a cantilever beam is

When a load on the free end of a cantilever beam is increased, failure will occur

The bending moment on a section is maximum where shear force is

The shear force at a certain point on a beam changes sign from +ve value to -ve value or vice versa. The bending moment at that point will be zero.

The shear force at apoint on a beam is the algebraic __________ of all the forces on either side of the point.