In rectangular columns (cross-section b x h), the core is a

rectangle of lengths b/2 and h/2

rhombus of diagonals b/3 and h/3

A semi-circular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi-cricular disc and horizontal surface is i. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will

lant up towards direction of pull

lant down towards direction of pull

In determining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than

our members with unknown forces of the frame

wo members with unknown forces of the frame

hree members with unknown forces of the frame

our members with unknown forces of the frame

hree members with known forces of the frame

D Alembert’s principle is used for

etermining stresses in the truss

educing the problem of kinetics to equivalent statics problem

etermining stresses in the truss

Which is the correct statement about law of polygon of forces ?

f any number of forces acting at a point can be represented by the sides of a polygon taken in order, then the forces are in equilibrium

f any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon, then the forces are in equilibrium

f a polygon representing forces acting at a point is closed then forces are in equilibrium

f any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon taken in order, then the forces are in equilibrium

A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal

etal is twice as dense as water

ensity of metal can’t be determined

etal is twice as dense as water

etal is twice as dense as unknown fluid

Failure of riverted joints is due to

Tearing of the plates between the rivet hole and the edge of the plate

Tearing of plates between rivets

719 + Mcqs in Strength Of Materials in Civil Engineering Page 12 McqOptions

551.	Euler's formula states that the buckling load P for a column of length l, both ends hinged and whose least moment of inertia and modulus of elasticity of the material of the column are I and E respectively, is given by the relation
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	P = πEl2.
Answer» B. [B].

Discussion

552.	In rectangular columns (cross-section b x h), the core is a
A.	rectangle of lengths b/2 and h/2
B.	square of length b/2
C.	rhombus of length h/2
D.	rhombus of diagonals b/3 and h/3
E.	none of the these.
Answer» E. none of the these.

Discussion

553.	For a beam, if fundamental equations of statics are not sufficient to determine all the reactive forces at the supports, the structure is said to be
A.	determinate
B.	statically determinate
C.	statically indeterminate
D.	none of these.
Answer» D. none of these.

Discussion

554.	If the depth of a simply supported beam carrying an isolated load at its centre, is doubled, the deflection of the beam at the centre will be changed by a factor of
A.	2
B.	1/2
C.	8
D.	1/8
E.	4
Answer» E. 4

Discussion

555.	A uniform girder simply supported at its ends is subjected to a uniformly distributed load over its entire length and is propped at the centre so as to neutralise the deflection. The net B.M. at the centre will be
A.	WL
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» E. [E].

Discussion

556.	The moment diagram for a cantilever carrying linearly varying load from zero at its free end and to maximum at the fixed end will be a
A.	triangle
B.	rectangle
C.	parabola
D.	cubic parabola.
Answer» E.

Discussion

557.	A cantilever carrying a uniformly distributed load W over its full length is propped at its free end such that it is at the level of the fixed end. The bending moment will be zero at its free end also at
A.	mid point of the cantilever
B.	fixed point of the cantilever
C.	1/4th length from free end
D.	3/4th length from free end
E.	half length from free end.
Answer» E. half length from free end.

Discussion

558.	Maximum deflection of a cantilever due to pure bending moment M at its free end, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» E. [E].

Discussion

559.	The ratio of the maximum deflection of a cantilever beam with an isolated load at its free end and with a uniformly distributed load over its entire length, is
A.	1
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» E. [E].

Discussion

560.	The ratio of the maximum deflections of a beam simply supported at its ends with an isolated central load and that of with a uniformly distributed load over its entire length, is
A.	1
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» D. [D].

Discussion

561.	The maximum deflection of a simply supported beam of length L with a central load W, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» D. [D].

Discussion

562.	In a simply supported beam L with a triangular load W varying from zero at one end to the maximum value at the other end, the maximum bending moment is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» E. [E].

Discussion

563.	For a simply supported beam carrying uniformly distributed load W on it entire length L, the maximum bending moment is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» C. [C].

Discussion

564.	The shape of the bending moment diagram over the length of a beam, carrying a uniformly increasing load, is always
A.	linear
B.	parabolic
C.	cubical
D.	circular.
Answer» D. circular.

Discussion

565.	A simply supported beam carries two equal concentrated loads W at distances L/3 from either support. The maximum bending moment
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» B. [B].

Discussion

566.	A simply supported beam of span L carries a concentrated load W at its mid-span. The maximum bending moment M is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» C. [C].

Discussion

567.	A simply supported beam of span L carries a uniformly distributed load W. The maximum bending moment M is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» D. [D].

Discussion

568.	If a member is subjected to a tensile force P, having its normal cross-section A, the resulting shear stress in an oblique plane inclined at an angle θ to its transverse plane, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» C. [C].

Discussion

569.	If two tensile forces mutually perpendicular act on a rectangular parallelopiped bar are equal, the resulting elongation of the pipe, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» B. [B].

Discussion

570.	If the normal cross-section A of a member is subjected to tensile force P, the resulting normal stress in an oblique plane inclined at angle θ to transverse plane will be
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» C. [C].

Discussion

571.	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.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» B. [B].

Discussion

572.	The distance between the centres of adjacent rivets in the same row, is called
A.	pitch
B.	lap
C.	gauge
D.	staggered pitch.
Answer» B. lap

Discussion

573.	A steel rod of 2 cm diameter and 5 metres long is subjected to an axial pull of 3000 kg. If E = 2.1 x 106, the elongation of the rod will be
A.	2.275 mm
B.	0.2275 mm
C.	0.02275 mm
D.	2.02275 mm.
Answer» C. 0.02275 mm

Discussion

574.	For a given material, if E, C, K and m are Young's modulus, shearing modulus, bulk modulus and poisson ratio, the following relation does not hold good
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» D. [D].

Discussion

575.	The ratio of elongations of a conical bar due to its own weight and that of a prismatic bar of the same length, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» C. [C].

Discussion

576.	The law which states, "within elastic limits strain produced is proportional to the stress producing it", is known as
A.	Bernoulli's law
B.	Stress law
C.	Hooke's law
D.	Poisson's law
E.	none of these.
Answer» D. Poisson's law

Discussion

577.	The property of a material by which it can be drawn to a smaller section, due to tension, is called
A.	plasticity
B.	ductility
C.	elasticity
D.	malleability.
Answer» C. elasticity

Discussion

578.	A semi-circular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi-cricular disc and horizontal surface is i. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will
A.	emain horizontal
B.	lant up towards direction of pull
C.	lant down towards direction of pull
D.	npredictable
Answer» D. npredictable

Discussion

579.	The co-efficient of friction depends upon
A.	ature of surfaces
B.	rea of contact
C.	hape of the surfaces
D.	il of the above.
Answer» B. rea of contact

Discussion

580.	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.	aximum
B.	inimum
C.	ero
D.	nfinity
Answer» D. nfinity

Discussion

581.	The center of percussion of the homogeneous rod of length L suspended at the top will be
A.	/2
B.	/3
C.	L/4
D.	L/3
Answer» E.

Discussion

582.	A particle inside a hollow sphere of radius r, having coefficient of friction -rr can rest upto height of
A.	/2
B.	/A
C.	/%
D.	.134 r
Answer» E.

Discussion

583.	Which of the following is not the unit of power ?
A.	W (kilowatt)
B.	p (horse power)
C.	g m/sec
D.	cal/kg sec.
Answer» E.

Discussion

584.	Which of the following is not a scalar quantity
A.	ass
B.	olume
C.	ensity
D.	cceleration.
Answer» E.

Discussion

585.	In determining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than
A.	wo members with unknown forces of the frame
B.	hree members with unknown forces of the frame
C.	our members with unknown forces of the frame
D.	hree members with known forces of the frame
Answer» C. our members with unknown forces of the frame

Discussion

586.	The magnitude of two forces, which when acting at right angle produce resultant force of VlOkg and when acting at 60° produce resultant of Vl3 kg. These forces are
A.	and V6
B.	and 1 kg
C.	5 and V5
D.	and 5
Answer» D. and 5

Discussion

587.	D Alembert’s principle is used for
A.	educing the problem of kinetics to equivalent statics problem
B.	etermining stresses in the truss
C.	tability of floating bodies
D.	esigning safe structures
Answer» B. etermining stresses in the truss

Discussion

588.	The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is as per the principle of
A.	orces
B.	ndependence of forces
C.	alance of force
D.	esolution of forces.
Answer» E.

Discussion

589.	The resultant of the following three couples 20 kg force, 0.5 m arm, + ve sense 30 kg force, 1 m arm, – ve sense 40 kg force, 0.25 m arm, + ve sense having arm of 0.5 m will be
A.	0 kg, – ve sense
B.	0 kg, + ve sense
C.	0 kg, + ve sense
D.	0 kg, – ve sense
Answer» B. 0 kg, + ve sense

Discussion

590.	The effort required to lift a load W on a screw jack with helix angle a and angle of friction
A.	tan(a + <)>)
B.	tan(a-<)>)
C.	cos(a + )
D.	sin(a + <(>)
Answer» B. tan(a-<)>)

Discussion

591.	Which is the correct statement about law of polygon of forces ?
A.	f any number of forces acting at a point can be represented by the sides of a polygon taken in order, then the forces are in equilibrium
B.	f any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon, then the forces are in equilibrium
C.	f a polygon representing forces acting at a point is closed then forces are in equilibrium
D.	f any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon taken in order, then the forces are in equilibrium
Answer» E.

Discussion

592.	When trying to turn a key into a lock, following is applied
A.	oplanar force
B.	on-coplanar forces
C.	oment
D.	ouple
Answer» E.

Discussion

593.	Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one
A.	llipse
B.	yperbola
C.	arabola
D.	ircle
Answer» C. arabola

Discussion

594.	A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal
A.	ensity of metal can’t be determined
B.	etal is twice as dense as water
C.	etal will float in water
D.	etal is twice as dense as unknown fluid
Answer» B. etal is twice as dense as water

Discussion

595.	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.	middle third rule of columns
B.	middle fourth rule of columns
C.	none of these.
Answer» D.

Discussion

596.	The length of a column which gives the same value of buckling load by Euler and Rankine-Gordon formula, is equal to
A.	0.8 tonnes
B.	none of these.
Answer» C.

Discussion

597.	If b is the width of a plate joined by diamond riveting of diameter d, the efficiency of the joint is given by
A.	2
B.	3
Answer» C.

Discussion

598.	The force in member U2L2 of the truss shown in below figure, is
A.	equal to 3œÄ/16
B.	none of these.
C.	10 T tension
D.	10 T compression
Answer» C. 10 T tension

Discussion

599.	The width b and depth d of a beam cut from a wooden cylindrical log of 100 cm diameter for maximum strength are :
A.	20 tonnes metre
B.	none of these.
C.	b = 57.73 cm d = 81.65 cm
D.	b = 81.65 cm d = 57.73 cm
Answer» B. none of these.

Discussion

600.	Failure of riverted joints is due to
A.	16 t-m
B.	zero.
C.	Tearing of the plates between the rivet hole and the edge of the plate
D.	Tearing of plates between rivets
Answer» E.

Discussion

Explore topic-wise MCQs in Civil Engineering.

Euler's formula states that the buckling load P for a column of length l, both ends hinged and whose least moment of inertia and modulus of elasticity of the material of the column are I and E respectively, is given by the relation

In rectangular columns (cross-section b x h), the core is a

For a beam, if fundamental equations of statics are not sufficient to determine all the reactive forces at the supports, the structure is said to be

If the depth of a simply supported beam carrying an isolated load at its centre, is doubled, the deflection of the beam at the centre will be changed by a factor of

A uniform girder simply supported at its ends is subjected to a uniformly distributed load over its entire length and is propped at the centre so as to neutralise the deflection. The net B.M. at the centre will be

The moment diagram for a cantilever carrying linearly varying load from zero at its free end and to maximum at the fixed end will be a

A cantilever carrying a uniformly distributed load W over its full length is propped at its free end such that it is at the level of the fixed end. The bending moment will be zero at its free end also at

Maximum deflection of a cantilever due to pure bending moment M at its free end, is

The ratio of the maximum deflection of a cantilever beam with an isolated load at its free end and with a uniformly distributed load over its entire length, is

The ratio of the maximum deflections of a beam simply supported at its ends with an isolated central load and that of with a uniformly distributed load over its entire length, is

The maximum deflection of a simply supported beam of length L with a central load W, is

In a simply supported beam L with a triangular load W varying from zero at one end to the maximum value at the other end, the maximum bending moment is

For a simply supported beam carrying uniformly distributed load W on it entire length L, the maximum bending moment is

The shape of the bending moment diagram over the length of a beam, carrying a uniformly increasing load, is always

A simply supported beam carries two equal concentrated loads W at distances L/3 from either support. The maximum bending moment

A simply supported beam of span L carries a concentrated load W at its mid-span. The maximum bending moment M is

A simply supported beam of span L carries a uniformly distributed load W. The maximum bending moment M is

If a member is subjected to a tensile force P, having its normal cross-section A, the resulting shear stress in an oblique plane inclined at an angle θ to its transverse plane, is

If two tensile forces mutually perpendicular act on a rectangular parallelopiped bar are equal, the resulting elongation of the pipe, is

If the normal cross-section A of a member is subjected to tensile force P, the resulting normal stress in an oblique plane inclined at angle θ to transverse plane will be

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

The distance between the centres of adjacent rivets in the same row, is called

A steel rod of 2 cm diameter and 5 metres long is subjected to an axial pull of 3000 kg. If E = 2.1 x 106, the elongation of the rod will be

For a given material, if E, C, K and m are Young's modulus, shearing modulus, bulk modulus and poisson ratio, the following relation does not hold good

The ratio of elongations of a conical bar due to its own weight and that of a prismatic bar of the same length, is

The law which states, "within elastic limits strain produced is proportional to the stress producing it", is known as

The property of a material by which it can be drawn to a smaller section, due to tension, is called

The co-efficient of friction depends upon

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

The center of percussion of the homogeneous rod of length L suspended at the top will be

A particle inside a hollow sphere of radius r, having coefficient of friction -rr can rest upto height of

Which of the following is not the unit of power ?

Which of the following is not a scalar quantity

In determining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than

The magnitude of two forces, which when acting at right angle produce resultant force of VlOkg and when acting at 60° produce resultant of Vl3 kg. These forces are

D Alembert’s principle is used for

The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is as per the principle of

The resultant of the following three couples 20 kg force, 0.5 m arm, + ve sense 30 kg force, 1 m arm, – ve sense 40 kg force, 0.25 m arm, + ve sense having arm of 0.5 m will be

The effort required to lift a load W on a screw jack with helix angle a and angle of friction

Which is the correct statement about law of polygon of forces ?

When trying to turn a key into a lock, following is applied

Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one

A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal

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

The length of a column which gives the same value of buckling load by Euler and Rankine-Gordon formula, is equal to

If b is the width of a plate joined by diamond riveting of diameter d, the efficiency of the joint is given by

The force in member U2L2 of the truss shown in below figure, is

The width b and depth d of a beam cut from a wooden cylindrical log of 100 cm diameter for maximum strength are :

Failure of riverted joints is due to