Shear modulus is the ratio of

linear stress to lateral strain

volumetric strain to linear strain

The volumetric strain is the ratio of the

original thickness to the change in thickness

change in thickness to the original thickness

original volume to the change in volume

change in volume to the original volume

When a bar of length l, width b and thickness t is subjected to a push of P, its

length, width and thickness increases

length, width and thickness decreases

length increases, width and thickness decreases

length decreases, width and tickness increases

When a bar of length l, width b and thickness t is subjected to a pull of P, its

length decreases, width and thickness increases

length, width and thickness increases

length, width and thickness decreases

length increases, width and thickness decreases

length decreases, width and thickness increases

The thermal or temperature stress is a function of

coefficient of linear expansion

A bolt is made to pass through a tube and both of them are tightly fitted with the help of washers and nuts. If the nut is tightened, then

bolt arid tube are under tension

bolt and tube are under compression

bolt is under compression and tube is under tension

bolt is Under tension and tube is under compression

A rod is enclosed centrally in a tube and the assembly is tightened by rigid washers. If the assembly is subjected to a compressive load, then

tube is under tension and rod is under compression

both rod and tube are under compression

tube is under tension and rod is under compression

719 + Mcqs in Strength Of Materials in Civil Engineering Page 10 McqOptions

451.	When a body is subjected to a direct tensile stress (σ) in one plane, then maximum normal stress occurs at a section inclined at __________ to the normal of the section.
A.	0°
B.	30°
C.	45°
D.	90°
Answer» B. 30°

Discussion

452.	When a body is subjected to a direct tensile stress (σ) in one plane, then tangential or shear stress on an oblique section of the body inclined at an angle θ to the normal of the section is
A.	σ sin 2θ
B.	σ cos 2θ
C.	σ/2 sin 2θ
D.	σ/2 cos 2θ
Answer» D. σ/2 cos 2θ

Discussion

453.	The direct stress, across a principal plane, is known as principal stress.
A.	Yes
B.	No
Answer» B. No

Discussion

454.	The maximum diameter of the hole that can be punched from a plate of maximum shear stress 1/4th of its maximum crushing stress of punch, is equal to (where t = Thickness of the plate)
A.	t
B.	2t
C.	4t
D.	8t
Answer» D. 8t

Discussion

455.	In the above question, the normal stress on an oblique section will be maximum, when θ is equal to
A.	0°
B.	30°
C.	45°
D.	90°
Answer» B. 30°

Discussion

456.	When a body is subjected to a direct tensile stress (σ) in one plane, then normal stress on an oblique section of the body inclined at an angle θ to the normal of the section is
A.	σ cos θ
B.	σ cos2 θ
C.	σ sin θ
D.	σ sin2 θ
Answer» C. σ sin θ

Discussion

457.	The planes, which carry no shear stress, are known as principal planes.
A.	True
B.	False
Answer» B. False

Discussion

458.	Shear modulus is the ratio of
A.	linear stress to linear strain
B.	linear stress to lateral strain
C.	volumetric strain to linear strain
D.	shear stress to shear strain
Answer» E.

Discussion

459.	Within elastic limit, shear stress is __________ shear strain.
A.	equal to
B.	less than
C.	directly proportional to
D.	inversely proportional to
Answer» D. inversely proportional to

Discussion

460.	A shear stress across a plane, is always accompanied by a balancing shear stress across the plane and normal to it.
A.	True
B.	False
Answer» C.

Discussion

461.	If the modulus of elasticity for a given material is twice its modulus of rigidity, then bulk modulus is equal to
A.	2C
B.	3C
C.	[C].
D.	[D].
Answer» D. [D].

Discussion

462.	The Young's modulus of a material is 125 GPa and Poissons ratio is 0.25. The modulus of rigidity of me material is
A.	30 GPa
B.	50 GPa
C.	80 GPa
D.	100 GPa
Answer» C. 80 GPa

Discussion

463.	The ratio of shear modulus to the modulus of elasticity for a Poisson's ratio of 0.4 will be
A.	5/7
B.	7/5
C.	5/14
D.	14/5
Answer» D. 14/5

Discussion

464.	The relation between Young's modulus (E), shear modulus (C) and bulk modulus (K) is given by
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» D. [D].

Discussion

465.	If the modulus of elasticity of a material is twice its modulus of rigidity, then the Poisson's ratio of the material is equal to zero.
A.	Correct
B.	Incorrect
Answer» B. Incorrect

Discussion

466.	The relation between Young's modulus (E) and bulk modulus (K) is given by
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» E.

Discussion

467.	The ratio of bulk modulus to Young's modulus for a Poisson's ratio of 0.25 will be
A.	1/3
B.	2/3
C.	1
D.	3/2
Answer» C. 1

Discussion

468.	The relation between modulus of elasticity (E) and modulus of rigidity (C) is given by
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» B. [B].

Discussion

469.	When a body is subjected to three mutually perpendicular stresses, of equal intensity, the ratio of direct stress to the corresponding volumetric strain is known as
A.	Young's modulus
B.	modulus of rigidity
C.	bulk modulus
D.	Poisson's ratio
Answer» D. Poisson's ratio

Discussion

470.	When a rectangular bar of length l, breadth b and thickness t is subjected to an axial pull of P, then linear strain (ε) is given by (where E = Modulus of elasticity)
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» B. [B].

Discussion

471.	The volumetric strain is the ratio of the
A.	original thickness to the change in thickness
B.	change in thickness to the original thickness
C.	original volume to the change in volume
D.	change in volume to the original volume
Answer» E.

Discussion

472.	When a bar of length l, width b and thickness t is subjected to a push of P, its
A.	length, width and thickness increases
B.	length, width and thickness decreases
C.	length increases, width and thickness decreases
D.	length decreases, width and tickness increases
Answer» E.

Discussion

473.	The Poisson's ratio for cast iron varies from
A.	0.33 to 0.37
B.	0.21 to 0.26
C.	0.31 to 0.34
D.	0.32 to 0.42
Answer» C. 0.31 to 0.34

Discussion

474.	The ratio of change in volume to the original volume is called
A.	linear strain
B.	lateral strain
C.	volumetric strain
D.	Poisson's ratio
Answer» D. Poisson's ratio

Discussion

475.	When a bar of length l, width b and thickness t is subjected to a pull of P, its
A.	length, width and thickness increases
B.	length, width and thickness decreases
C.	length increases, width and thickness decreases
D.	length decreases, width and thickness increases
Answer» D. length decreases, width and thickness increases

Discussion

476.	A steel bar 2 m long, 20 mm wide and 10 mm thick is subjected to a pull of 2 kN. If the same bar is subjected to a push of 2 kN, the Poission's ratio of the bar in tension will be __________ the Poisson's ratio for the bar in compression.
A.	equal to
B.	less than
C.	greater than
Answer» B. less than

Discussion

477.	The ratio of the lateral strain to the linear strain is called
A.	modulus of elasticity
B.	modulus of rigidity
C.	bulk modulus
D.	Poisson's ratio
Answer» E.

Discussion

478.	Every direct stress is always accompanied by a strain in its own direction and an opposite kind of strain in every direction, at right angles to it. Such a strain is known as
A.	linear strain
B.	lateral strain
C.	volumetric strain
D.	shear strain
Answer» C. volumetric strain

Discussion

479.	Poisson's ratio is the ratio of linear stein to the volumetric strain.
A.	True
B.	False
Answer» C.

Discussion

480.	The deformation of the bar per unit length in the direction of the force is known as
A.	linear strain
B.	lateral strain
C.	volumetric strain
D.	shear strain
Answer» B. lateral strain

Discussion

481.	When a circular bar tapering uniformly from diameter d1, at one end to diameter d2 at the other end, is subjected to an increase in temperature (t), then the thermal stress induced is (where α = Coefficient of linear expansion, and E = Modulus of elasticity for the bar material)
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» B. [B].

Discussion

482.	If there is a fall in the temperature of a composite body, then a member having greater coefficient of linear expansion will be subjected to compressive stress.
A.	True
B.	False
Answer» C.

Discussion

483.	When a bar is cooled to - 5°C, it will develop
A.	no stress
B.	shear stress
C.	tensile stress
D.	compressive stress
Answer» D. compressive stress

Discussion

484.	The thermal or temperature stress is a function of
A.	increase in temperature
B.	modulus of elasticity
C.	coefficient of linear expansion
D.	all of these
Answer» E.

Discussion

485.	The thermal stress __________ upon the cross-sectional area of the bar.
A.	depends
B.	does not depend
Answer» C.

Discussion

486.	A steel bar of 5 mm is heated from 15° C to 40° C and it is free to expand. The bar Will induce
A.	no stress
B.	shear stress
C.	tensile stress
D.	compressive stress
Answer» B. shear stress

Discussion

487.	The thermal stress in a bar is __________ proportional to the change in temperature.
A.	directly
B.	indirectly
Answer» B. indirectly

Discussion

488.	A bar of copper and steel form a composite system, which is heated to a temperature of 40°C. The stress induced in the copper bar will be
A.	tensile
B.	compressive
C.	shear
D.	zero
Answer» C. shear

Discussion

489.	A bolt is made to pass through a tube and both of them are tightly fitted with the help of washers and nuts. If the nut is tightened, then
A.	bolt arid tube are under tension
B.	bolt and tube are under compression
C.	bolt is under compression and tube is under tension
D.	bolt is Under tension and tube is under compression
Answer» E.

Discussion

490.	A rod is enclosed centrally in a tube and the assembly is tightened by rigid washers. If the assembly is subjected to a compressive load, then
A.	rod is under compression
B.	tube is under compression
C.	both rod and tube are under compression
D.	tube is under tension and rod is under compression
Answer» D. tube is under tension and rod is under compression

Discussion

491.	The shear modulus of most materials with respect to the modulus of elasticity is
A.	equal to half
B.	less than half
C.	more than half
D.	none of these
Answer» C. more than half

Discussion

492.	Modular ratio of the two materials is the ratio of
A.	linear stress to linear strain
B.	shear stress to shear strain
C.	their modulus of elasticities
D.	their modulus of rigidities
Answer» D. their modulus of rigidities

Discussion

493.	The ultimate tensile stress for mild steel is __________ the ultimate compressive stress.
A.	equal to
B.	less than
C.	more than
Answer» D.

Discussion

494.	The extension of a circular bar tapering uniformly from diameter d1 at one end to diameter d2 at the other end, and subjected to an axial pull of P is __________ the extension of a circular bar of diameter d1 d2 subjected to the same load P.
A.	equal to
B.	less than
C.	greater than
Answer» B. less than

Discussion

495.	The extension of a circular bar tapering uniformly from diameter d1 at one end to diameter d2 at the other end, and subjected to an axial pull of P is given by
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» D. [D].

Discussion

496.	A bar of length L metres extends by l mm under a tensile force of P. The strain produced in the bar is
A.	l/L
B.	0.1 l/L
C.	0.01 l/L
D.	0.001 l/L
Answer» E.

Discussion

497.	When a bar of length l and diameter d is rigidly fixed at the upper end and hanging freely, then the total elongation produced in the bar due to its own weight is (where w = Weight per unit volume of the bar)
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» C. [C].

Discussion

498.	The length of a conical bar is l, diameter of base is d and weight per unit volume is w. It is fixea at its upper end and hanging freely. The elongation of the bar under the action of its own weight will be
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» D. [D].

Discussion

499.	The elongation of a conical bar under its own weight is __________ that of prismatic bar of the same length.
A.	equal to
B.	half
C.	one-third
D.	two-third
Answer» D. two-third

Discussion

500.	The deformation of a bar under its own weight is __________ the deformation, if the same body is subjected to a direct load equal to weight of the body.
A.	equal to
B.	half
C.	double
D.	quadruple
Answer» C. double

Discussion

Explore topic-wise MCQs in Civil Engineering.

When a body is subjected to a direct tensile stress (σ) in one plane, then maximum normal stress occurs at a section inclined at __________ to the normal of the section.

When a body is subjected to a direct tensile stress (σ) in one plane, then tangential or shear stress on an oblique section of the body inclined at an angle θ to the normal of the section is

The direct stress, across a principal plane, is known as principal stress.

The maximum diameter of the hole that can be punched from a plate of maximum shear stress 1/4th of its maximum crushing stress of punch, is equal to (where t = Thickness of the plate)

In the above question, the normal stress on an oblique section will be maximum, when θ is equal to

When a body is subjected to a direct tensile stress (σ) in one plane, then normal stress on an oblique section of the body inclined at an angle θ to the normal of the section is

The planes, which carry no shear stress, are known as principal planes.

Shear modulus is the ratio of

Within elastic limit, shear stress is __________ shear strain.

A shear stress across a plane, is always accompanied by a balancing shear stress across the plane and normal to it.

If the modulus of elasticity for a given material is twice its modulus of rigidity, then bulk modulus is equal to

The Young's modulus of a material is 125 GPa and Poissons ratio is 0.25. The modulus of rigidity of me material is

The ratio of shear modulus to the modulus of elasticity for a Poisson's ratio of 0.4 will be

The relation between Young's modulus (E), shear modulus (C) and bulk modulus (K) is given by

If the modulus of elasticity of a material is twice its modulus of rigidity, then the Poisson's ratio of the material is equal to zero.

The relation between Young's modulus (E) and bulk modulus (K) is given by

The ratio of bulk modulus to Young's modulus for a Poisson's ratio of 0.25 will be

The relation between modulus of elasticity (E) and modulus of rigidity (C) is given by

When a body is subjected to three mutually perpendicular stresses, of equal intensity, the ratio of direct stress to the corresponding volumetric strain is known as

When a rectangular bar of length l, breadth b and thickness t is subjected to an axial pull of P, then linear strain (ε) is given by (where E = Modulus of elasticity)

The volumetric strain is the ratio of the

When a bar of length l, width b and thickness t is subjected to a push of P, its

The Poisson's ratio for cast iron varies from

The ratio of change in volume to the original volume is called

When a bar of length l, width b and thickness t is subjected to a pull of P, its

A steel bar 2 m long, 20 mm wide and 10 mm thick is subjected to a pull of 2 kN. If the same bar is subjected to a push of 2 kN, the Poission's ratio of the bar in tension will be __________ the Poisson's ratio for the bar in compression.

The ratio of the lateral strain to the linear strain is called

Every direct stress is always accompanied by a strain in its own direction and an opposite kind of strain in every direction, at right angles to it. Such a strain is known as

Poisson's ratio is the ratio of linear stein to the volumetric strain.

The deformation of the bar per unit length in the direction of the force is known as

When a circular bar tapering uniformly from diameter d1, at one end to diameter d2 at the other end, is subjected to an increase in temperature (t), then the thermal stress induced is (where α = Coefficient of linear expansion, and E = Modulus of elasticity for the bar material)

If there is a fall in the temperature of a composite body, then a member having greater coefficient of linear expansion will be subjected to compressive stress.

When a bar is cooled to - 5°C, it will develop

The thermal or temperature stress is a function of

The thermal stress __________ upon the cross-sectional area of the bar.

A steel bar of 5 mm is heated from 15° C to 40° C and it is free to expand. The bar Will induce

The thermal stress in a bar is __________ proportional to the change in temperature.

A bar of copper and steel form a composite system, which is heated to a temperature of 40°C. The stress induced in the copper bar will be

A bolt is made to pass through a tube and both of them are tightly fitted with the help of washers and nuts. If the nut is tightened, then

A rod is enclosed centrally in a tube and the assembly is tightened by rigid washers. If the assembly is subjected to a compressive load, then

The shear modulus of most materials with respect to the modulus of elasticity is

Modular ratio of the two materials is the ratio of

The ultimate tensile stress for mild steel is __________ the ultimate compressive stress.

The extension of a circular bar tapering uniformly from diameter d1 at one end to diameter d2 at the other end, and subjected to an axial pull of P is __________ the extension of a circular bar of diameter d1 d2 subjected to the same load P.

The extension of a circular bar tapering uniformly from diameter d1 at one end to diameter d2 at the other end, and subjected to an axial pull of P is given by

A bar of length L metres extends by l mm under a tensile force of P. The strain produced in the bar is

When a bar of length l and diameter d is rigidly fixed at the upper end and hanging freely, then the total elongation produced in the bar due to its own weight is (where w = Weight per unit volume of the bar)

The length of a conical bar is l, diameter of base is d and weight per unit volume is w. It is fixea at its upper end and hanging freely. The elongation of the bar under the action of its own weight will be

The elongation of a conical bar under its own weight is __________ that of prismatic bar of the same length.

The deformation of a bar under its own weight is __________ the deformation, if the same body is subjected to a direct load equal to weight of the body.