Strength of Materials MCQs Set-2

Page 1 of 4

1.

___________strain is the deformation of the bar per unit length in the direction of the force.

Linear

Volumetric

Lateral

Shear

2.

Young's modulus of elasticity for a perfectly rigid body is

infinity

zero

unity

none of these

3.

The area under the stress-strain curve represents

energy required to cause failure

breaking strength of material

toughness of material

hardness of material

4.

The strain energy stored in a body due to external loading, within the elastic limit is known as

resilience

ductility

toughness

malleability

5.

If a material expands freely due to heating, it will develop

Bending

Tensile stress

thermal stresses

No stress

6.

The hoop stresses are acting across the

longitudinal section

circumferential section

radial section

none of these

7.

When a beam is loaded the horizontal or longitudinal shear should be accounted for materials like

Cast iron

Concrete

Wood

Lead

8.

Where are the steel bars in a concrete beam embedded?

In the centre

Near top section

Uniformly

Near bottom section

9.

Stress at the boundary of kern

any value

zero

maximum

minimum

10.

Proof stress is related to

fracture

yielding

necking

elongation

Page 2 of 4

11.

A prismatic bar when subjected to pure bending assumes the shape of

cubic parabola

quadratic parabola

arc of a circle

catenary

12.

If a material expands freely due to heating, it will develop

compressive stresses

thermal stresses

no stresses

tensile stresses

13.

The ultimate tensile stress of mild steel compared to ultimate compressive stress is

unpredictable

same

more

less

14.

In curved beams the distribution of bending stress is

Uniform

Hyperbolic

Linear

Parabolic

15.

Principle planes are planes having

none of these

minimum shear stress

maximum shear stress

no shear stress

16.

According to Rankin's hypothesis, the criterion of failure of a brittle material is

maximum shear strain energy

maximum principal stress

maximum shear stress

maximum strain energy

17.

The maximum bending moment due to a moving load on a simply supported beam, occurs

anywhere on the beam

at the supports

under the load

at the mid span

18.

Strain in a direction at right angle to the direction of applied force is known as

None of these

Lateral strain

Shear strain

Volumetric strain

19.

The thermal stress in a bar is directly proportional to

none of these

the change in temperature

its volume

its cross-sectional area

20.

Neutral plane of a beam

Is one whose length remains unchanged during the deformation

Lies at bottom most fibre

Passes through the CG

None of these

Page 3 of 4

21.

Which of the following are statically indeterminate beams?

a) Fixed beam

Both (a) and (b)

None of these

b) Continuous beam

22.

The neutral axis in curved beams

coincides with the geometric axis

lies at the bottom of the beam

does not coincide

lies at the top of the beam

23.

The unit of Young's modulus is same as that of

Young's modulus

None of these

Stress

Strain

24.

The maximum strain energy that can be stored in a body is known as

resilience

impact energy

proof resilience

modulus of resilience

25.

The strain energy stored by the body within elastic limit when loaded externally is called as

Proof resilience

Resilience

None of these

Modulus of elasticity

26.

The shear stress at the centre of a circular shaft

minimum

maximum

zero

unpredictable

27.

Strain energy is the

maximum strain energy which can be stored in a body

energy stored in a body when strained upto the breaking of a specimen

energy stored in a body when strained within elastic limits

proof resilience per unit volume of a material

28.

For a linearly elastic, isotropic and homogeneous material the number of elastic constants require to relate stress and strain is

three

two

six

four

29.

The maximum bending moment due to a moving load on a fixed ended beam occurs

none of these

under the load only

at a support

always at the mid span

30.

A beam is said to be uniform strength if

the deflection is the same throughout the beam

the shear stress is the same throughout the beam

the bending moment is the same throughout the beam

every horizontal plane

Page 4 of 4

31.

The total strain energy stored in a body is termed as

resilience

proof resilience

modulus of resilience

impact energy

32.

Young's modulus of a wire is defined as the stress which will increase the length of wire compared to its original length by

Half

Same amount

One-fourth

Double

33.

The volumetric strain is the ratio of the

change in thickness to the original thickness

original volume to the change in volume

change in volume to the original volume

original thickness to the change in thickness

34.

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

volumetric strain

lateral strain

shear strain

linear strain

35.

The state of pure shear stress is produced by

equal tension in two directions at right angles

equal compression in two directions at right angles

none of these

tension in one direction and equal compression in perpendicular direction

Strength of Materials MCQs Set-2

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