Strength of Materials MCQs Set-2

Page 1 of 4

1.

The volumetric strain is the ratio of the

original volume to the change in volume

original thickness to the change in thickness

change in thickness to the original thickness

change in volume to the original volume

2.

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

Stress

Young's modulus

None of these

Strain

3.

Which of the following are statically indeterminate beams?

b) Continuous beam

None of these

a) Fixed beam

Both (a) and (b)

4.

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

One-fourth

Double

Same amount

Half

5.

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

maximum shear stress

maximum strain energy

maximum shear strain energy

maximum principal stress

6.

A beam is said to be uniform strength if

the bending moment is the same throughout the beam

every horizontal plane

the deflection is the same throughout the beam

the shear stress is the same throughout the beam

7.

The thermal stress in a bar is directly proportional to

none of these

its volume

the change in temperature

its cross-sectional area

8.

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

Wood

Cast iron

Concrete

Lead

9.

Stress at the boundary of kern

maximum

minimum

any value

zero

10.

Neutral plane of a beam

None of these

Passes through the CG

Lies at bottom most fibre

Is one whose length remains unchanged during the deformation

Page 2 of 4

11.

Where are the steel bars in a concrete beam embedded?

Near bottom section

Near top section

In the centre

Uniformly

12.

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

Modulus of elasticity

None of these

Proof resilience

Resilience

13.

In curved beams the distribution of bending stress is

Uniform

Hyperbolic

Parabolic

Linear

14.

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

linear strain

lateral strain

volumetric strain

shear strain

15.

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

at a support

none of these

under the load only

always at the mid span

16.

The area under the stress-strain curve represents

energy required to cause failure

breaking strength of material

toughness of material

hardness of material

17.

Principle planes are planes having

none of these

maximum shear stress

no shear stress

minimum shear stress

18.

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

resilience

modulus of resilience

proof resilience

impact energy

19.

The shear stress at the centre of a circular shaft

zero

minimum

maximum

unpredictable

20.

The total strain energy stored in a body is termed as

modulus of resilience

impact energy

proof resilience

resilience

Page 3 of 4

21.

The neutral axis in curved beams

does not coincide

coincides with the geometric axis

lies at the top of the beam

lies at the bottom of the beam

22.

The state of pure shear stress is produced by

tension in one direction and equal compression in perpendicular direction

equal tension in two directions at right angles

none of these

equal compression in two directions at right angles

23.

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

malleability

ductility

toughness

resilience

24.

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

under the load

at the mid span

anywhere on the beam

at the supports

25.

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

unity

zero

none of these

infinity

26.

Proof stress is related to

fracture

elongation

yielding

necking

27.

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

no stresses

compressive stresses

thermal stresses

tensile stresses

28.

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

No stress

Tensile stress

thermal stresses

Bending

29.

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

same

less

unpredictable

more

30.

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

arc of a circle

cubic parabola

quadratic parabola

catenary

Page 4 of 4

31.

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

six

four

two

three

32.

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

Shear

Linear

Volumetric

Lateral

33.

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

None of these

Volumetric strain

Lateral strain

Shear strain

34.

Strain energy is the

energy stored in a body when strained within elastic limits

maximum strain energy which can be stored in a body

proof resilience per unit volume of a material

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

35.

The hoop stresses are acting across the

longitudinal section

none of these

circumferential section

radial section

Strength of Materials MCQs Set-2

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