Strength of Materials MCQs Set-2

Page 1 of 4

1.

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

four

three

six

two

2.

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

None of these

Shear strain

Lateral strain

Volumetric strain

3.

The thermal stress in a bar is directly proportional to

its cross-sectional area

none of these

the change in temperature

its volume

4.

Stress at the boundary of kern

any value

zero

maximum

minimum

5.

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

6.

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

always at the mid span

at a support

under the load only

none of these

7.

Where are the steel bars in a concrete beam embedded?

In the centre

Uniformly

Near top section

Near bottom section

8.

The state of pure shear stress is produced by

equal compression in two directions at right angles

equal tension in two directions at right angles

none of these

tension in one direction and equal compression in perpendicular direction

9.

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

Lateral

Linear

Volumetric

Shear

10.

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

maximum strain energy

maximum principal stress

maximum shear stress

maximum shear strain energy

Page 2 of 4

11.

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

Concrete

Wood

Cast iron

Lead

12.

The total strain energy stored in a body is termed as

resilience

impact energy

proof resilience

modulus of resilience

13.

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

Resilience

Modulus of elasticity

None of these

Proof resilience

14.

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

Bending

thermal stresses

Tensile stress

No stress

15.

Strain energy is the

proof resilience per unit volume of a material

maximum strain energy which can be stored in a body

energy stored in a body when strained within elastic limits

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

16.

In curved beams the distribution of bending stress is

Linear

Uniform

Hyperbolic

Parabolic

17.

The hoop stresses are acting across the

none of these

radial section

circumferential section

longitudinal section

18.

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

at the supports

under the load

at the mid span

anywhere on the beam

19.

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

resilience

toughness

malleability

ductility

20.

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

none of these

unity

zero

infinity

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21.

Proof stress is related to

elongation

fracture

yielding

necking

22.

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

None of these

Young's modulus

Strain

Stress

23.

The shear stress at the centre of a circular shaft

minimum

zero

maximum

unpredictable

24.

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

25.

The neutral axis in curved beams

coincides with the geometric axis

lies at the top of the beam

lies at the bottom of the beam

does not coincide

26.

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

impact energy

modulus of resilience

resilience

proof resilience

27.

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

no stresses

thermal stresses

tensile stresses

compressive stresses

28.

The area under the stress-strain curve represents

toughness of material

breaking strength of material

energy required to cause failure

hardness of material

29.

The volumetric strain is the ratio of the

change in thickness to the original thickness

change in volume to the original volume

original thickness to the change in thickness

original volume to the change in volume

30.

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

Double

One-fourth

Half

Same amount

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31.

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

same

unpredictable

less

more

32.

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

shear strain

lateral strain

linear strain

volumetric strain

33.

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

arc of a circle

cubic parabola

catenary

quadratic parabola

34.

Principle planes are planes having

no shear stress

none of these

maximum shear stress

minimum shear stress

35.

Which of the following are statically indeterminate beams?

b) Continuous beam

a) Fixed beam

None of these

Both (a) and (b)

Strength of Materials MCQs Set-2

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