Strength of Materials Test 1

Question 1
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What is the primary focus of Strength of Materials?

A
Thermal properties

B
Stress and strain analysis

C
Material composition

D
Fluid dynamics

Question 2
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What is tensile stress?

A
The ratio of original length to the change in length

B
The ratio of change in length to the tensile force applied

C
The ratio of tensile force to the change in length

D
The ratio of change in length to the original length

Question 3
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A rod 200 cm long is subjected to an axial pull due to which it elongates about 2 mm. Calculate the amount of strain?

A
0.01

B
0.002

C
0.01

D
0.001

Question 4
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Which law is also called as the elasticity law?

A
Poisson’s law

B
Bernoulli’s law

C
Stress law

D
Hooke’s law

Question 5
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What is the factor of safety?

A
The ratio of stress to strain

B
The ratio of ultimate stress to the permissible stress

C
The ratio of permissible stress to the ultimate stress

D
The ratio of longitudinal strain to stress

Question 6
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If 10 coils of a spring cut out from a spring of 25 coils, then the stiffness of new spring will be

A
Same as the original spring

B
1.25 times the original spring

C
2.5 times the original spring

D
0.4 times the original spring

Question 7
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Where in the stress-strain curve, the Hooke’s law is valid?

A
Elastic range

B
Valid everywhere

C
Necking region

D
Strain hardening region

Question 8
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What will be the value of Poisson’s ratio if G/K = 0.6

A
0.23-0.27

B
0.234-0.271

C
0.237-0.276

D
0.239-0.272

Question 9
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What is creep?

A
Gradual increase of plastic strain with time at varying load

B
Gradual increase of elastic strain with time at varying load

C
Gradual increase of plastic strain with time at constant load

D
Gradual increase of elastic strain with time at constant load

Question 10
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Which stress occurs when there is an eccentric load applied?

A
Thermal stress

B
Tensile stress

C
Bending stress

D
Shear stress

Question 11
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What is the bulk modulus of elasticity?

A
The ratio of volumetric stress to volumetric strain

B
The ratio of shear stress to shear strain

C
The ratio of direct stress to direct strain

D
The ratio of direct stress to volumetric strain

Question 12
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If the equivalent bending moment in a shaft is 500 Nm and the torque acting is 300 Nm. The magnitude of the bending moment is

A
455 Nm

B
954 Nm

C
160 Nm

D
400 Nm

Question 13
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Which of the following is true if the value of Poisson’s ratio is zero?

A
The material is perfectly plastic

B
There is no longitudinal strain in the material

C
The material is rigid

D
The longitudinal strain in the material is infinite

Question 14
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The yield stress of steel in both tension and compression is 250 MPa and poisson’s ratio(μ) is 0.25. It is subjected to principal stresses of 120 MPa (Tensile), 60 MPa (Tensile) and 30 MPa (compressive). The factor of safety (FOS) according to the maximum strain energy theory is _______ ( up to 3 decimal places)

A
1.863-1.863

B
1.8634-1.8631

C
1.8637-1.8636

D
1.8639-1.8632

Question 15
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E, G, K, and μ represent the elastic modulus, shear modulus, bulk modulus, and Poisson’s ratio, respectively. To express the stress-strain relations completely for this material, at least __________

A
Any two of the four must be known

B
All the four must be known

C
E, K, and μ must be known

D
E, G, and μ must be known

Question 16
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Which type of stress does in a reinforcement bar is taken by the concrete?

A
Compressive stress

B
Bending stress

C
Tensile stress

D
Shear stress

Question 17
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A copper tube of 50 mm diameter and 1000 mm length having a thickness of 2 mm is closed at the ends and filled with a fluid of bulk modulus 2 × 10⁶ MPa. The extra amount of fluid that can be pumped is the tube for a maximum pressure increase of 50 MPa is (correct to 2 decimal place) ______ cc.

A
23.30-23.45

B
23.304-23.451

C
23.307-23.456

D
23.309-23.452

Question 18
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Which stress comes when there is an eccentric load applied?

A
Bending stress

B
Shear stress

C
Tensile stress

D
Thermal stress

Question 19
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What is the process of heating the metal in the furnace to a temperature slightly above the upper critical temperature and cooling slowly in the furnace?

A
Tampering

B
Quenching

C
Normalizing

D
Annealing

Question 20
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A carpenter glues a pair of cylindrical wooden logs by bonding their end faces at an angle of θ = 30° as shown in the figure.

The glue used at the interface fails if

Criterion 1: the maximum normal stress exceeds 2.5 MPa.

Criterion 2: the maximum shear stress exceeds 1.5 MPa.

Assume that the interface fails before the logs fail. When a uniform tensile stress of 4 MPa is applied, the interface

A
fails only because of criterion 1

B
fails only because of criterion 2

C
fails because of both criteria 1 and 2

D
does not fail

Question 21
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Which of the following materials is most likely to fail in shear?

A
Wood

B
Concrete

C
Rubber

D
Steel

Question 22
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What is the primary failure mode for ductile materials?

A
Brittle fracture

B
Yielding

C
Shear failure

D
Fatigue

Question 23
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What happens to the tensile strength of a material as temperature increases?

A
It remains constant

B
It decreases

C
It fluctuates

D
It increases

Question 24
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What is shear stress?

A
Force per unit area acting perpendicular to the surface

B
The product of stress and strain

C
The change in shape due to applied load

D
Force per unit area acting parallel to the surface

Question 25
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Which of the following stresses is produced due to axial loads?

A
Bending stress

B
Tensile and compressive stress

C
Shear stress

D
Thermal stress

Submit Test

Strength of Mat...

Question 1

Thermal properties

Stress and strain analysis

Material composition

Fluid dynamics

Question 2

The ratio of original length to the change in length

The ratio of change in length to the tensile force applied

The ratio of tensile force to the change in length

The ratio of change in length to the original length

Question 3

0.01

0.002

0.01

0.001

Question 4

Poisson’s law

Bernoulli’s law

Stress law

Hooke’s law

Question 5

The ratio of stress to strain

The ratio of ultimate stress to the permissible stress

The ratio of permissible stress to the ultimate stress

The ratio of longitudinal strain to stress

Question 6

Same as the original spring

1.25 times the original spring

2.5 times the original spring

0.4 times the original spring

Question 7

Elastic range

Valid everywhere

Necking region

Strain hardening region

Question 8

0.23-0.27

0.234-0.271

0.237-0.276

0.239-0.272

Question 9

Gradual increase of plastic strain with time at varying load

Gradual increase of elastic strain with time at varying load

Gradual increase of plastic strain with time at constant load

Gradual increase of elastic strain with time at constant load

Question 10

Thermal stress

Tensile stress

Bending stress

Shear stress

Question 11

The ratio of volumetric stress to volumetric strain

The ratio of shear stress to shear strain

The ratio of direct stress to direct strain

The ratio of direct stress to volumetric strain

Question 12

455 Nm

954 Nm

160 Nm

400 Nm

Question 13

The material is perfectly plastic

There is no longitudinal strain in the material

The material is rigid

The longitudinal strain in the material is infinite

Question 14

1.863-1.863

1.8634-1.8631

1.8637-1.8636

1.8639-1.8632

Question 15

Any two of the four must be known

All the four must be known

E, K, and μ must be known

E, G, and μ must be known

Question 16

Compressive stress

Bending stress

Tensile stress