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Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - JEE MCQ


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10 Questions MCQ Test - Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July)

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Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - Question 1

The slope of the stress-strain curve in the elastic deformation region is ____________

Detailed Solution for Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - Question 1

The elastic modulus is the ratio of stress and strain. So on the stress strain curve, it is the slope.

Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - Question 2

Which point on the stress strain curve occurs after the proportionality limit?

Detailed Solution for Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - Question 2

The curve will be stress strain proportional upto the proportionality limit. After these, the elastic limit will occur.

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Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - Question 3

Which point on the stress strain curve occurs after yield plateau?

Detailed Solution for Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - Question 3

After the yield plateau the curve will go up to its maximum limit of stress which is its ultimate point.

Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - Question 4
The impact strength of a material is an index of its
Detailed Solution for Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - Question 4
The ability of the material to withstand stress (resist fracture due to high-impact loads) without fracture is known as toughness. It is defined as the ability to absorb energy in the plastic state. The impact strength of a material is an index of its toughness.
Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - Question 5
Hooke's law holds good up to the limit of __________ .
Detailed Solution for Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - Question 5
Hooke’s law holds up to the proportional limit. Hooke’s law in terms of stress and strain is

The constant of proportionality is called the elastic modulus or Young’s modulus, E. It has the same units as stress. E is a property of the material used.
Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - Question 6
The plastic response (deformation) of a material to compressive force is known as:
Detailed Solution for Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - Question 6
Malleability is a material's ability to undergo deformation under compressive force without breaking or cracking, typically referring to the ability to be hammered or rolled into thin sheets. When a malleable material experiences a force, it responds by deforming instead of shattering. This quality is especially important in metalworking where metals are often subjected to high levels of compressive stress.
Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - Question 7
Modulus of rigidity is defined as:
Detailed Solution for Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - Question 7
Modulus of rigidity or shear modulus is defined as the ratio of shear stress to shear strain within the elastic limit.
Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - Question 8

In the given stress-strain curve of mild steel, DE represents:

Detailed Solution for Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - Question 8

In the given stress-strain curve for mild steel, DE represents strain hardening. Strain hardening is the stage where the material undergoes large deformation with a relatively small increase in applied load. This deformation is caused by the slippage of the material along oblique surfaces and is primarily due to shearing stresses.

Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - Question 9

Where is the necking region?

Detailed Solution for Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - Question 9

Necking is a tensile strain deformation which is cased in after the ultimate amount of stress occurs in the material.

Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - Question 10
If a piece of material neither expands nor contracts in volume when subjected to stresses, then the Poisson’s ratio must be
Detailed Solution for Test: Mechanical Properties of Solids - Introduction to stress and strain (28 July) - Question 10
If a material does not change in volume when subjected to stresses, then its Poisson's ratio must be 0.5. Poisson's ratio relates the lateral strain to the axial strain and is defined as the negative of the ratio of lateral strain to axial strain.
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