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QUESTION: 1

According to St. Venant’s principle

Solution:

QUESTION: 2

Notched bar tests are frequently used for testing the

Solution:

Notched bar test- Impact Strength of a Material

Indentation Test- Hardness of a Material

The machinability rating is determined by measuring the weighted averages of the normal cutting speed, surface finish, and tool life for each material.

Salt Spray/Fog Test- Corrosion resistance of the material.

QUESTION: 3

In the creep test, the following type of stress is applied to the specimen

Solution:

QUESTION: 4

A free bar of length / is uniformly heated from 0°C to a temperature t°C, α is the coefficient of linear expansion and E is the modulus of elasticity. The stress in the bar is

Solution:

Since the bar is free to expand, no stresses will be developed in the bar.

QUESTION: 5

A test specimen is stressed slightly beyond the yield point and then unloaded. Its yield strength

Solution:

QUESTION: 6

Cup-and-cone type fracture occurs in the case of

Solution:

QUESTION: 7

Materials having elongation less than 5% are considered brittle. In such cases, factor of safety is based on

Solution:

QUESTION: 8

A rod of length 'l’ and cross-sectional area ‘A’ rotates about an axis passing through one end of the rod. The extension produced in the rod due to centrifugal forces is (w is the weight of the rod per unit length and ω is the angular velocily of rotation of the rod)

Solution:

QUESTION: 9

Young’s modulus of elasticity and Poisson’s ratio of a material are 1.25 x 10^{5} MPa and 0.34 respectively. The modulus of rigidity of the material is

Solution:

= 0.4664 x 10^{5} MPa

QUESTION: 10

In a homogeneous, isotropic elastic material, the modulus of elasticity E in terms of G and K is equal to

Solution:

### Properties of Metals, Stress-Strain & Elastic Constants

Doc | 13 Pages

### Elastic Constants

Doc | 3 Pages

- Test: Properties of Metals, Simple Stress Strain & Elastic Constants - 2
Test | 10 questions | 30 min

- Test: Properties of Metals, Simple Stress Strain & Elastic Constants - 3
Test | 20 questions | 60 min

- Test: Properties of Metals, Simple Stress Strain & Elastic Constants - 1
Test | 10 questions | 30 min

- Test: Stress-Strain Relations & Elastic Constants - 2
Test | 10 questions | 30 min

- Test: Stress-Strain Relations & Elastic Constants - 1
Test | 10 questions | 30 min