VEDA STRENGTH OF MATERIALS NEW

For a material having modulus of elasticity E and modulus of rigidity N, it is seen that E = 2 N. The bulk modulus K of the material is

• E/2

• E/3

• E/4

• 0

For a material with poisons ratio 0.25, the ratio of modulus of rigidity to modulus of elasticity will be

• 0.4

• 1.2

• 2.0

• 3.6

Which of the following statement/s is/are valid about Poisson's ratio:

• Always less than one

• Always greater than one

• Dimensionless

• Both A and C

Auxetic materials have --------- poisson ratio

(a)  

The Poisson's ratio for a certain material is zero. What is inferred from this statement?

• the material is rigid

• The material is elastic

• The material is ductile

• None

Two beams of equal cross-sectional area are subjected to equal bending moment. If one beam has a square cross-section and the other has a circular cross-section, then ______.

• both beam will be strong

• Circular section will be stronger

• Square section will be stronger

• None

In a simply supported beam, maximum shear stress in a triangular cross-section (altitude h) occurs at a distance of h/6 distance from neutral axis

• True
• False

• True
• False

A cylindrical tank with closed ends is filled with compressed air at a pressure of 500 kPa. The inner radius of the tank is 2 m. and it has wall thickness of 10 mm. The magnitude of maximum in-plane shear stress (in MPa) is

• 22

• 24

• 25

• 29

Consider the following statements with reference to a continuous beam supported at A, C and E for which shear force diagram is shown in the above figure. There is:

1. A concentrated load acting at point B.

2. A concentrated load acting at point D.

3. A uniformly distributed load acting on the portion CE.

Which of these statements are correct?

• 1, 2 and 3

• 1 and 2 only

• 2 and 3 only

• 1 and 3 only