SM 4

Within elastic limit, shear stress is.................. shear strain.

• less than

• inversely proportional to

• equal to

• directly proportional to

Shear modulus is the ratio of

• linear stress to linear strain

• linear stress to lateral strain

• volumetric strain to linear strain

• shear stress to shear strain

A localised compressive stress at the area of contact between two members is known as

• shear stress

• tensile stress

• crushing stress

• bending stress

The ratio of ultimate stress to allowable stress is called

• Factor of safety

• Possions ratio

• Modulus of rigidity

• Youngs Modulus

The maximum diameter of the hole that can be punched from a plate of maximum shear stress ¼ th of its maximum crushing stress of punch, is equal to Where t = Thickness of the plate

• 2t

• 8t

• t

• 4t

The principal plane is a plane on which the shear stress is

• minimum

• none of these

• zero

• maximum

The planes, which carry no shear stress, are known as principal planes.

• False

• True

When a body is subjected to a direct tensile stress (σ) in one plane, then normal stress on an oblique section of the body inclined at an angle Φ to the normal of the section is

• σcosɵ

• σsinɵ

When a body is subjected to a direct tensile stress (σ) in one plane, then normal stress on an oblique section of the body inclined at an angle Φ to the normal of the section

In the above question, the normal stress on an oblique section will be maximum, when ɵ is equal to

• 90°

• 45°

• 30°

• 0°

The direct stress, across a principal plane, is known as principal stress.

• Yes

• No