Stress and Strain Concepts

How many types of strain are there?

• One

• Two

• Three

• Four

Is strain a dimensionless quantity?

• Yes, strain is a dimensionless quantity and has no unit.

• No, strain is measured in units of length.

• Yes, strain is a quantity with specific units.

• No, strain is a ratio of force to area.

What is the formula for strain?

• Strain, ε = ∆L / L.

• Strain, ε = L / ∆L.

• Strain, ε = ∆L × L.

• Strain, ε = L - ∆L.

what is poissons ratio

• It is the ratio of relative contraction to relative expansion.

• It is the ratio of lateral strain to longitudinal strain.

• It is denoted by the symbol µ and is a measure of material elasticity.

• It is defined as the ratio of relative contraction (lateral strain) to relative expansion (longitudinal strain).

What is strain?

• Strain measures how much an object is stretched or deformed when a force is applied.

• Strain is the amount of energy stored in an object when it is compressed.

• Strain refers to the temperature change in a material when exposed to heat.

• Strain is the speed at which an object moves when a force is applied.

What is the dimension of stress?

• [ML1T–2]

• [M1L1T–1]

• [M1L2T–2]

• [M1L1T0]

which is more elastic?

• Rubber

• Wood

• Steel

• Plastic

What is the SI unit of stress?

• N m–2

• Pascal (Pa)

• Newton (N)

• Joule (J)

What is Reynolds number?

• A measure of the flow rate of a fluid through a pipe.

• A critical variable that decides whether the flow of a fluid through a cylindrical pipe is streamlined or turbulent.

• A unit of measurement for fluid viscosity.

• A formula used to calculate the pressure drop in a pipe.

what is Hooks law

• Hooke’s law states that for a small deformation within the elastic limit, the strain produced in a body is directly proportional to the stress that produces it.

• Hooke’s law states that the stress in a material is inversely proportional to the strain experienced by it.

• Hooke’s law states that the total deformation of a body is equal to the sum of the individual deformations of its parts.

• Hooke’s law states that the force applied to a spring is equal to the spring constant multiplied by the displacement of the spring.