ME Material Properties and Testing 2

Question 1

Young's modulus (elastic modulus) is a measure of a material's:

Accepted Answer

Stiffness under elastic loading

Answer

Resistance to plastic deformation

Answer

Resistance to fracture

Answer

Ductility

Question 2

Poisson's ratio relates which two quantities in a material under uniaxial stress?

Accepted Answer

Axial strain and lateral strain

Answer

Stress and hardness

Answer

Thermal expansion and stress

Answer

Yield stress and fracture stress

Question 3

Which non-destructive testing (NDT) method is best suited for detecting internal cracks in a metal component?

Accepted Answer

Ultrasonic testing

Answer

Liquid penetrant testing

Answer

Magnetic particle testing

Answer

Visual inspection

Question 4

The 0.2% offset yield strength is used because many materials:

Accepted Answer

Have no clear yield point

Answer

Fracture at exactly 0.2% strain

Answer

Show no proportional limit

Answer

Exhibit large Luders bands

Question 5

In materials testing, the term 'gauge length' refers to:

Accepted Answer

The measured portion of the specimen in a tensile test

Answer

The total length of the specimen

Answer

The diameter of the specimen

Answer

The grip length

Question 6

Which property describes a material's ability to return to its original shape after the load is removed?

Accepted Answer

Elasticity

Answer

Plasticity

Answer

Toughness

Answer

Creep resistance