ENG1001B Term 2: Tutorial Week 1

What kind of structure is depicted in the above?

• SC

• FCC

• BCC

• HCP

What kind of structure is denoted in the image?

• FCC

• BCC

• SC

• HCP

The coordination number of a hexagonal closed packed structure is ___.

The body-centred cubic structure has ___ atoms in the unit cell.

• 1

• 2

• 3

• 4

What kind of crystalline defect is shown in the image?

• self-interstitial

• substitutional impurity

• vacancy

• interfacial

What kind of crystalline defect is shown in the image?

• screw dislocation

• mix dislocation

• substitutional impurity

• edge dislocation

What kind of crystalline defect is shown in the image?

• line dislocation

• edge dislocation

• self-interstatial atoms

• grain boundary

A crystal structure experiences a shear stress. The defect most likely to form is a

• edge dislocation

• vacancy

• grain boundary

• screw dislocation

The magnitude and direction of lattice distortion associated with a dislocation are specified by its _______ vector.

Given the stress-strain curves in the picture, which material has the most ductile response?

• 1340 Steel

• Stainless steel (18-8)

• Aluminium alloy 2024-T81

• Structural steel (mild steel)

• Magnesium