ME or MEng Master of Engineering Structural Analysis and Materials Science

Question 1

Hooke's Law states that stress is proportional to strain within the:

Accepted Answer

Elastic limit

Answer

Hooke's Law (σ = Eε) holds only within the elastic limit, where deformation is fully recoverable upon load removal.

Question 2

The moment of inertia of a rectangular cross-section (width b, height h) about its centroidal axis is:

Accepted Answer

bh³/12

Answer

The second moment of area for a rectangle about its centroidal axis is I = bh³/12, used in beam bending calculations.

Question 3

In beam theory, the neutral axis is the location where:

Accepted Answer

Bending stress is zero

Answer

The neutral axis is the centroidal axis of the cross-section where bending stress is zero; material above and below carries tension or compression.

Question 4

Poisson's ratio for a material is defined as:

Accepted Answer

Negative ratio of lateral strain to axial strain

Answer

Poisson's ratio ν = −ε_lateral/ε_axial describes the lateral contraction that accompanies axial elongation in an elastic material.

Question 5

Euler's critical buckling load formula for a column is P_cr =:

Accepted Answer

π²EI / (KL)²

Answer

Euler's formula P_cr = π²EI/(KL)² gives the axial load at which a slender column buckles, where KL is the effective length.

ME or MEng Master of Engineering Practice Test