ME or MEng Master of Engineering Master of Engineering Computer-Aided Manufacturing 3

Question 1

What does the term 'process capability index Cpk' measure in statistical process control?

Accepted Answer

The degree to which a process is both centered and within specification limits

Answer

Cpk accounts for both process spread and mean shift relative to specification limits, indicating actual process capability.

Question 2

In robotic manufacturing cells, which sensor type is most effective for detecting surface defects on shiny metallic parts?

Accepted Answer

Structured light 3D scanners

Answer

Structured light scanning projects patterns onto surfaces and captures reflected geometry, enabling high-resolution defect detection even on reflective materials.

Question 3

Which STEP (Standard for the Exchange of Product model data) protocol is used to transfer CAD geometry between different software platforms?

Accepted Answer

STEP AP203

Answer

STEP AP203 (Application Protocol 203) defines the exchange of configuration-controlled 3D design data between CAD systems.

Question 4

In finite element analysis (FEA) for manufacturing, what is the effect of using a finer mesh near stress concentrations?

Accepted Answer

It increases solution accuracy by better capturing high stress gradients

Answer

Finer meshes near stress concentrations capture steep stress gradients more accurately, reducing discretization error.

Question 5

What manufacturing defect does the term 'chatter' refer to in milling operations?

Accepted Answer

Self-excited vibration causing poor surface finish and dimensional error

Answer

Chatter is regenerative self-excited vibration between tool and workpiece, producing wavy surfaces and accelerating tool wear.

ME or MEng Master of Engineering Practice Test

ME or MEng Master of Engineering Practice Test

ME or MEng Master of Engineering Master of Engineering Computer-Aided Manufacturing 3