BME Advanced Manufacturing 2

Question 1

In selective laser sintering (SLS), what material property is most critical for achieving dense, high-strength parts?

Accepted Answer

Particle size distribution

Answer

Particle size distribution directly affects packing density and energy absorption, determining final part density and strength in SLS.

Question 2

Which of the following best describes the role of cutting fluid in high-speed machining?

Accepted Answer

Reducing thermal damage and chip adhesion

Answer

Cutting fluids dissipate heat and lubricate the tool-chip interface, preventing built-up edge formation and thermal damage.

Question 3

What is the primary advantage of using a five-axis CNC machine over a three-axis machine?

Accepted Answer

Ability to machine complex contoured surfaces in fewer setups

Answer

Five-axis machines tilt the tool relative to the workpiece, enabling complex curved surfaces to be machined with fewer repositioning setups.

Question 4

In electrical discharge machining (EDM), material removal is achieved by:

Accepted Answer

Controlled electrical sparks eroding the workpiece

Answer

EDM removes material through rapid electrical discharges (sparks) between the electrode and workpiece, vaporizing small amounts of material.

Question 5

Which lean manufacturing waste category does excess inventory between production stages represent?

Accepted Answer

Overproduction

Answer

Excess inventory between stages is classified as overproduction waste, tying up capital and hiding process problems.

BME - Bachelor of Mechanical Engineering Practice Test