Industrial and Product Design Industrial and Product Design Materials & Manufacturing 1 — Questions and Answers
Question 1: Which material property describes a material's ability to be drawn into a wire without breaking?
- Ductility (Correct answer)
- Hardness
- Brittleness
- Viscosity
Correct answer: Ductility
Ductility is the property that allows a material to deform plastically under tensile stress, enabling it to be drawn into a wire.
Question 2: In injection molding, what is the term for the channel through which molten material enters the mold cavity?
- Gate
- Sprue (Correct answer)
- Runner
- Ejector pin
Correct answer: Sprue
The sprue is the primary channel that delivers molten material from the injection unit into the runner system of the mold.
Question 3: Which manufacturing process uses a rotating cutting tool to remove material from a stationary workpiece?
- Turning
- Milling (Correct answer)
- Grinding
- Forging
Correct answer: Milling
Milling uses a rotating multi-point cutter to remove material from a stationary or slowly moving workpiece to create flat or complex surfaces.
Question 4: What does the term 'design for manufacturability' (DFM) primarily aim to achieve?
- Maximize aesthetic appeal
- Reduce production costs and simplify fabrication (Correct answer)
- Increase product weight
- Extend warranty periods
Correct answer: Reduce production costs and simplify fabrication
DFM is a design approach focused on simplifying the manufacturing process to reduce costs, defects, and production time.
Question 5: Which polymer type can be repeatedly melted and reshaped without significant chemical change?
- Thermoset
- Elastomer
- Thermoplastic (Correct answer)
- Composite
Correct answer: Thermoplastic
Thermoplastics soften when heated and harden when cooled, making them recyclable and suitable for injection molding processes.
Question 6: In CNC machining, what does the G-code command G00 typically represent?
- Feed rate override
- Rapid positioning movement (Correct answer)
- Tool change
- Coolant on
Correct answer: Rapid positioning movement
G00 is the rapid positioning command that moves the cutting tool at maximum speed to a specified coordinate without cutting.
Industrial and Product Design Industrial and Product Design Materials & Manufacturing 1
Which material property describes a material's ability to be drawn into a wire without breaking?