You want to print a functional mechanical part that requires toughness and chemical resistance. Why is PETG a good choice?

hard📝 Conceptual Q8 of 15

3D Printing - Materials for 3D Printing

ABecause PETG is the cheapest filament available

BBecause PETG combines impact resistance with good chemical resistance

CBecause PETG melts at very low temperatures making it easy to print

DBecause PETG is very rigid and brittle

Step-by-Step Solution

Solution:

Step 1: Identify key requirements for the mechanical part
The part needs toughness and chemical resistance to function well under stress and exposure.
Step 2: Match PETG properties to requirements
PETG is known for impact resistance (toughness) and good chemical resistance, making it suitable.
Step 3: Eliminate incorrect options
Cost and melting point are not primary reasons; PETG is not brittle but flexible.
Final Answer:
Because PETG combines impact resistance with good chemical resistance -> Option B
Quick Check:
Toughness + chemical resistance = A [OK]

Quick Trick: PETG is tough and chemical resistant for functional parts [OK]

Common Mistakes:

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