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Lab Practical - MMET 281 - Manufacturing and Assembly Processes II - Texas A&M University - TAMU - Dr. Bhaskar Vajipeyajula Exam Questions And Answers $15.49
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Lab Practical - MMET 281 -
Manufacturing and Assembly Processes
II - Texas A&M University - TAMU - Dr.
Bhaskar Vajipeyajula Exam Questions
And Answers
Define: Heat Deflection - correct answer ✅The temperature at which a
polymer of plastic sample deforms under a specified load.
Why is heat deflection useful? - correct answer ✅Because it gives an
idea about how much of a load materials can withstand at elevated
temperatures
What are some products that would consider heat deflection in their
design? - correct answer ✅Tupperware containers
Microwave lining
Define: Melt Index (Plastic) - correct answer ✅Measure of the ease of
flow of the melt of a thermoplastic polymer.
Why is Melt Index important? - correct answer ✅It gives an idea about
how viscous a material is under a given load
When would you want a low MI plastic? - correct answer ✅For when
molds are producing more flash than expected
, Lab Practical - MMET 281 -
Manufacturing and Assembly Processes
II - Texas A&M University - TAMU - Dr.
Bhaskar Vajipeyajula Exam Questions
And Answers
When would you want a high MI plastic? - correct answer ✅For when
there are larger and more complex molds
What effect does a high MI plastic have on density? - correct answer
✅Lowers density
What effect does a high MI plastic have on impact resistance? - correct
answer ✅Lowers impact resistance
What effect does a high MI plastic have on flexural properties? - correct
answer ✅More flexibility
Why is it important to consider water absorption when processing a
plastic? - correct answer ✅Because moisture can cause a change in
product dimensions and material properties such as electrical
conductivity
How does one avoid the problems associated with water absorption
when processing a plastic? - correct answer ✅By applying a polymeric
coating which will significantly reduce the amount of moisture absorbed
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