When heat is applied or when a catalyst is added to _________________________ plastics undergo an irreversible chemical change.
Correct Answer:
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Q4: Over 90 percent of all steel produced
Q5: Plastics are classified as either thermosetting or
Q6: Thermoplastics soften or liquefy and flow when
Q7: Chromium vanadium steels are best known for
Q8: The acronym AISI stands for _.
A) American
Q10: When copper is added to steel, it
Q11: In a steel specification AISI 4460, the
Q12: Molybdenum increases _.
A) flexibility
B) hardness
C) melting temperature
D)
Q13: The specific type of steel best known
Q14: Which acts as a toughener when added
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