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Listening Quiz: Thảo Luận Về Gia Công Vật Liệu Đàn Hồi Nhiệt Dẻo – Advanced Level
Th9 17, 2025
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bởi
Anna Phạm
trong
Tiếng Anh Hóa Học (English for Chemistry)
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1.
What is the main topic of the conversation?
The cost of producing industrial cooling systems
The repair of injection molding machines
The processing characteristics of a thermoplastic elastomer
The storage and shipment of finished plastic products
Explanation:
James and Emily discuss how the thermoplastic elastomer melts, flows, cools, and should be stored during processing.
2.
Why is quick cooling important during processing?
To keep the material’s shape
To make the material melt faster
To improve the machine’s speed
To increase the material’s moisture content
Explanation:
James says quick cooling is important to keep shape.
3.
What does James say about the elastomer’s flow characteristics?
It cannot be used in extrusion machines
It must be heated for a long time before it flows
It has high melt flow index, so it flows easily
It has low melt flow index and flows poorly
Explanation:
James states that the material has a high melt flow index, which means it flows easily.
4.
What can be inferred about the elastomer after processing?
It becomes brittle after several cycles
It requires special cooling only after storage
It keeps its elasticity well after repeated use
It must be stored in a wet environment
Explanation:
James says it retains good elasticity even after multiple cycles, so it remains elastic after processing.
5.
What does James recommend before processing the material?
Heat it to the highest possible temperature
Store it in direct sunlight
Keep it dry
Mix it with water
Explanation:
James advises Emily to keep it dry because moisture can cause defects.
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