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Classification of mouthpieces is based on

15. Classification of mouthpieces is based on:

1. Material composition
2. Shape and size
3. Temperature range
4. Surface finish

Answer: B) Shape and size

Explanation:

Mouthpieces are devices used to control the flow of fluids, particularly liquids, from one point to another. Their classification is primarily based on their shape and size, as this factor greatly influences the flow characteristics and efficiency of the device.