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GATE 2022 PI – Question 16

Manufacturing Processes I · Polymers and Composites · 1 mark · Multiple choice

In injection blow molding of plastic beverage bottles, blowing is accomplished using what medium?

  1. Hot water
  2. Hot air
  3. Hot oil
  4. Alcohol

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Show answer and explanation

Correct answer: (B) Hot air

Explanation

Pressurized air inflates the heated preform against the mold cavity. Among the supplied media this is **hot air, B**.

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