The GATE Grind

GATE 2025 ES – Question 28

Solid and Hazardous Waste Management · Special Waste Streams · 1 mark · Multiple select

Which statements about plastic waste management are correct?

  1. Plastic waste may be burnt to generate fuel oil and fuel gas.
  2. Plastic waste with bitumen may be used for road construction.
  3. PET and HDPE are among the most common recycled plastics.
  4. Plastics made of branched monomers can be easily recycled.

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Show answer and explanation

Correct answer: (B) Plastic waste with bitumen may be used for road construction.; (C) PET and HDPE are among the most common recycled plastics.

Explanation

Suitable plastic fractions can be incorporated into bituminous pavement, and PET/HDPE are common recycling streams, so B and C are true. Fuel oil/gas production involves pyrolysis or controlled conversion, not simply burning as A states. Branching alone does not guarantee easy recycling; polymer type, crosslinking and contamination matter. Select **B, C**.

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