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UPSC PYQPrelims 2020

Civil Services Examination · Question 78

In rural road construction, the use of which of the following is preferred for ensuring environmental sustainability or to reduce carbon footprint? 1. Copper slag 2. Cold mix asphalt technology 3. Geotextiles 4. Hot mix asphalt technology 5. Portland cement Select the correct answer using the code given below:

  1. 1, 2 and 3 only
  2. 2, 3 and 4 only
  3. 4 and 5 only
  4. 1 and 5 only
Show answer & explanation

Answer: (A) 1, 2 and 3 only

Explanation

PMGSY green guidelines promote waste materials like copper slag, cold-mix asphalt (no heating) and geotextiles. Hot-mix asphalt and Portland cement are energy-intensive.