Attempt this previous-year question. The correct option stays hidden until you choose.
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. Portlant cement
Select the correct answer using the code given below:
Pick an option to check yourself.
• Correct Answer: A
• Copper slag (industrial byproduct) replaces natural aggregates; cold mix asphalt reduces energy use and emissions by 40–60%; geotextiles reduce aggregate needs and prevent erosion.
• Wrong options are incorrect: hot mix asphalt is energy-intensive (160–190°C); Portland cement production is a major CO2 emitter.
Attempt Prelims MCQs or open Mains questions by paper — then continue the same bank inside the app with visual decks.
GyanGram