UPSC CSE Prelims
Question 3
Consider the following materials:
- Agricultural residues
- Corn grain
- Wastewater treatment sludge
- Wood mill waste
Which of the above can be used as feedstock for producing Sustainable Aviation Fuel?
View correct answer and explanation
Correct answer: C
Correct Option: C (1, 2, 3 and 4)
Explanation: Sustainable Aviation Fuel can be made from agricultural biomass, starch-derived ethanol, sewage sludge and wood-industry residues through suitable conversion pathways.
Statement / Pair / Item-wise Analysis:
1. Correct/True - Crop residues provide lignocellulosic biomass.
2. Correct/True - Corn starch can become ethanol for alcohol-to-jet fuel.
3. Correct/True - Organic wastewater sludge can be processed into fuel intermediates.
4. Correct/True - Sawdust and wood-mill residues are useful biomass feedstocks.
Option-wise Analysis:
A. Incorrect-omits correct item 3 (Organic wastewater sludge can be processed into fuel intermediates.); omits correct item 4 (Sawdust and wood-mill residues are useful biomass feedstocks.).
B. Incorrect-omits correct item 1 (Crop residues provide lignocellulosic biomass.); omits correct item 2 (Corn starch can become ethanol for alcohol-to-jet fuel.).
C. Correct-includes precisely the true/correct statements or pairs identified above.
D. Incorrect-omits correct item 2 (Corn starch can become ethanol for alcohol-to-jet fuel.).