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UPSC CSE Prelims 2024 — Science & Technology Questions with Answers

All 12 Science & Technology previous-year questions from UPSC CSE Prelims 2024, each with the correct answer and a full explanation. Practise them as a free, timed mock test with instant scoring.

1. Q1.Science & Technology

   Consider the following: 1. Battery storage 2. Biomass generators 3. Fuel cells 4. Rooftop solar photovoltaic units How many of the above are considered "Distributed Energy Resources"?

   • a)Only one
   • b)Only two
   • c)Only three
   • d)All four
2. Q2.Science & Technology

   Consider the following materials: 1. Agricultural residues 2. Corn grain 3. Wastewater treatment sludge 4. Wood mill waste Which of the above can be used as feedstock for producing Sustainable Aviation Fuel?

   • a)1 and 2 only
   • b)3 and 4 only
   • c)1, 2, 3 and 4
   • d)1, 3 and 4 only
3. Q3.Science & Technology

   Which one of the following words/phrases is most appropriately used to denote "an interoperable network of 3D virtual worlds that can be accessed simultaneously by millions of users, who can exert property rights over virtual items"?

   • a)Big data analytics
   • b)Cryptography
   • c)Metaverse
   • d)Virtual matrix
4. Q4.Science & Technology

   With reference to radioisotope thermoelectric generators (RTGs), consider the following statements: 1. RTGs are miniature fission reactors. 2. RTGs are used for powering the onboard systems of spacecrafts. 3. RTGs can use Plutonium-238, which is a by-product of weapons development. Which of the statements given above are correct?

   • a)1 and 2 only
   • b)2 and 3 only
   • c)1 and 3 only
   • d)1, 2 and 3
5. Q5.Science & Technology

   Consider the following statements: Statement-I: Giant stars live much longer than dwarf stars. Statement-II: Compared to dwarf stars, giant stars have a greater rate of nuclear reactions. Which one of the following is correct in respect of the above statements?

   • a)Both Statement-I and Statement-II are correct and Statement-II explains Statement-I
   • b)Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I
   • c)Statement-I is correct, but Statement-II is incorrect
   • d)Statement-I is incorrect, but Statement-II is correct
6. Q6.Science & Technology

   Which one of the following is synthesised in human body that dilates blood vessels and increases blood flow?

   • a)Nitric oxide
   • b)Nitrous oxide
   • c)Nitrogen dioxide
   • d)Nitrogen pentoxide
7. Q7.Science & Technology

   Consider the following activities: 1. Identification of narcotics on passengers at airports or in aircraft 2. Monitoring of precipitation 3. Tracking the migration of animals In how many of the above activities can the radars be used?

   • a)Only one
   • b)Only two
   • c)All three
   • d)None
8. Q8.Science & Technology

   Consider the following aircraft: 1. Rafale 2. MiG-29 3. Tejas MK-1 How many of the above are considered fifth generation fighter aircraft?

   • a)Only one
   • b)Only two
   • c)All three
   • d)None
9. Q9.Science & Technology

   In which of the following are hydrogels used? 1. Controlled drug delivery in patients 2. Mobile air-conditioning systems 3. Preparation of industrial lubricants Select the correct answer using the code given below:

   • a)1 only
   • b)1 and 2 only
   • c)2 and 3 only
   • d)1, 2 and 3
10. Q10.Science & Technology

    Which one of the following is the exhaust pipe emission from Fuel Cell Electric Vehicles, powered by hydrogen?

    • a)Hydrogen peroxide
    • b)Hydronium
    • c)Oxygen
    • d)Water vapour
11. Q11.Science & Technology

    Recently, the term "pumped-storage hydropower" is actually and appropriately discussed in the context of which one of the following?

    • a)Irrigation of terraced crop fields
    • b)Lift irrigation of cereal crops
    • c)Long duration energy storage
    • d)Rainwater harvesting system
12. Q12.Science & Technology

    "Membrane Bioreactors" are often discussed in the context of:

    • a)Assisted reproductive technologies
    • b)Drug delivery nanotechnologies
    • c)Vaccine production technologies
    • d)Wastewater treatment technologies