UPSC solved previous year questions

UPSC Defence PYQ with Answers

7 solved Defence questions from previous UPSC papers, each with an answer and explanation.

Questions
7
Years covered
2016–2026
Exam years
5
With answers
7

Defence questions by year

UPSC Defence PYQ with Answers

1–2 of 2
  1. Q1 2025 Prelims GS

    What is the common characteristic of the chemical substances generally known as CL-20, HMX and LLM-105, which are sometimes talked about in media?

    1. These are alternatives to hydrofluorocarbon refrigerants
    2. These are explosives in military weaponsβœ“
    3. These are high-energy fuels for cruise missiles
    4. These are fuels for rocket propulsion
    Answer explanation

    These are explosives in military weapons CL-20, HMX, and LLM-105 are all high-energy chemical compounds used as explosives in military ordnance and weapons systems, valued for their high energy density and (in the case of insensitive…

    DefenceExplosivesScience and technology
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  2. Q2 2025 Prelims GS

    With reference to India's defence, consider the following pairs (Aircraft type : Description): I. Dornier-228 : Maritime patrol aircraft II. IL-76 : Supersonic combat aircraft III. C-17 Globemaster III : Military transport aircraft. How many of the above pairs are correctly matched?

    1. Only one
    2. Only twoβœ“
    3. All the three
    4. None
    Answer explanation

    Only two The Dornier-228 is indeed used as a maritime patrol/light transport aircraft (I correct), and the C-17 Globemaster III is a large military transport aircraft (III correct).…

    AircraftDefenceIndian air force
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