Defence & Nuclear Technology PYQs

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1. Prelims 2026Q45Defence & Nuclear Technology

   The Bureau of Indian Standard (BIS) recently introduced a national standard to test and assess bomb disposal system. Which of the following statements with regard to this system is/are correct ?

   1.The new standard is known as IS 19445 : 2025.

   2.It will improve interoperability of equipment across agencies.

   3.It was developed by TBRL, DRDO in collaboration with the 30th Central Scientific Research Institute, Russia.

   Select the answer using the code given below :

   a1, 2 and 3b2 and 3 onlyc1 and 2 onlyd1 only
2. Prelims 2026Q68Defence & Nuclear Technology

   Which of the following statements with regard to stealth technology is/are correct ?

   1.Stealth objects have a very small radar cross-section and are coated with Radar Absorbing Material.

   2.Stealth objects can be detected using specific frequencies.

   3.Stealth objects are coated with metamaterials to increase the scattering of electromagnetic radiation.

   Select the answer using the code given below :

   a1 onlyb2 and 3 onlyc1 and 2 onlyd1, 2 and 3
3. Prelims 2026Q72Defence & Nuclear Technology

   Which of the following statements with regard to drone swarms is/are correct ?

   1.They use Terahertz band of frequency to communicate with the command centre.

   2.Individual drones in the swarm can communicate with other drones in the swarm.

   3.GPS Spoofing is a commonly used technique to counter drone swarm attack.

   Select the answer using the code given below :

   a1 onlyb2 and 3 onlyc1 and 2 onlyd1, 2 and 3
4. Prelims 2026Q85Defence & Nuclear Technology

   Consider the following statements about Mission Sudarshan Chakra of India :

   1.It aims to enhance India’s air defence, ballistic missile defence and aerial offensive capabilities.

   2.This Mission is being designed to enhance rapid, precise, and powerful defence responses, reinforcing India’s strategic autonomy.

   3.One of the aims of this Mission is to cover all public places of India by an expanded nationwide security shield by 2035.

   Which of the statements given above is/are correct ?

   a1, 2 and 3b1 and 2 onlyc2 and 3 onlyd1 only
5. Prelims 2026Q93Defence & Nuclear Technology

   Which of the following items of defence hardware is/are manufactured in India ?

   1.Su-30 MKI Fighter Jets

   2.T-90 MK-III Tanks

   3.Akula Class Submarine

   Select the answer using the code given below :

   a1 and 2b1 and 3c1 onlyd2 only
6. Prelims 2025Q46Defence & Nuclear Technology

   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?

   aThese are alternatives to hydrofluorocarbon refrigerantsbThese are explosives in military weaponscThese are high-energy fuels for cruise missilesdThese are fuels for rocket propulsion
7. Prelims 2025Q84Defence & Nuclear Technology

   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 pairs given above are correctly matched?

   aOnly onebOnly twocAll the threedNone
8. Prelims 2024Q35Defence & Nuclear Technology

   Consider the following aircraft :

   1.Rafael

   2.MiG-29

   3.Tejas MK-1

   How many of the above are considered fifth generation fighter aircraft ?

   aOnly onebOnly twocAll threedNone
9. Prelims 2023Q11Defence & Nuclear Technology

   Consider the following statements :

   Statement–I :

   India, despite having uranium deposits, depends on coal for most of its electricity production.

   Statement–II :

   Uranium, enriched to the extent of at least 60%, is required for the production of electricity.

   Which one of the following is correct in respect of the above statements?

   aBoth Statement–I and Statement–II are correct and Statement–II is the correct explanation for Statement–IbBoth Statement–I and Statement–II are correct and Statement–II is not the correct explanation for Statement–IcStatement–I is correct but Statement–II is incorrectdStatement–I is incorrect but Statement–II is correct
10. Prelims 2023Q58Defence & Nuclear Technology

    Consider the following statements :

    1.Ballistic missiles are jet-propelled at subsonic speeds throughout their flights, while cruise missiles are rocket-powered only in the initial phase of flight.

    2.Agni-V is a medium-range supersonic cruise missile, while BrahMos is a solid-fuelled intercontinental ballistic missile.

    Which of the statements given above is/are correct?

    a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2
11. Prelims 2022Q34Defence & Nuclear Technology

    Which one of the following statements best reflects the idea behind the “Fractional Orbital Bombardment System” often talked about in media ?

    aA hypersonic missile is launched into space to counter the asteroid approaching the Earth and explode it in space.bA spacecraft lands on another planet after making several orbital motions.cA missile is put into a stable orbit around the Earth and deorbits over a target on the Earth.dA spacecraft moves along a comet with the same speed and places a probe on its surface.
12. Prelims 2020Q55Defence & Nuclear Technology

    In India, why are some nuclear reactors kept under “IAEA Safeguards” while others are not ?

    aSome use uranium and others use thoriumbSome use imported uranium and others use domestic suppliescSome are operated by foreign enterprises and others are operated by domestic enterprisesdSome are State-owned and others are privately-owned
13. Prelims 2018Q33Defence & Nuclear Technology

    In the Indian context, what is the implication of ratifying the 'Additional Protocol' with the 'International Atomic Energy Agency (IAEA)' ?

    aThe civilian nuclear reactors come under IAEA safeguards.bThe military nuclear installations come under the inspection of IAEA.cThe country will have the privilege to buy uranium from the Nuclear Suppliers Group (NSG).dThe country automatically becomes a member of the NSG.
14. Prelims 2018Q43Defence & Nuclear Technology

    What is “Terminal High Altitude Area Defense (THAAD)”, sometimes seen in the news ?

    aAn Israeli radar systembIndia’s indigenous anti-missile programmecAn American anti-missile systemdA defence collaboration between Japan and South Korea
15. Prelims 2016Q46Defence & Nuclear Technology

    Which one of the following is the best description of 'INS Astradharini', that was in the news recently?

    aAmphibious warfare shipbNuclear-powered submarinecTorpedo launch and recovery vesseldNuclear-powered aircraft carrier
16. Prelims 2016Q79Defence & Nuclear Technology

    India is an important member of the 'International Thermonuclear Experimental Reactor'. If this experiment succeeds, what is the immediate advantage for India?

    aIt can use thorium in place of uranium for power generationbIt can attain a global role in satellite navigationcIt can drastically improve the efficiency of its fission reactors in power generationdIt can build fusion reactors for power generation
17. Prelims 2014Q37Defence & Nuclear Technology

    With reference to Agni–IV Missile, which of the following statements is/are correct?

    1.It is a surface-to-surface missile.

    2.It is fuelled by liquid propellant only.

    3.It can deliver one-tonne nuclear warheads about 7500 km away.

    Select the correct answer using the code given below.

    a1 onlyb2 and 3 onlyc1 and 3 onlyd1, 2 and 3
18. Prelims 2012Q61Defence & Nuclear Technology

    To meet its rapidly growing energy demand, some opine that India should pursue research and development on thorium as the future fuel of nuclear energy. In this context, what advantage does thorium hold over uranium?

    1.Thorium is far more abundant in nature than uranium.

    2.On the basis of per unit mass of mined mineral, thorium can generate more energy compared to natural uranium.

    3.Thorium produces less harmful waste compared to uranium.

    Which of the statements given above is/are correct?

    a1 onlyb2 and 3 onlyc1 and 3 onlyd1, 2 and 3
19. Prelims 2011Q32Defence & Nuclear Technology

    The function of heavy water in a nuclear reactor is to

    aSlow down the speed of neutronsbIncrease the speed of neutronscCool down the reactordStop the nuclear reaction
20. Prelims 2009Q8Defence & Nuclear Technology

    Consider the following statements:

    1.INS Sindhughosh is an aircraft carrier.

    2.INS Viraat is a submarine.

    Which of the statements given above is/are correct?

    a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2
21. Prelims 2009Q136Defence & Nuclear Technology

    In the context of Indian defence, consider the following statements :

    1.The Shourya missile flies with a speed of more than 8 Mach.

    2.The range of Shourya missile is more than 1600 km.

    Which of the statements given above is/are correct ?

    a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2
22. Prelims 2008Q19Defence & Nuclear Technology

    From which one of the following did India buy the Barak anti-missile defence systems?

    aIsraelbFrancecRussiadUSA
23. Prelims 2008Q85Defence & Nuclear Technology

    In the year 2007, an earthquake led to massive radioactive water leakage in the largest nuclear plant in the world. In which country did it occur?

    aGermanybCanadacJapandUSA
24. Prelims 2008Q88Defence & Nuclear Technology

    In which one of the following locations is the International Thermonuclear Experimental Reactor (ITER) project to be built?

    aNorthern SpainbSouthern FrancecEastern GermanydSouthern Italy
25. Prelims 2008Q130Defence & Nuclear Technology

    In the context of the Indian defence, what is ‘Dhruv’?

    aAircraft-carrying warshipbMissile-carrying submarinecAdvanced light helicopterdIntercontinental ballistic missile
26. Prelims 2007Q109Defence & Nuclear Technology

    Recently, the European Union and six other countries including India signed the International Thermonuclear Experimental Reactor (ITER) Project.

    Which one of the following was NOT a signatory to it?

    aCanadabChinacJapandUSA
27. Prelims 2007Q121Defence & Nuclear TechnologyAnswer disputed

    Consider the following statements:

    1.In November 2006, DRDO successfully conducted the interception test using Prithvi-II missile.

    2.Prithvi-II is a surface-to-surface missile and can be deployed to guard the metros against air attack.

    Which of the statements given above is/are correct?

    a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2
28. Prelims 2006Q28Defence & Nuclear Technology

    In which one of the following areas did the Indira Gandhi Center for Atomic Research make significant progress in the year 2005?

    aRe-processing the uranium-plutonium mixed carbide fuel of the Fast Breeder Test ReactorbNew applications of radio-isotopes in metallurgycA new technology for production of heavy waterdA new technology for high-level nuclear waste management
29. Prelims 2005Q30Defence & Nuclear Technology

    Which one of the following pairs is not correctly matched?

    aArjun : Indigenous produced Main Battle Tank (MBT)bPhalcon : Cruise missile supplied by Russia to IndiacSaras : Indigenously developed civilian passenger aircraftdOperation Seabird : New Indian Naval Base at Karwar
30. Prelims 2005Q100Defence & Nuclear Technology

    Match List-I (Atomic Power Plants/Heavy Water Plants) with List-II (State) and select the correct answer using the code given below the lists :

    List-I

    A.Thal

    B.Manuguru

    C.Kakrapar

    D.Kaiga

    List-II (State)

    1.Andhra Pradesh

    2.Gujarat

    3.Maharastra

    4.Maha

    5.Karnataka

    aA-2, B-1, C-4, D-5bA-3, B-5, C-2, D-1cA-2, B-5, C-4, D-1dA-3, B-1, C-2, D-5