Science & Technology › Defence Technology – UPSC Prelims PYQs

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.

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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.

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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.

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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

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With reference to Unmanned Aerial Vehicles (UAVs), consider the following statements : I. All types of UAVs can do vertical landing. II. All types of UAVs can do automated hovering. III. All types of UAVs can use battery only as a source of power supply.

How many of the statements given above are correct?

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?

With reference to India’s defence, consider the following pairs : I. II. III.

How many of the pairs given above are correctly matched?

Consider the following activities : 1. 2. 3. In how many of the above activities can the radars be used ?

Consider the following aircraft : 1. 2. 3.

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

Which of the following is/are correctly matched in terms of equivalent rank in the three services of Indian Defence forces ? 1. 2. 3. 4.

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What are the duties of the Chief of Defence Staff (CDS) as Head of the Department of Military Affairs ? 1. 2. 3.

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Consider the following actions :

1. Detection of car crash/collision which results in the deployment of airbags almost instantaneously
2. Detection of accidental free fall of a laptop towards the ground which results in the immediate turning off of the hard drive
3. Detection of the tilt of the smart-phone which results in the rotation of display between portrait and landscape mode In how many of the above actions is the function of accelerometer required?

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?

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

Which one of the following statements best describes the 'Polar Code' ?

Consider the following activities :

1. Spraying pesticides on a crop field
2. Inspecting the craters of active volcanoes
3. Collecting breath samples from spouting whales for DNA analysis At the present level of technology, which of the above activities can be successfully carried out by using drones ?

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

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

What is 'Greased Lightning–10 (GL–10)', recently in the news?

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.

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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?

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 ?

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

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

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?

Which one of the following pairs is not correctly matched?

With reference to Indian defence,

which one of the following statements is correct?

The range of Agni-II missile is around

Which one of the following is a modern tank?