Topic 139 · Answers
INS Aridhaman: third SSBN joins nuclear triad
Which submarine was inducted on 3 April 2026 as India's third nuclear-powered ballistic missile submarine?
- INS Chakra
- Correct answer: INS Aridhaman
- INS Kalvari
- INS Vagir
Core Trigger: INS Aridhaman, India's third nuclear-powered ballistic missile submarine, was inducted on 3 April 2026.From Book 1 RATNA, topic 139, point 1
How many launch tubes does INS Aridhaman have for K-15 and K-4 missiles?
- Correct answer: Eight
- Four
- Six
- Twelve
Armament: Displacing about 7,000 tonnes, it carries eight launch tubes for K-15 and K-4 submarine-launched ballistic missiles.From Book 1 RATNA, topic 139, point 2
INS Arighaat, the SSBN that preceded Aridhaman, was inducted in which year?
- 2016
- 2020
- 2022
- Correct answer: 2024
Boat Sequence: It follows INS Arihant (2016) and INS Arighaat (2024) in India's SSBN fleet.From Book 1 RATNA, topic 139, point 3
The name Aridhaman is Sanskrit for what?
- Correct answer: Destroyer of enemies
- Guardian of the deep
- Protector of the seas
- Silent hunter
Name Meaning: Aridhaman is Sanskrit for destroyer of enemies.From Book 1 RATNA, topic 139, point 4
Consider the missiles carried by Aridhaman. 1. K-15 is the longer-range missile. 2. Both K-15 and K-4 were developed by DRDO. Which is/are correct?
- Only 1
- Correct answer: Only 2
- Both 1 and 2
- Neither
Missile Range: K-15 is the shorter-range missile; K-4 is the longer-range one, both developed by DRDO.From Book 1 RATNA, topic 139, point 5
Aridhaman strengthens which leg of India's nuclear triad?
- Land-based leg
- Air-based leg
- Correct answer: Sea-based leg
- Space-based leg
India Link: Aridhaman strengthens the sea leg of India's nuclear triad of land, air and sea delivery.From Book 1 RATNA, topic 139, point 7
In which state is the base of India's submarine-building programme located?
- Odisha
- Tamil Nadu
- Gujarat
- Correct answer: Andhra Pradesh
Venue: Visakhapatnam, Andhra Pradesh, is the base of the submarine-building programme.From Book 1 RATNA, topic 139, point 8
In which year was INS Arihant, India's first SSBN, inducted?
- 2012
- 2014
- 2018
- Correct answer: 2016
Founded: INS Arihant, India's first SSBN, was inducted in 2016 from the secret Advanced Technology Vessel project.From Book 1 RATNA, topic 139, point 9
India's nuclear doctrine, made official on 4 January 2003, rests on which pair of principles?
- First strike and flexible response
- Correct answer: No first use and credible minimum deterrence
- Preemption and total disarmament
- Mutual destruction and containment
Landmark: India's nuclear doctrine, made official on 4 January 2003, rests on no first use and credible minimum deterrence.From Book 1 RATNA, topic 139, point 10
Which Act is the parent law governing nuclear energy and materials in India?
- Nuclear Safety Act, 1984
- Correct answer: Atomic Energy Act, 1962
- Atomic Weapons Control Act, 1970
- Energy Conservation Act, 2001
Statute: The Atomic Energy Act, 1962 is the parent law governing nuclear energy and materials in India.From Book 1 RATNA, topic 139, point 11
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