Nuclear Programme & Policy — Set 11

Correct Answer: B. 2012

Agni-V, India's longest-range ballistic missile with a range of 5000+ km (some estimates suggest up to 8000 km), was first successfully tested on 19 April 2012 from Wheeler Island, Odisha. It can carry a nuclear warhead of about 1.5 tonnes. Agni-V's canisterised version was tested in 2016, allowing mobile launch from road-mobile transporter-erector-launchers (TELs). Agni-V brings all of China's territory within India's nuclear reach, completing a credible deterrence posture against China.

Correct Answer: C. 7th largest

India ranks approximately 7th in total nuclear warhead count globally with 172 warheads (SIPRI 2024). The hierarchy is: Russia (~5580), USA (~5044), China (~500), France (~290), UK (~225), Pakistan (~170), India (~172). With India and Pakistan roughly equal and China pulling ahead rapidly, the strategic dynamics in Asia are shifting. India's arsenal, while relatively small, is designed for credible minimum deterrence against its nuclear-armed neighbours.

Correct Answer: B. USA (President Obama)

The Nuclear Security Summit (NSS) process was initiated by US President Barack Obama, who hosted the first NSS in Washington DC in April 2010. Subsequent summits were held in Seoul (2012), The Hague (2014), and Washington DC (2016). India actively participated in all four summits and made significant commitments to improving nuclear security. The summits resulted in reducing stocks of highly enriched uranium globally and strengthening nuclear security practices. India's PM Manmohan Singh (2010, 2012) and PM Modi (2014, 2016) attended.

Correct Answer: B. Developing delivery systems (missiles, aircraft integration) for nuclear weapons

DRDO's role in India's nuclear programme is developing and producing delivery systems — the ballistic missiles (Agni, Prithvi series), cruise missiles (Nirbhay), and integration of nuclear weapons onto aircraft (Jaguar, Mirage-2000, Rafale). BARC is responsible for nuclear warhead design; DRDO makes the platforms that deliver them. DRDO has also developed the Prithvi Air Defence (PAD/AAD) Ballistic Missile Defence system which can intercept incoming nuclear missiles, providing additional strategic protection.

Correct Answer: A. USA

The USA was the most significant country to effectively recognise India as a nuclear weapon state by crafting the Indo-US Civil Nuclear Agreement (123 Agreement, 2008) which allows India access to civilian nuclear technology despite not being an NPT signatory. The US amended its own Atomic Energy Act (Hyde Act 2006) and led the NSG to grant India a clean waiver in 2008. While no country formally recognises India as a 'Nuclear Weapon State' under NPT, the 123 Agreement practically treats India as a responsible nuclear power.

Correct Answer: B. Sea-launched nuclear delivery

Dhanush is the naval version of the Prithvi-III ballistic missile, designed for sea-launched nuclear delivery. It has a range of 350 km and can carry a nuclear or conventional warhead of 500 kg. Dhanush is launched from surface ships (not submarines) and was tested from the converted patrol vessel INS Subhadra. It provides an additional sea-based component to India's nuclear deterrence alongside SLBM-equipped submarines. Dhanush has been operational with the Indian Navy since 2014.

Correct Answer: C. Pressurised Light Water Reactor

India's nuclear submarines (INS Arihant and INS Arighat) are powered by an 83 MWt Pressurised Light Water Reactor (PLWR) using Highly Enriched Uranium (HEU) fuel. Light water reactors are more compact than heavy water reactors, making them suitable for submarine applications. The HEU fuel for these reactors is produced at India's enrichment facility at Rattehalli. India developed this technology with Russian guidance through the INS Chakra lease programme. The reactor design provides silent, long-duration propulsion for strategic patrols.

Correct Answer: D. Atal Bihari Vajpayee

PM Atal Bihari Vajpayee announced India's successful nuclear tests and declared India a nuclear weapon state on 11 May 1998 following the first three tests of Operation Shakti. The announcement was made from his official residence and broadcast on national television. Vajpayee's government had authorised the tests within weeks of coming to power in March 1998. The announcement was a historic moment in India's strategic history.

Correct Answer: B. Thal, Maharashtra

The Heavy Water Plant (HWP) at Thal, Raigad district, Maharashtra, is India's largest heavy water production facility with a capacity of about 110 tonnes per year. It uses the hydrogen sulfide monothermal process. India's network of seven HWPs produces about 350-400 tonnes of heavy water annually. India has become self-sufficient in heavy water after Canadian supply was cut in 1974. India now exports heavy water to South Korea and other countries, generating revenue.

Correct Answer: C. Submarine-launched ballistic missiles (SLBMs)

Submarine-launched ballistic missiles (SLBMs) provide the most survivable second-strike capability because submarines can hide in the vast oceans, making them extremely difficult to detect and destroy in a pre-emptive first strike. Land-based missiles in silos have known fixed locations and can be targeted. Aircraft can be destroyed on the ground. Road-mobile missiles improve survivability over silos but submarines at sea remain the gold standard for assured second strike. India's INS Arihant and INS Arighat provide this crucial capability.