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Science & TechnologyMediumAsked in: UPSC Civil Services · CSE Prelims 2022, GS Paper I

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

  1. A.A hypersonic missile is launched into space to counter the asteroid approaching the Earth and explode it in space.
  2. B.A spacecraft lands on another planet after making several orbital motions.
  3. C.A missile is put into a stable orbit around the Earth and deorbits over a target on the Earth.
  4. D.A spacecraft moves along a comet with the same speed and places a probe on its surface.

Correct answer

C. A missile is put into a stable orbit around the Earth and deorbits over a target on the Earth.

Explanation

The correct answer is C. In a Fractional Orbital Bombardment System, a warhead is placed in a low orbit around the Earth and then brought down out of that orbit onto its target.

The name comes from the fact that the weapon completes only a fraction of an orbit before deorbiting. The Soviet Union developed such a system in the 1960s. Its value lies in surprise: an ordinary ballistic missile follows a predictable arc, but an orbital warhead can approach from any direction, even over the South Pole, where early-warning radars do not look, and its path is hard to read until it begins to descend. The idea returned to the news when China reportedly tested a hypersonic glide vehicle launched into orbit in 2021.

A is wrong: destroying an incoming asteroid is planetary defence, as in NASA's DART mission.

B is wrong: orbiting before landing on another planet describes a planetary lander.

D is wrong: matching a comet's speed to drop a probe describes missions like Rosetta and Philae.

Exam tip: FOBS = partial orbit, then deorbit onto a target; it can dodge early-warning radars by coming from an unexpected direction.

Practice Questions

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Q1.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2017, GS Paper IHard

With reference to 'Quality Council of India (QCI)', consider the following statements:

1. QCI was set up jointly by the Government of India and the Indian Industry.

2. Chairman of QCI is appointed by the Prime Minister on the recommendations of the industry to the Government.

Which of the above statements is/are correct?

  1. A.1 only
  2. B.2 only
  3. C.Both 1 and 2
  4. D.Neither 1 nor 2
Show answer
Correct answer: C. Both 1 and 2

QCI is a joint body of the government and industry, and its chairperson is appointed by the Prime Minister on the industry's recommendation.

Q2.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2026, GS Paper IMedium

Which of the following statements with regard to India's Deep Ocean Mission is/are correct?

1. It was launched by the Ministry of Ports, Shipping and Waterways, Government of India.

2. Matsya-6000 has been designed to carry 3 people for deep sea exploration.

3. Samudrayaan is a project under this mission.

Select the answer using the code given below:

  1. A.1 only
  2. B.2 and 3 only
  3. C.1 and 2 only
  4. D.1, 2 and 3
Show answer
Correct answer: B. 2 and 3 only

Samudrayaan is part of the Deep Ocean Mission and its vehicle Matsya-6000 is built to take three people into the deep sea; the mission belongs to the Ministry of Earth Sciences.

Q3.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2022, GS Paper IMedium

In the context of vaccines manufactured to prevent COVID-19 pandemic, consider the following statements:

1. The Serum Institute of India produced COVID-19 vaccine named Covishield using mRNA platform.

2. Sputnik V vaccine is manufactured using vector based platform.

3. COVAXIN is an inactivated pathogen based vaccine.

Which of the statements given above are correct?

  1. A.1 and 2 only
  2. B.2 and 3 only
  3. C.1 and 3 only
  4. D.1, 2 and 3
Show answer
Correct answer: B. 2 and 3 only

Sputnik V uses adenovirus vectors and Covaxin uses killed (inactivated) virus; Covishield is not an mRNA vaccine. Covishield is the Oxford–AstraZeneca vaccine made in India by the Serum Institute.

Q4.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2026, GS Paper IMedium

Which of the following statements with regard to the National Quantum Mission (NQM) is/are correct?

1. It aims at developing intermediate-scale quantum computers with 50 - 1000 physical qubits.

2. Its implementation includes setting up of four Thematic Hubs (T-Hubs) in academic and national R&D institutes across India.

Select the answer using the code given below:

  1. A.1 only
  2. B.2 only
  3. C.Both 1 and 2
  4. D.Neither 1 nor 2
Show answer
Correct answer: C. Both 1 and 2

The mission targets intermediate-scale quantum computers of 50 to 1000 physical qubits and is being carried out through four Thematic Hubs.

Q5.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2026, GS Paper IMedium

Which of the following statements with regard to GenomeIndia Project is/are correct?

1. It is a part of the Human Genome Project.

2. The project is funded by the Department of Biotechnology (DBT), Government of India.

3. Its primary aim is to build a catalogue of genetic diversity of the Indian population.

Select the answer using the code given below:

  1. A.1 only
  2. B.2 and 3 only
  3. C.1 and 2 only
  4. D.1, 2 and 3
Show answer
Correct answer: B. 2 and 3 only

GenomeIndia is India's own national programme, paid for by the Department of Biotechnology, and its goal is a reference catalogue of Indian genetic variation.