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Science & Technology Previous Year Questions (PYQ) with Answers – Page 7

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Science & Technology questions asked in previous year papers of SSC, Banking, Railway and other exams, with the exam and year, answers and explanations.

128 previous-year questions

All Science & Technology questionsScience & Technology NotesPYQs by exam
Q121.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2016, GS Paper IMedium

Consider the following statements : The Mangalyaan launched by ISRO 1. is also called the Mars Orbiter Mission 2. made India the second country to have a spacecraft orbit the Mars after USA 3. made India the only country to be successful in making its spacecraft orbit the Mars in its very first attempt Which of the statements given above is/are correct?

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

Mangalyaan is the popular name of ISRO's Mars Orbiter Mission, and India reached Mars orbit on its first attempt, but it was not the second country to do so.

Q122.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2016, GS Paper IMedium

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

  1. A.It can use thorium in place of uranium for power generation
  2. B.It can attain a global role in satellite navigation
  3. C.It can drastically improve the efficiency of its fission reactors in power generation
  4. D.It can build fusion reactors for power generation
Show answer
Correct answer: D. It can build fusion reactors for power generation

ITER is an experiment to prove that nuclear fusion can work as a large-scale energy source, and every member shares its technology.

Q123.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2016, GS Paper IMedium

With reference to 'Bitcoins', sometimes seen in the news, which of the following statements is/are correct? 1. Bitcoins are tracked by the Central Banks of the countries. 2. Anyone with a Bitcoin address can send and receive Bitcoins from anyone else with a Bitcoin address. 3. Online payments can be sent without either side knowing the identity of the other. Select the correct answer using the code given below.

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

Bitcoin is a decentralised peer-to-peer currency that no central bank issues or tracks, and payments are made between addresses rather than named people.

Q124.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2016, GS Paper IMedium

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

  1. A.Amphibious warfare ship
  2. B.Nuclear-powered submarine
  3. C.Torpedo launch and recovery vessel
  4. D.Nuclear-powered aircraft carrier
Show answer
Correct answer: C. Torpedo launch and recovery vessel

INS Astradharini is an Indian Navy ship built to launch torpedoes during trials and recover them afterwards. The vessel was commissioned at Visakhapatnam in 2015.

Q125.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2016, GS Paper IMedium

In the context of the developments in Bioinformatics, the term 'transcriptome', sometimes seen in the news, refers to

  1. A.a range of enzymes used in genome editing
  2. B.the full range of mRNA molecules expressed by an organism
  3. C.the description of the mechanism of gene expression
  4. D.a mechanism of genetic mutations taking place in cells
Show answer
Correct answer: B. the full range of mRNA molecules expressed by an organism

The transcriptome is the complete set of RNA transcripts, chiefly messenger RNA, made from the genes at a given time.

Q126.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2016, GS Paper IEasy

With reference to 'LiFi', recently in the news, which of the following statements is/are correct?

1. It uses light as the medium for high-speed data transmission.

2. It is a wireless technology and is several times faster than 'WiFi'.

Select the correct 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

LiFi (Light Fidelity) sends data wirelessly by switching LED light on and off far too fast for the eye to notice, and it can be many times faster than WiFi.

Q127.Science & TechnologyAsked in: Bihar · BPSC AE Paper 5, 2012Hard

The coolant used in a boiling water reactor is:

  1. A.carbon dioxide
  2. B.pressurised water
  3. C.a mixture of water and steam
  4. D.liquid metal
Show answer
Correct answer: C. a mixture of water and steam

In a boiling water reactor, the design used at Tarapur, ordinary water is allowed to boil inside the reactor vessel itself, so the coolant leaving the core is a mixture of water and steam; the steam is separated at the top and driven straight to the turbine, without the separate…

Q128.Science & TechnologyAsked in: Bihar · BPSC AE Paper 5, 2012Easy

Where was India's first nuclear power plant set up?

  1. A.Tarapur
  2. B.Kudankulam
  3. C.Kaiga
  4. D.Rawatbhata
Show answer
Correct answer: A. Tarapur

The Tarapur Atomic Power Station in Maharashtra was commissioned in 1969 with American assistance and was the first nuclear power station in India as well as in Asia; its first two units are boiling water reactors, a design used nowhere else in the country.