NavIC clock failures and GNSS jamming and spoofing

1. Question 1Answer A

   Which component failed aboard an IRNSS satellite, weakening NavIC?

   • ACorrect answer: Atomic clock
   • BThruster
   • CSolar panel
   • DStar sensor

   Core Trigger: Another atomic clock failed aboard an IRNSS satellite, leaving NavIC with only a few fully working satellites.From Book 1 RATNA, topic 253, point 1

2. Question 2Answer B

   ISRO plans GSLV-F18 to launch which navigation satellite on 30 October 2026?

   • ANVS-04
   • BCorrect answer: NVS-03
   • CIRNSS-1J
   • DNVS-05

   Recovery Plan: ISRO plans GSLV-F18 with NVS-03 on 30 October 2026 at 11:51 pm IST; as of 29 October it had not flown.From Book 1 RATNA, topic 253, point 2

3. Question 3Answer C

   Who is the ISRO Chairman, leading the agency that operates NavIC?

   • AS. Somanath
   • BA.S. Kiran Kumar
   • CCorrect answer: V. Narayanan
   • DK. Sivan

   Current Head: V. Narayanan, ISRO Chairman, leads the agency that operates NavIC.From Book 1 RATNA, topic 253, point 3

4. Question 4Answer A

   Which of the following is/are correct? 1. Jamming drowns a signal with noise. 2. Jamming feeds a receiver a false position or time.

   • ACorrect answer: Only 1
   • BOnly 2
   • CBoth 1 and 2
   • DNeither

   Key Terms: Jamming drowns a signal with noise; spoofing feeds a receiver a false position or time.From Book 1 RATNA, topic 253, point 4

5. Question 5Answer D

   NVS-02, launched on GSLV-F15, was reported stuck in which orbit?

   • APolar orbit
   • BGeostationary orbit
   • CSun-synchronous orbit
   • DCorrect answer: Transfer orbit

   Earlier Setback: NVS-02, launched on GSLV-F15, was reported stuck in transfer orbit after a technical fault.From Book 1 RATNA, topic 253, point 5

6. Question 6Answer A

   Which satellite navigation system belongs to the EU?

   • ACorrect answer: Galileo
   • BBeiDou
   • CGPS
   • DGLONASS

   Rival Systems: GPS belongs to the US, GLONASS to Russia, Galileo to the EU, BeiDou to China and NavIC to India.From Book 1 RATNA, topic 253, point 6

7. Question 7Answer B

   From which centre do GSLV launches take place?

   • AVikram Sarabhai Space Centre, Thiruvananthapuram
   • BCorrect answer: Satish Dhawan Space Centre, Sriharikota
   • CThumba Equatorial Rocket Launching Station
   • DKulasekarapattinam Spaceport, Tamil Nadu

   Venue: GSLV launches take place from the Satish Dhawan Space Centre, Sriharikota, Andhra Pradesh.From Book 1 RATNA, topic 253, point 8

8. Question 8Answer B

   The system launched as IRNSS was named NavIC in which year?

   • A2019
   • BCorrect answer: 2016
   • C2018
   • D2014

   Founded: IRNSS-1A launched on 1 July 2013; the system was named NavIC in 2016.From Book 1 RATNA, topic 253, point 9

9. Question 9Answer A

   India's push for its own system is widely linked to GPS access worries during which conflict?

   • ACorrect answer: Kargil conflict, 1999
   • BGalwan clash, 2020
   • COperation Parakram, 2001
   • DDoklam standoff, 2017

   Landmark: India's push for its own system is widely linked to GPS access worries during the 1999 Kargil conflict.From Book 1 RATNA, topic 253, point 10

10. Question 10Answer C

    Which of the following is/are correct? 1. Article 45 of the ITU Constitution requires stations to avoid harmful interference. 2. Harmful interference can endanger a radionavigation service.

    • AOnly 1
    • BOnly 2
    • CCorrect answer: Both 1 and 2
    • DNeither

    Articles: Article 45 of the ITU Constitution requires all stations to avoid harmful interference with others' radio services. Definition: Harmful interference endangers a radionavigation service or seriously degrades, obstructs or interrupts a radio service.From Book 1 RATNA, topic 253, point 11, point 12

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