Q191. Identify the correctly matched pair of the Aditya-L1 payload and its specific target of study:
Defence and Space Technology in India: RAS Prelims MCQs
195 RAS Prelims MCQs on defence and space technology in India cover DRDO, the missile programme, nuclear policy and space missions. The founding year of DRDO, its motto, the five missiles of the IGMDP, Agni-V, the Nuclear Doctrine and the major ISRO missions are asked as facts, and each explanation connects the system to its purpose.
Practice questions based on the RPSC RAS Prelims syllabus. They follow the exam pattern but are not past-paper questions.
Showing 191–195 of 195 questions
Q192. Which of the following layers of the Sun is inherently impossible to be directly studied via remote sensing instruments on Aditya-L1?
Explanation
While the observatory can use advanced cameras and sensors to study the different outer layers of the sun, it cannot see into the very center. The middle of the sun is hidden behind thousands of kilometers of dense material, making it impossible to observe directly with light or other signals. Scientists study the core using other methods like computer models or specialized particle detectors on Earth. The mission is focused on the parts of the sun that can be seen from space.
Q193. By definition, a Lagrange point in space is a position where:
Explanation
These are unique spots in space between two large objects, like the sun and the Earth, where a smaller object can stay in a fixed position. At these points, the pull of gravity from both large bodies perfectly balances the force of the small object’s motion. This creates a stable location that is perfect for placing satellites or observatories that need to stay in one place relative to the planets or the sun, allowing for long-term and continuous observation.
Q194. What is a key practical effect of Coronal Mass Ejections (CMEs) and solar flares that Aditya-L1 seeks to monitor for Earth’s benefit?
Explanation
Massive explosions of energy from the sun can send powerful clouds of particles toward our planet. When these clouds arrive, they can interfere with the electronics on satellites and even cause problems for power lines on the ground. By monitoring these events, the solar observatory helps provide warnings so that companies can protect their equipment. This is a very practical benefit of the mission, as it helps to keep our global communication and energy systems safe from the sun’s activity.
Q195. What is the most appropriate overall significance of the Aditya-L1 mission for India’s space programme?
Explanation
The successful launch and operation of this mission represent a major milestone, as it is the country’s first dedicated space observatory for the sun. It places the nation in a small group of spacefaring powers with the ability to conduct long-term solar research from deep space. The data collected will improve our understanding of the sun and help protect our technology from solar storms. This mission is a clear sign of the growing maturity and ambition of the national space program.Answer key for these questions
| Q | Correct answer |
|---|---|
| 191 | (d) VELC : Studying the solar corona and CMEs. |
| 192 | (d) Solar Core |
| 193 | (b) Two-body gravity balances centrifugal force. |
| 194 | (d) Solar weather disrupting satellites and grids. |
| 195 | (a) Operational deep space solar observatories. |
Key facts from Defence and Space Technology in India
- The Defence Research and Development Organisation was established in 1958; its motto is Balasya Mulam Vigyanam.
- The five core missiles of the Integrated Guided Missile Development Programme are Prithvi, Agni, Trishul, Nag and Akash, remembered as PATNA.
- The IGMDP was reinforced by the limits of the Missile Technology Control Regime; Dr A. P. J. Abdul Kalam is called the Missile Man of India.
- Agni-V is an Intercontinental Ballistic Missile; the Prithvi is a surface-to-surface battlefield missile.
- India formally adopted its Nuclear Doctrine in 2003.
- The Atmanirbhar Bharat reforms opened the space sector to private participation.
Frequently asked questions
How many RAS Prelims practice MCQs are there on Defence and Space Technology in India?
This page has 195 practice MCQs on Defence and Space Technology in India (Science and Technology). Each has the correct answer, and most have an explanation.
When was DRDO established?
In 1958. It is the research and development wing of the Ministry of Defence, and its motto is Balasya Mulam Vigyanam, meaning the source of strength is science.
What does PATNA stand for?
The five core missile systems of the IGMDP: Prithvi, Agni, Trishul, Nag and Akash. The programme was led by Dr A. P. J. Abdul Kalam and launched in 1983.
What is the category of the Agni-V missile?
An Intercontinental Ballistic Missile (ICBM), with a range of more than 5,000 km. It can carry a payload of around 1,500 kg, and it can carry multiple warheads, which makes it a strategic weapon.