Q1931. By definition, what is the role of the Space Commission in India?
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Q1932. Identify the correct statement regarding the economic transactions and coins in ancient Rajasthan:
Explanation
Ancient coinage in Rajasthan was diverse. Punch-marked coins were primarily silver or copper. The barter system continued to exist alongside metallic currency. Indo-Greek coins were not minted in Kalibangan but entered through trade. However, it is a well-documented historical fact that Malava republic coins were inscribed with the legend ‘Malavanam Jaya’, meaning ‘Victory to the Malavas’, reflecting their political identity and autonomy.
Q1933. What was the effect of Dr. Vikram Sarabhai’s initial vision on the trajectory of ISRO’s early projects?
Explanation
The early direction of the space program was heavily influenced by a belief that technology should directly improve the lives of citizens. Rather than pursuing prestige-driven races, the focus was placed on practical uses like education, television broadcasting, and resource management. This unique approach led to the development of sophisticated communication and remote sensing satellites that have played a crucial role in the country’s modernization. This people-centric philosophy remains a core value of the organization today.
Q1934. The transition from ancient to early medieval Rajasthan is characterized by the concept of ‘Feudalism’ (Samanta system). A key feature of this system was:
Explanation
A fundamental feature of the Samanta or feudal system in early medieval Rajasthan was the granting of land by the king to subordinates in exchange for military or administrative services. This practice led to the creation of a hierarchy of local lords who exercised significant authority over their territories. Consequently, political power became decentralized, shifting away from a strong central monarchy toward regional principalities.
Q1935. The most appropriate function of ISRO’s Master Control Facility (MCF) at Hassan and Bhopal is:
Explanation
These specialized facilities at two different locations are responsible for the health and orbital management of communication satellites. They perform maneuvers to keep the spacecraft in their correct positions and monitor their various subsystems. This constant supervision is necessary to ensure that services like television broadcasting and telecommunications remain uninterrupted. These centers act as the vital ground link that maintains the operational integrity of the nation’s extensive and sophisticated satellite network in high-altitude orbits.
Q1936. Consider the following statements regarding the Polar Satellite Launch Vehicle (PSLV):
I. It is a four-stage launch vehicle.
II. It uses alternating solid and liquid propulsion stages.
III. It is commonly referred to as the "Workhorse of ISRO".
Which of the above statement(s) is/are correct?
I. It is a four-stage launch vehicle.
II. It uses alternating solid and liquid propulsion stages.
III. It is commonly referred to as the "Workhorse of ISRO".
Which of the above statement(s) is/are correct?
Explanation
This versatile rocket is a four-stage system that alternates between using solid and liquid fuels for its propulsion. Because of its high success rate and reliability over many years, it is often called the mainstay of the national space agency. It has been used for a wide variety of missions, including Earth observation and interplanetary travel. Its consistent performance has made it a preferred choice for launching both domestic and international satellites into polar orbits.
Q1937. Match the ISRO launch vehicles in List I with their defining characteristics in List II:
| Launch Vehicle | Characteristic |
|---|---|
| A. SLV-3 | i. Features an indigenous cryogenic upper stage |
| B. PSLV | ii. Heaviest launcher, designed for 4-ton class satellites to GTO |
| C. GSLV Mk II | iii. India’s first experimental satellite launch vehicle |
| D. LVM3 (GSLV Mk III) | iv. First operational launch vehicle with liquid stages |
Explanation
The early experimental rocket provided the first successful domestic launch. The later mainstay vehicle was the first to incorporate liquid stages. Modern heavy launchers utilize advanced cryogenic engines for carrying larger satellites. The most powerful variant is specifically designed for the heaviest payloads, enabling the placement of massive communication satellites into high orbits. This progression highlights the steady growth in the country’s ability to reach different levels of space with increasingly complex and capable rocket technology.
Q1938. Arrange the following ISRO launch vehicles in ascending order of their payload carrying capacity to Low Earth Orbit (LEO):
I. LVM3
II. PSLV
III. SSLV (Small Satellite Launch Vehicle)
IV. GSLV Mk II
Which of the following is the correct sequence?
I. LVM3
II. PSLV
III. SSLV (Small Satellite Launch Vehicle)
IV. GSLV Mk II
Which of the following is the correct sequence?
Explanation
The ability to carry weight into low orbit varies significantly between different rockets. A small, new launcher is designed for light payloads, followed by the mid-range performance of the long-standing workhorse. The standard heavy launcher provides greater capacity, while the most powerful variant currently in service can carry the largest weight. This sequence reflects the range of options available for different types of missions, from small research satellites to large strategic and commercial spacecraft.
Q1939. The propulsion sequence of the four stages of the PSLV from first (bottom) to fourth (top) is:
Explanation
The propulsion architecture of this four-stage rocket involves an alternating pattern of fuel types. The first and third stages use solid motors to provide powerful thrust, while the second and fourth stages utilize liquid engines for precise control and sustained performance. This unique configuration has proven to be highly reliable and efficient for a wide range of missions. Each stage plays a specific role in lifting the payload through the atmosphere and placing it into its intended orbit.
Q1940. Which statement correctly highlights the major technological milestone achieved in the GSLV Mk II development?
Explanation
Achieving the capability to use extremely cold liquid fuels was a major technological hurdle. These engines provide much higher efficiency than traditional rockets, allowing for the launch of heavier satellites into very high orbits. After years of research and testing, the successful use of a locally built version of this technology was a historic achievement. It ended reliance on foreign engines for high-altitude missions and significantly boosted the nation’s strategic and commercial space capabilities.Answer key for these questions
| Q | Correct answer |
|---|---|
| 1931 | (b) Policy formulation and oversight of the Indian space programme. |
| 1932 | (d) The Malava republic coins invariably carried the legend ‘Malavanam Jaya’. |
| 1933 | (d) Emphasizing space applications for societal benefits like telecom. |
| 1934 | (a) Granting land in lieu of services, leading to decentralized power |
| 1935 | (a) Monitoring and controlling geostationary and geosynchronous satellites. |
| 1936 | (d) I, II, and III |
| 1937 | (a) A-iii, B-iv, C-i, D-ii |
| 1938 | (a) III, II, IV, I |
| 1939 | (c) Solid, Liquid, Solid, Liquid |
| 1940 | (c) Development and successful flight of an indigenous Cryogenic Upper Stage. |
Frequently asked questions
How many RAS Prelims practice MCQs are there on RAS Prelims?
This page has 9654 practice MCQs on the RAS Prelims syllabus. Each has the correct answer, and most have an explanation.
How should I practise MCQs for RAS Prelims?
Attempt each question first, then open the answer and read the explanation. Practise one chapter at a time, note the facts you got wrong and revise them. Repeat the chapter after a few days.
Are these actual RAS Prelims past-paper questions?
No. These are practice questions written for the RAS Prelims syllabus. They follow the pattern the exam uses: factual questions, statement-based questions, match-the-list and assertion-reason.