9,654 RAS Prelims practice MCQs with the correct answer and a clear explanation for each. Filter by subject and chapter.
Practice questions based on the RPSC RAS Prelims syllabus. They follow the exam pattern but are not past-paper questions.
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RAS PrelimsScience and Technology · Recent Advances, Indian Contributors and Indigenization
Q5891. Consider the following statements regarding the Advanced Medium Combat Aircraft (AMCA) project: I. It is being developed by the Aeronautical Development Agency (ADA). II. The Cabinet Committee on Security (CCS) recently cleared the project for prototype development. III. It is designed as a twin-engine fighter aircraft. IV. It will feature a Diverterless Supersonic Inlet (DSI) for improved stealth. V. It will replace the entire fleet of C-17 transport aircraft. Which of the above statement(s) is/are correct?
Explanation
The AMCA is a twin-engine fighter project led by the ADA, recently receiving official clearance for prototype development. Its design features stealth elements like Diverterless Supersonic Inlets to improve performance and maintain a low radar signature. While it will transform India’s combat fleet, it is a fighter jet designed for air superiority and strike missions, not a transport aircraft meant to replace the C-17 fleet.
RAS PrelimsScience and Technology · Recent Advances, Indian Contributors and Indigenization
Q5892. The India Semiconductor Mission (ISM) was launched to build a vibrant semiconductor and display ecosystem. It operates under which nodal Ministry?
Explanation
The India Semiconductor Mission is a specialized division established to drive the national strategy for building a domestic semiconductor ecosystem. It operates under the Ministry of Electronics and Information Technology. MeitY provides the policy framework and financial support necessary to attract global investments and encourage indigenous research in the highly complex and capital-intensive field of semiconductor manufacturing and design.
RAS PrelimsScience and Technology · Recent Advances, Indian Contributors and Indigenization
Q5893. Under the India Semiconductor Mission, the DLI scheme provides financial incentives and design infrastructure support. What does DLI stand for?
Explanation
The Design Linked Incentive (DLI) scheme is a key component of the India Semiconductor Mission. It provides financial support and infrastructure to Indian companies and startups involved in semiconductor design. By offering incentives linked to the success of their designs, the government aims to foster a domestic ecosystem for Integrated Circuit (IC) design, ensuring that India contributes to the high-value research and intellectual property.
RAS PrelimsScience and Technology · Recent Advances, Indian Contributors and Indigenization
Q5894. India’s first major commercial semiconductor fabrication plant (Fab) is being set up by the Tata Group in partnership with Powerchip Semiconductor Manufacturing Corp (PSMC). Where is this plant located?
Explanation
India’s first major commercial semiconductor fabrication plant, or "Fab," is located in Dholera, Gujarat. This facility is being established by Tata Electronics in a strategic partnership with the Taiwanese firm PSMC. The Dholera Special Investment Region provides the necessary large-scale infrastructure, including high-quality water and stable power, required for the precision manufacturing of silicon wafers and advanced semiconductor chips.
RAS PrelimsScience and Technology · Recent Advances, Indian Contributors and Indigenization
Q5895. Read the following statements and select the correct option: Assertion (A): Many initial semiconductor investments in India are focused on ATMP/ OSAT facilities rather than full-fledged Fabrication units. Reason (R): ATMP facilities require relatively lower initial capital expenditure, have faster setup times, and help build a foundational talent pool compared to complex Fabs.
Explanation
The National Green Hydrogen Mission is fundamentally linked to India’s renewable energy growth because green hydrogen is defined by its production process. To be considered ‘green’, hydrogen must be produced through the electrolysis of water powered entirely by renewable sources like solar or wind. Therefore, expanding renewable capacity is a necessary prerequisite for achieving the mission’s goal of large-scale green hydrogen production.
RAS PrelimsScience and Technology · Recent Advances, Indian Contributors and Indigenization
Q5896. A key feature of the Indian Space Policy 2023 is the clear delineation of roles. Under this policy, what is the specific focus assigned to ISRO?
Explanation
Under the 2023 Space Policy, ISRO’s role has been redefined to focus on the frontiers of science and technology. By delegating routine satellite manufacturing and launch services to the private sector and NSIL, ISRO can dedicate its resources to high-end R&D. This includes developing next-generation launch vehicles, conducting interplanetary missions, and leading human spaceflight programs like Gaganyaan, ensuring India stays at the cutting edge of global space exploration.
RAS PrelimsScience and Technology · Recent Advances, Indian Contributors and Indigenization
Q5897. Which of the following statements correctly differentiates the Small Satellite Launch Vehicle (SSLV) from the Polar Satellite Launch Vehicle (PSLV)?
Explanation
The Small Satellite Launch Vehicle (SSLV) is specifically engineered for the rapidly growing market of mini and micro-satellites. Unlike the larger PSLV, which takes months to prepare, the SSLV can be integrated and launched within a few days by a small team. This high flexibility and low cost make it an ideal choice for commercial customers looking for frequent and affordable access to low Earth orbit.
RAS PrelimsScience and Technology · Recent Advances, Indian Contributors and Indigenization
Q5898. Match the space entity in List I with its mandate or activity in List II and select the correct answer.
Space Entity
Mandate/Activity
A. ISRO
i. Private space startup developing launch vehicles
B. IN-SPACe
ii. Advanced space research and planetary missions
C. NSIL
iii. Commercialization of space technologies and launch services
D. Skyroot Aerospace
iv. Authorization and regulation of private space sector
Explanation
The Indian space ecosystem involves various specialized entities. ISRO focuses on advanced research and planetary missions, while IN-SPACe regulates and authorizes private sector participation. NSIL handles the commercialization of technologies and launch services. Meanwhile, private startups like Skyroot Aerospace are actively developing their own launch vehicles, demonstrating the success of recent reforms in opening up the space sector to competitive private innovation and development.
RAS PrelimsScience and Technology · Recent Advances, Indian Contributors and Indigenization
Q5899. Consider the following statements: Statement I: Vikram-S, launched in 2022, was India’s first privately developed rocket. Statement II: The launch of Vikram-S marked the entry of Indian private startups into the launch vehicle sector, ending ISRO’s monopoly. Which of the following is correct?
Explanation
The 2022 launch of the Vikram-S rocket, developed by the startup Skyroot Aerospace, was a historic moment for India. It was the first time a rocket designed and built by a private company was successfully launched from an Indian spaceport. This event signaled the end of ISRO’s role as the sole operator of launch vehicles and proved that Indian startups could develop sophisticated aerospace technologies independently.
RAS PrelimsScience and Technology · Recent Advances, Indian Contributors and Indigenization
Q5900. Identify the odd one out among the entities contributing to the Indian space economy.
Explanation
The Liquid Propulsion Systems Centre (LPSC) is an integral research and development unit of ISRO, focused on rocket engine technology. In contrast, Agnikul Cosmos, Pixxel, and Bellatrix Aerospace are all private Indian space startups. These private companies represent the new wave of commercial innovation in the space sector, working on launch vehicles, Earth observation satellites, and advanced propulsion systems independently of the traditional government-led framework.
Answer key for these questions
Q
Correct answer
5891
(a) I, II, III, and IV only
5892
(d) Ministry of Electronics and Information Technology (MeitY)
5893
(a) Design Linked Incentive
5894
(c) Dholera, Gujarat
5895
(a) Both A and R are true and R is the correct explanation of A.
5896
(c) To step away from commercial manufacturing and focus on advanced research, development of new technologies, and deep space exploration
5897
(d) SSLV is designed to be assembled on demand with quick turnaround time and lower cost to cater to the growing small satellite market.
5898
(c) A-ii, B-iv, C-iii, D-i
5899
(a) Both Statement I and Statement II are correct
5900
(a) Liquid Propulsion Systems Centre (LPSC)
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.
