Q1081. Which of the following is the most appropriate strategic significance of the commissioning of INS Vikrant for the Indian Navy?
Science and Technology: RAS Prelims MCQs
1113 RAS Prelims practice MCQs on science and technology are on this page, in 6 chapters. They cover the basics of everyday science, computers and information technology, defence and space technology in India, genetics, biotechnology and nanotechnology, science and technology policies and government programmes, and recent advances with Indian contributors and indigenisation. Each question has an answer and an explanation.
Practice questions based on the RPSC RAS Prelims syllabus. They follow the exam pattern but are not past-paper questions.
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Q1082. Identify the odd one out among the systems/ components concerning the indigenous nature of INS Vikrant.
Explanation
While INS Vikrant features a high percentage of indigenous systems, some critical components are sourced from international partners. The warship-grade steel, combat management system, and main gearboxes were all developed or manufactured by Indian companies like SAIL, Tata, and Elecon. The gas turbines used for propulsion, however, are LM2500 models provided by the American company General Electric, representing an imported technology in the ship’s design.
Q1083. Which of the following is an exception regarding countries that have successfully developed and operationalized their own indigenous 5th-generation fighter jets as of 2023?
Explanation
As of 2023, only a few nations have successfully developed and deployed indigenous fifth-generation stealth fighters. This elite group includes the United States with the F-22 and F-35, China with the J-20, and Russia with the Su-57. While India’s AMCA program is an ambitious national project, the aircraft is still in the development and prototyping phase and has not yet been operationalized for active service.
Q1084. Identify the odd one out among the distinct features that separate a 5th-generation fighter (like AMCA) from a 4th-generation fighter (like Mirage 2000).
Explanation
Fifth-generation fighters use advanced design features like serpentine S-duct air intakes to hide engine blades and low-observable shaping to minimize radar reflections. They also feature highly integrated sensor fusion. Standard combat configurations for these jets avoid external tanks or pylons, as these components reflect radar waves and destroy the aircraft’s stealth. Instead, they rely on internal fuel tanks and internal weapons bays for primary missions.
Q1085. What is the primary operational effect of reducing the Radar Cross Section (RCS) of the AMCA?
Explanation
Reducing the Radar Cross Section (RCS) is the primary goal of stealth design. A lower RCS means that the aircraft reflects very little radar energy back to the receiver. Effectively, this allows the AMCA to get much closer to enemy positions or aircraft before it is detected and tracked. This "first look, first shot" advantage is critical for survival and mission success in modern aerial warfare.
Q1086. 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?
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.
Q1087. 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.
Q1088. 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.
Q1089. 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.
Q1090. 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.
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.Answer key for these questions
| Q | Correct answer |
|---|---|
| 1081 | (c) It joins India to an elite group constructing indigenous carriers. |
| 1082 | (a) Gas turbines provided by General Electric (GE) |
| 1083 | (c) India (AMCA) |
| 1084 | (d) External drop tanks and under-wing missile pylons as standard combat configuration |
| 1085 | (c) It reduces the distance at which enemy radars track the aircraft |
| 1086 | (a) I, II, III, and IV only |
| 1087 | (d) Ministry of Electronics and Information Technology (MeitY) |
| 1088 | (a) Design Linked Incentive |
| 1089 | (c) Dholera, Gujarat |
| 1090 | (a) Both A and R are true and R is the correct explanation of A. |
Key facts from Science and Technology
- The RPSC paper is General Knowledge and General Science, so science questions come with a strong dose of applied and recent topics.
- Everyday science questions test the laws and terms of physics, chemistry and biology through examples.
- Defence and space questions pair a missile, satellite or mission with its year and organisation.
- Policy questions ask for the year, the body and the aim of schemes like STIP, the National Quantum Mission and BioE3.
- Health, environment and agriculture are on a separate page, with their own chapters.
Frequently asked questions
How many RAS Prelims practice MCQs are there on Science and Technology?
This page has 1113 practice MCQs on Science and Technology. Each has the correct answer, and most have an explanation.
Which chapters does the science and technology set cover?
Six chapters: basics of everyday science; computers, information and communication technology; defence and space technology in India; genetics, biotechnology and nanotechnology; science and technology policies and government programmes; and recent advances, Indian contributors and indigenisation.
Is science and technology part of the RAS Prelims syllabus?
Yes. The RPSC paper is called General Knowledge and General Science, and its syllabus lists science and technology topics along with environment, health, agriculture and government programmes, so questions can come from any of these areas.
How should I prepare science for RAS Prelims?
Revise the concepts by examples, then learn the missions, schemes and scientists with their year and organisation. Attempt each chapter, read the explanations and keep a list of the facts you missed.