UPSC Prelims PYQ
UPSC Prelims Science and technology Questions
108 Science and technology questions from previous UPSC Prelims papers, from the latest year backwards, each with its answer and explanation.
- Questions
- 108
- Years covered
- 2016–2026
- Exam years
- 9
- With answers
- 108
Science and technology questions by year
UPSC Prelims Science and technology Questions
1–20 of 24-
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Consider the following pairs (Plant : Description): I. Cassava : Woody shrub II. Ginger : Herb with pseudostem III. Malabar spinach : Herbaceous climber IV. Mint : Annual shrub V. Papaya : Woody shrub. How many of the above pairs are correctly matched?
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Consider the following types of vehicles: I. Full battery electric vehicles II. Hydrogen fuel cell vehicles III. Fuel cell-electric hybrid vehicles. How many of the above are considered as alternative powertrain vehicles?
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With reference to Unmanned Aerial Vehicles (UAVs), consider the following statements: I. All types of UAVs can do vertical landing. II. All types of UAVs can do automated hovering. III. All types of UAVs can use battery only as the source of power supply. How many of the statements given above are correct?
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In the context of electric vehicle batteries, consider the following elements: I. Cobalt II. Graphite III. Lithium IV. Nickel. How many of the above usually make up the cathode of the battery?
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Consider the following substances: I. Ethanol II. Nitroglycerine III. Urea. Coal gasification technology can be used in the production of how many of them?
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What is the common characteristic of the chemical substances generally known as CL-20, HMX and LLM-105, which are sometimes talked about in media?
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Consider the following statements: I. It is expected that Majorana 1 chip will enable quantum computing. II. Majorana 1 chip has been introduced by Amazon Web Services (AWS). III. Deep learning is a subset of machine learning. Which of the statements given above are correct?
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With reference to monoclonal antibodies, often mentioned in news, consider the following statements: I. They are man-made proteins. II. They stimulate immunological function due to their ability to bind to specific antigens. III. They are used in treating viral infections like that of Nipah virus. Which of the statements given above are correct?
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Consider the following statements: I. No virus can survive in ocean waters. II. No virus can infect bacteria. III. No virus can change the cellular transcriptional activity in host cells. How many of the above statements are correct?
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Consider the following statements: Statement I: Some rare earth elements are used in the manufacture of flat television screens and computer monitors. Statement II: Some rare earth elements have phosphorescent properties. Which one of the following is correct in respect of the above statements?
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Consider the following statements: I. Indian Railways have prepared a National Rail Plan (NRP) to create a 'future ready' railway system by 2028. II. 'Kavach' is an Automatic Train Protection system developed in collaboration with Germany. III. 'Kavach' system consists of RFID tags fitted on track in the station section. Which of the statements given above are not correct?
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Consider the following space missions: I. Axiom-4 II. SpaDeX III. Gaganyaan. How many of the above space missions encourage and support microgravity research?
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Artificial way of causing rainfall to reduce air pollution makes use of
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GPS-Aided Geo Augmented Navigation (GAGAN) uses a system of ground-based stations to provide necessary augmentation. Which of the following statements is/are correct in respect of GAGAN? I. It is designed to provide additional accuracy and integrity. II. It will allow more uniform and high quality air traffic management. III. Its benefits will be available only in aviation but not in other modes of transportation. Select the correct answer using the code given below.
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With reference to radioisotope thermoelectric generators (RTGs), consider the following statements:
1. RTGs are miniature fission reactors.
2. RTGs are used for powering the onboard systems of spacecraft.
3. RTGs can use Plutonium-238, which is a by-product of weapons development.
Which of the statements given above are correct? -
Consider the following statements:
Statement-I: Giant stars live much longer than dwarf stars.
Statement-II: Compared to dwarf stars, giant stars have a greater rate of nuclear reactions.
Which one of the following is correct in respect of the above statements? -
Which one of the following is synthesised in the human body that dilates blood vessels and increases blood flow?
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Consider the following activities:
1. Identification of narcotics on passengers at airports or in aircraft
2. Monitoring of precipitation
3. Tracking the migration of animals
In how many of the above activities can radars be used? -
Consider the following aircraft:
1. Rafale
2. MiG-29
3. Tejas MK-1
How many of the above are considered fifth-generation fighter aircraft?
84 more questions are premium
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