UPSC Prelims 2025
Get UPSC Prelims Previous Year Question (PYQ) Papers with detailed explanations, mindmaps, organized year-wise and subject-wise for GS.
- Science & Technology
GPS-Aided Geo Augmented Navigation (GAGAN) uses a system of ground 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. It will provide benefits only in aviation but not in other modes of transportation.
Select the correct answer using the code given below.
View Answer for: GPS-Aided Geo Augmented Navigation (GAGAN) uses a system of ground 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. It will provide benefits only in aviation but not in other modes of transportation.Select the correct answer using the code given below.GPS-Aided Geo Augmented Navigation (GAGAN) uses a system of ground 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. It will provide benefits only in aviation but not in other modes of transportation.
Select the correct answer using the code given below.
- Science & Technology
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 station section.
Which of the statements given above are not correct?
View Answer for: 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 station section.Which of the statements given above are not correct?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 station section.
Which of the statements given above are not correct?
- Science & Technology
Consider the following space missions:
I. Axiom-4 II. SpaDeX III. Gaganyaan
How many of the space missions given above encourage and support micro-gravity research?
View Answer for: Consider the following space missions:I. Axiom-4 II. SpaDeX III. GaganyaanHow many of the space missions given above encourage and support micro-gravity research?Consider the following space missions:
I. Axiom-4 II. SpaDeX III. Gaganyaan
How many of the space missions given above encourage and support micro-gravity research?
- Science & Technology
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?
View Answer for: 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?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?
- Science & Technology
With reference to India's defence, consider the following pairs:
Aircraft type – Description I. Dornier-228 : Maritime patrol aircraft II. IL-76 : Supersonic combat aircraft III. C-17 Globemaster III : Military transport aircraft
How many of the pairs given above are correctly matched?
View Answer for: With reference to India's defence, consider the following pairs:Aircraft type – Description I. Dornier-228 : Maritime patrol aircraft II. IL-76 : Supersonic combat aircraft III. C-17 Globemaster III : Military transport aircraftHow many of the pairs given above are correctly matched?With reference to India's defence, consider the following pairs:
Aircraft type – Description I. Dornier-228 : Maritime patrol aircraft II. IL-76 : Supersonic combat aircraft III. C-17 Globemaster III : Military transport aircraft
How many of the pairs given above are correctly matched?
- Science & Technology
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 a source of power supply.
How many of the statements given above are correct?
View Answer for: 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 a source of power supply.How many of the statements given above are correct?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 a source of power supply.
How many of the statements given above are correct?
- Science & Technology
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?
View Answer for: 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?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?
- Science & Technology
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?
View Answer for: Consider the following types of vehicles:I. Full battery electric vehicles II. Hydrogen fuel cell vehicles III. Fuel cell electric hybrid vehiclesHow many of the above are considered as alternative (powertrain) vehicles?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?
- Science & Technology
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?
View Answer for: 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?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?
- Science & Technology
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.
Which of the statements given above are correct?
View Answer for: 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.Which of the statements given above are correct?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.
Which of the statements given above are correct?
- Science & Technology
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?
View Answer for: 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?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?
- Science & Technology
Consider the following substances:
I. Ethanol
II. Nitroglycerine
III. Urea
Coal gasification technology can be used in the production of how many of them?
View Answer for: Consider the following substances:I. EthanolII. NitroglycerineIII. UreaCoal gasification technology can be used in the production of how many of them?Consider the following substances:
I. Ethanol
II. Nitroglycerine
III. Urea
Coal gasification technology can be used in the production of how many of them?
- Science & Technology
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 battery cathodes?
View Answer for: In the context of electric vehicle batteries, consider the following elements:I. Cobalt II. Graphite III. Lithium IV. NickelHow many of the above usually make up battery cathodes?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 battery cathodes?
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