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UPSC Science & Technology PYQs 2024 | Vaidra | Vaidra
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Science & Technology UPSC PYQ 2024

17 questions from the UPSC 2024 examination.

17 questions

1Mediumprelims2 marks
Energy & Environment

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 spacecrafts. 3. RTGs can use Plutonium-238, which is a by-product of weapons development. Which of the statements given above are correct?

A1 and 2 only
B2 and 3 only
C1 and 3 only
D1, 2 and 3
2Mediumprelims2 marks
Energy & Environment

Consider the following: 1. Battery storage 2. Biomass generators 3. Fuel cells 4. Rooftop solar photovoltaic units How many of the above are considered "Distributed Energy Resources"?

AOnly one
BOnly two
COnly three
DAll four
3Mediumprelims2 marks
Biology

With reference to perfluoroalkyl and polyfluoroalkyl substances (PFAS) that are used in making many consumer products, consider the following statements: 1. PFAS are found to be widespread in drinking water, food and food packaging materials. 2. PFAS are not easily degraded in the environment. 3. Persistent exposure to PFAS can lead to bioaccumulation in animal bodies. Which of the statements given above are correct?

A1 and 2 only
B2 and 3 only
C1 and 3 only
D1, 2 and 3
4Mediumprelims2 marks
Energy & Environment

Which one of the following is the exhaust pipe emission from Fuel Cell Electric Vehicles, powered by hydrogen?

AHydrogen peroxide
BHydronium
COxygen
DWater vapour
5Mediumprelims2 marks
Defence Technology

Consider the following aircraft : 1. Rafael 2. MiG-29 3. Tejas MK-1 How many of the above are considered fifth generation fighter aircraft ?

AOnly one
BOnly two
CAll three
DNone
6Mediumprelims2 marks
Defence Technology

Which of the following is/are correctly matched in terms of equivalent rank in the three services of Indian Defence forces? Army — Airforce — Navy 1. Brigadier — Air Commodore — Commander 2. Major General — Air Vice Marshal — Vice Admiral 3. Major — Squadron Leader — Lieutenant Commander 4. Lieutenant Colonel — Group Captain — Captain Select the correct answer using the code given below:

A1 and 4
B1 and 3
C2, 3 and 4
D3 only
7Mediumprelims2 marks
Space Technology & Astronomy

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?

ABoth Statement-I and Statement-II are correct and Statement-II explains Statement-I
BBoth Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I
CStatement-I is correct, but Statement-II is incorrect
DStatement-I is incorrect, but Statement-II is correct
8Mediumprelims2 marks
Biology

Consider the following: 1. Carabid beetles 2. Centipedes 3. Flies 4. Termites 5. Wasps Parasitoid species are found in how many of the above kind of organisms?

AOnly two
BOnly three
COnly four
DAll five
9Mediumprelims2 marks
Chemistry

Which one of the following is synthesised in human body that dilates blood vessels and increases blood flow?

ANitric oxide
BNitrous oxide
CNitrogen dioxide
DNitrogen pentoxide
10Mediumprelims2 marks
Physics

Consider the following: 1. Butterflies 2. Fish 3. Frogs How many of the above have poisonous species among them?

AOnly one
BOnly two
CAll three
DNone
11Mediumprelims2 marks
Computer & Information Technology

In which of the following are hydrogels used? 1. Controlled drug delivery in patients 2. Mobile air-conditioning systems 3. Preparation of industrial lubricants Select the correct answer using the code given below:

A1 only
B1 and 2 only
C2 and 3 only
D1, 2 and 3
12Mediumprelims2 marks
Energy & Environment

Consider the following materials: 1. Agricultural residues 2. Corn grain 3. Wastewater treatment sludge 4. Wood mill waste Which of the above can be used as feedstock for producing Sustainable Aviation Fuel?

A1 and 2 only
B3 and 4 only
C1, 2, 3 and 4
D1, 3 and 4 only
13Mediumprelims2 marks
Computer & Information Technology

Recently, the term “pumped-storage hydropower” is actually and appropriately discussed in the context of which one of the following?

AIrrigation of terraced crop fields
BLift irrigation of cereal crops
CLong duration energy storage
DRainwater harvesting system
14Mediumprelims2 marks
Biotechnology & Genetics

"Membrane Bioreactors" are often discussed in the context of:

AAssisted reproductive technologies
BDrug delivery nanotechnologies
CVaccine production technologies
DWastewater treatment technologies
15Mediumprelims2 marks
Computer & Information Technology

Which one of the following words/phrases is most appropriately used to denote 'an interoperable network of 3D virtual worlds that can be accessed simultaneously by millions of users, who can exert property rights over virtual items'?

ABig data analytics
BCryptography
CMetaverse
DVirtual matrix
16Mediumprelims2 marks
Defence Technology

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 the radars be used?

AOnly one
BOnly two
CAll three
DNone
17Mediumprelims2 marks
Biology

The organisms 'Cicada, Froghopper and Pond skater' are:

ABirds
BFish
CInsects
DReptiles
Science & Technology — All Years|All Subjects