UPSC Prelims 2027 Practice – 15 UPSC Level MCQs
4 October 2026 • Static + Current Affairs • Answers & Explanations
2. India supports more than half of the world's wild Asian elephant population.
3. The 2021–25 estimation exercise estimated approximately 22,446 wild elephants.
4. Project Elephant primarily deals with captive elephants in zoological parks.
Project Elephant focuses on conservation of wild Asian elephants, their habitats and migration corridors. The recent synchronous estimation adopted a science-based, standardised assessment framework.
UPSC Trap: Project Elephant is a wildlife-conservation programme, not a zoo-management programme. Official Source: PIB – Wildlife Conservation2. It will study the atmosphere and ionosphere of Venus.
3. It will investigate surface composition and geological processes.
4. Its primary objective is to land Indian astronauts on Venus.
The Venus Orbiter Mission is an orbital planetary-science mission designed to study Venus' surface, geology, atmosphere, ionosphere and interaction with solar activity.
Orbiter mission ≠ human landing mission. Official Source: PIB – India's Space Programme2. It supervises elections to Parliament and State Legislatures.
3. It conducts elections to Panchayats and Municipalities.
4. It supervises elections to the offices of President and Vice-President.
Local-body elections are supervised by State Election Commissions rather than the Election Commission of India.
ECI ≠ State Election Commission.2. They were added through the 42nd Constitutional Amendment.
3. Parliament may make laws to give effect to certain Fundamental Duties.
4. Every Fundamental Duty is directly enforceable through a writ petition.
Fundamental Duties are non-justiciable by themselves, although legislation may give legal effect to conduct connected with some of these duties.
2. Dated Government securities generally have longer maturities.
3. Government securities can be traded in the secondary market.
4. Treasury Bills always pay a fixed annual coupon.
Treasury Bills are zero-coupon instruments issued at a discount and redeemed at face value. They do not pay a conventional annual coupon.
2. RBI purchase of foreign currency from the market
3. Persistent capital outflows exceeding inflows
4. Receipt of foreign-currency loans by the Government
Foreign-currency inflows can add to reserves when absorbed by the central bank. Large net capital outflows generally exert the opposite pressure.
2. Rohtang Pass — Himachal Pradesh
3. Jelep La — Sikkim
4. Palghat Gap — Eastern Himalayas
Palghat Gap lies between the Nilgiri Hills and Anaimalai Hills in the Western Ghats, not in the Eastern Himalayas.
2. Removal of a keystone species can significantly alter ecosystem structure.
3. Every apex predator is necessarily a keystone species.
4. Keystone species may influence food-web relationships.
A keystone species is defined by its ecological influence, not simply its trophic position. Therefore, not every apex predator automatically qualifies.
2. During bleaching, corals may lose their symbiotic zooxanthellae.
3. Every bleaching event immediately kills the coral colony.
4. Ocean warming can increase the risk of mass bleaching events.
Bleached coral is stressed, but it is not necessarily dead. Recovery is possible if favourable environmental conditions return sufficiently quickly.
Bleaching ≠ automatic coral death.2. Battery-management systems can help monitor temperature and state of charge.
3. Thermal runaway can pose a safety risk in damaged or improperly managed cells.
4. Lithium-ion batteries contain no electrolyte.
Lithium-ion cells contain an electrolyte through which lithium ions move between electrodes.
2. Merging compact objects such as black holes can generate detectable gravitational waves.
3. They travel through vacuum only if accompanied by electromagnetic radiation.
4. Laser interferometers can be used to detect them.
Gravitational waves propagate independently of electromagnetic radiation and can reveal events that may produce little or no light.
2. Brahmi script was used in several parts of the empire.
3. Kharosthi script was used in parts of the north-west.
4. All Ashokan inscriptions were composed exclusively in Sanskrit.
Ashokan inscriptions display linguistic and script diversity, including Prakrit, Brahmi and Kharosthi, along with some Greek and Aramaic inscriptions.
2. Servants of India Society — Gopal Krishna Gokhale
3. Forward Bloc — Subhas Chandra Bose
4. Hindustan Republican Association — Bal Gangadhar Tilak
Hindustan Republican Association was associated with revolutionaries including Ram Prasad Bismil, Sachindra Nath Sanyal and others, not Bal Gangadhar Tilak.
2. It can provide financial assistance to countries facing balance-of-payments problems.
3. Voting power of all member countries is exactly equal.
4. Special Drawing Rights are international reserve assets created by the IMF.
IMF voting power is related substantially to member quotas and is therefore not equal across countries.
2. Organic matter can improve soil structure and water-holding capacity.
3. Crop rotation with legumes may contribute biologically fixed nitrogen to the farming system.
4. Soil microorganisms have no role in nutrient cycling.
Soil microbes play a central role in decomposition, nitrogen transformations and recycling of several essential nutrients.
