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Generate QuizTechnology – GK Questions
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Which technology captures CO2 directly from ambient air for storage or utilization?
- Point Source CCS
- Direct Air Capture
- Bioenergy CCS
- Enhanced Weathering
Answer: Direct Air Capture
DAC uses chemical sorbents to extract CO2 from ambient air, enabling carbon removal independent of emission sources. Energy-intensive but critical for net-zero pathways. India exploring DAC under climate strategy.
The process of using lunar resources for construction and manufacturing is called In-________ Resource Utilization.
- Transaction / AML
- Situ / ISRU
- Carbon / Emissions
- Responsible
Answer: Situ / ISRU
ISRU extracts and processes lunar materials (regolith, water ice) for construction, life support, and propellant production. Critical for sustainable lunar bases and deep space exploration economics.
Which technology enables high-throughput satellites to serve multiple beams simultaneously?
- Frequency Reuse
- Spot Beams
- Adaptive Coding
- All of these
Answer: All of these
HTS combines: spot beams for focused coverage, frequency reuse for capacity multiplication, adaptive coding for link optimization. Enables 100+ Gbps throughput for broadband, backhaul, and enterprise services.
Cubesats are standardized small satellites measuring 10x10x10 cm per unit.
- True
- False
Answer: True
Cubesat standard (1U = 10x10x10 cm, up to 12U) enables low-cost access to space for research, technology demos, and education. India promotes Cubesats via ISRO and academic programs for capacity building.
Which lunar resource is valuable for nuclear fusion research?
- Water Ice
- Helium-3
- Rare Earth Elements
- Titanium
Answer: Helium-3
Helium-3, deposited by solar wind on lunar surface, is a potential fuel for aneutronic fusion reactors producing minimal radioactive waste. Extraction remains technologically challenging but scientifically valuable.
The technique of dynamically allocating bandwidth based on demand in satellite networks is called ________ Access.
- Gate-All-Around / GAA
- Demand Assigned Multiple / DAMA
- Incident
- Common
Answer: Demand Assigned Multiple / DAMA
DAMA allocates satellite channels dynamically based on user demand, improving spectrum efficiency vs fixed allocation. Critical for cost-effective broadband services, especially in variable traffic scenarios.
Which propulsion technology enables efficient deep space missions with continuous low-thrust?
- Chemical Rockets
- Ion Propulsion
- Nuclear Thermal
- Solar Sails
Answer: Ion Propulsion
Ion thrusters use electric fields to accelerate ions, providing high specific impulse (fuel efficiency) with low thrust. Ideal for deep space missions: Dawn, BepiColombo. ISRO developing electric propulsion for future missions.
The Artemis program aims to establish a sustainable human presence on the Moon by late 2020s.
- True
- False
Answer: True
NASA's Artemis program: Artemis I (uncrewed test), Artemis II (crewed flyby), Artemis III (lunar landing). Includes Gateway lunar station and international partnerships. India signed Artemis Accords for cooperative exploration.
Which frequency band offers best building penetration for mobile satellite services?
- Ka-band
- Ku-band
- L-band
- V-band
Answer: L-band
L-band (1-2 GHz) has longer wavelength enabling better penetration through buildings, foliage, and weather. Used for mobile satellite services, GPS, and emergency communications. Trade-off: lower bandwidth vs higher frequencies.
The Indian satellite series dedicated to Earth observation and remote sensing is called ________.
- Device Posture
- CARTOSAT / EOS
- DOMContentLoaded / load
- Make
Answer: CARTOSAT / EOS
CARTOSAT series provides high-resolution imagery for cartography, urban planning, and strategic applications. EOS (Earth Observation Satellite) series focuses on climate, agriculture, and disaster monitoring. Critical for geospatial technology questions.
Geostationary satellites orbit at approximately 35,786 km above Earth's equator.
- True
- False
Answer: True
GEO satellites match Earth's rotation, appearing stationary from ground. Advantages: continuous coverage, simple ground equipment. Disadvantages: high latency (~250ms), polar coverage gaps. Critical for satellite communication planning.
Which ISRO mission will study Venus's atmosphere and surface?
- Shukrayaan-1
- Mangalyaan-2
- Aditya-L2
- Gaganyaan-2
Answer: Shukrayaan-1
Shukrayaan-1 is India's planned Venus orbiter mission (target launch ~2028) to study the planet's thick atmosphere, surface processes, and solar wind interactions. Will carry Indian and international payloads for comprehensive planetary science.
Which standard ensures carbon offset projects deliver real, additional, and permanent emission reductions?
- Gold Standard
- Verra VCS
- Both A and B
- Neither
Answer: Both A and B
Gold Standard and Verra's Verified Carbon Standard certify offset projects with rigorous methodologies: additionality, permanence, leakage prevention. Critical for carbon market integrity and climate finance.
Methane capture from landfills and agriculture reduces potent greenhouse gas emissions.
- True
- False
Answer: True
Methane (CH4) has 28-36x global warming potential of CO2 over 100 years. Capture technologies: anaerobic digesters, landfill gas collection, rice cultivation alternatives. Critical for near-term climate mitigation.
Which resource on the Moon is valuable for producing rocket propellant?
- Helium-3
- Water Ice
- Rare Earth Elements
- All of these
Answer: Water Ice
Lunar water ice (south pole craters) can be electrolyzed into hydrogen/oxygen for rocket fuel. Enables in-situ resource utilization for sustainable lunar exploration and deep space missions.
The technique of using multiple frequency bands to increase satellite network capacity is called ________ Reuse.
- Make
- Shor's
- AI-based / Machine Learning
- Frequency
Answer: Frequency
Frequency reuse assigns same frequencies to non-interfering beams/regions, multiplying network capacity. Critical for high-throughput satellites and LEO constellations serving global broadband.
Which Indian initiative enables private companies to provide satellite-based services?
- IN-SPACe
- NSIL
- Both A and B
- Neither
Answer: Both A and B
IN-SPACe authorizes private space activities; NSIL commercializes ISRO technologies via industry partnerships. Together they enable India's growing commercial space ecosystem.
Hash-based signatures like SPHINCS+ are considered quantum-resistant but have larger signature sizes.
- True
- False
Answer: True
SPHINCS+ (NIST PQC standard) uses hash functions believed quantum-resistant. Trade-off: larger signatures (~8-49 KB) vs classical ECDSA (~64 bytes). Critical for bandwidth-constrained applications.
Which quantum application enables simulation of complex molecular interactions for drug discovery?
- Quantum Computing
- Quantum Sensing
- Quantum Communication
- Quantum Cryptography
Answer: Quantum Computing
Quantum computers simulate quantum systems (molecules, materials) exponentially faster than classical computers for specific problems. Critical for drug discovery, materials science, and chemistry research.
The process of documenting AI system decisions for audit and review is called AI ________.
- Digital India / UPI
- Logging / Audit Trail
- Ethical / CEH
- -a
Answer: Logging / Audit Trail
AI logging records inputs, model versions, predictions, and outcomes for accountability, debugging, and regulatory compliance. Critical for high-stakes applications: finance, healthcare, criminal justice.