Free practice for SSC, UPSC, Banking & Railway exams. No login required.
Answer: True
CAIs in chondrites define solar system age via U-Pb dating; formed at high temperatures near proto-Sun before accretion into planetesimals.
Answer: STS-41-B
Bruce McCandless II conducted untethered EVA using MMU on Feb 7, 1984, demonstrating free-flying capability for satellite retrieval/servicing.
Answer: KARI
KOMPSAT (Korea Multi-Purpose Satellite) series provides EO/weather/tech demo capabilities; KOMPSAT-7 offers 0.5 m panchromatic resolution.
Answer: Heavy/large-volume
Deployable/inflatable heat shields enable delivery of massive payloads to Mars/Venus where rigid aeroshells are volume/mass constrained; tested in LOFTID/IRVE missions.
Answer: True
Λ in Einstein's equations corresponds to constant energy density of empty space; observational evidence favors ΛCDM model with Ω_Λ≈0.7.
Answer: Venus
Maxwell Montes rises ~11 km above Venusian mean radius on Ishtar Terra; formed by tectonic compression rather than volcanism unlike most Venusian highlands.
Answer: Thiruvananthapuram
SPL at VSSC Thiruvananthapuram studies ionosphere/thermosphere using ground-based instruments and satellite data, supporting space weather forecasting.
Answer: True
Onboard processing allows direct user-to-user routing, reducing latency and ground dependency; featured in advanced military/commercial satellites.
Answer: Centimeter-level
NISAR's interferometric SAR measures crustal deformation, ice flow, and biomass changes at cm-scale resolution every 12 days globally.
Answer: stiffness-to-weight
Aluminum/Nomex honeycomb cores bonded to face sheets provide exceptional bending stiffness at minimal mass, ideal for satellite bus and payload panels.
Answer: True
Pluto completes 2 orbits per 3 Neptune orbits; resonance ensures conjunction occurs when Pluto is near aphelion far from Neptune's orbital plane.
Answer: Venera 7
Venera 7 landed Dec 15, 1970, transmitting 23 minutes of surface data including temperature (475°C); Venera 4 was atmospheric probe only.
Answer: Roscosmos
Angara replaces Proton/Zenit with environmentally friendly RP-1/LOX propulsion; modular design covers light-to-heavy lift classes from Plesetsk/Vostochny.
Answer: Bengaluru
ISTRAC HQ in Bengaluru coordinates global network of ground stations supporting LEO/GEO/deep space missions with real-time TT&C services.
Answer: True
White dwarfs radiate stored thermal energy without fusion; cooling timescales exceed current universe age, so no black dwarfs exist yet theoretically predicted.
Answer: Solar wind and radiation pressure
Ion tail aligns with solar wind magnetic field; dust tail curves due to radiation pressure; both extend anti-sunward regardless of comet's direction of travel.
Answer: Staged combustion
SCE-200 employs oxygen-rich staged combustion cycle burning kerosene/LOX, delivering 200-ton thrust class performance for future heavy-lift vehicles.
Answer: True
Heat pipes use phase-change fluid wicking through porous structure to transport heat from hot to cold zones; essential for spacecraft thermal management.
Answer: True - on Ryugu in 2018
MINERVA-II1A/B deployed Sep 2018 hopped across Ryugu's low-gravity surface using internal rotors, returning images and temperature data.
Answer: stronger and defect-free
FSW solid-state process avoids melting/solidification defects, yielding superior mechanical properties for cryogenic tank structures in PSLV/GSLV/LVM3.