Free practice for SSC, UPSC, Banking & Railway exams. No login required.
Answer: GSLV-F14
GSLV-F14 successfully deployed INSAT-3DS on Feb 17, 2024, enhancing weather forecasting and disaster warning capabilities over Indian Ocean Region.
Answer: True
Blazar emission is Doppler-boosted due to relativistic jet alignment with line-of-sight, causing rapid variability and high-energy dominance.
Answer: Chiaki Mukai
Japanese astronaut Chiaki Mukai flew aboard STS-65 in July 1994; Kalpana Chawla (Indian-origin US citizen) flew later in 1997.
Answer: True - used in GPS III/BeiDou
Ka-band cross-links allow satellites to range each other, improving ephemeris accuracy and reducing ground segment dependency; implemented in modern GNSS.
Answer: 13
IADC comprises 13 national/international space agencies coordinating debris mitigation standards; ISRO joined in 2000s contributing tracking data.
Answer: True
Ceres resides in main asteroid belt between Mars/Jupiter; all other recognized dwarf planets (Pluto, Eris, Haumea, Makemake) are trans-Neptunian.
Answer: All of the above
Lunar Prospector (1998) detected H signature; Chandrayaan-1 MIP/M3 confirmed OH/H₂O; LCROSS impact (2009) directly sampled ice-rich ejecta.
Answer: Disk migration or tidal interactions
Type I/II disk migration or high-eccentricity tidal circularization explains hot Jupiter presence interior to snow line where gas giant formation is unlikely.
Answer: Liquid Propulsion System Project
LPSC evolved from LPSP established in 1980s for Vikas engine development; renamed LPSC in 1990s integrating liquid/cryogenic stage responsibilities.
Answer: True
Triple-junction GaInP/GaAs/Ge cells capture broader solar spectrum, reaching 32-35% efficiency vs ~20% for silicon; standard on GEO/deep space missions.
Answer: Mimas
2:1 mean-motion resonance with Mimas clears particles from Cassini Division; gravitational perturbations prevent stable orbits in this region.
Answer: Apollo 13
Apollo 13's Service Module O₂ tank exploded Apr 13, 1970; crew aborted landing, used LM as lifeboat, and returned safely via free-return trajectory.
Answer: 20
NavIC SPS provides <20 m horizontal accuracy over India and surrounding regions; encrypted Restricted Service offers higher precision for authorized users.
Answer: True
VLBI/optical interferometry synthesizes aperture equal to baseline length; EHT achieved µas resolution imaging black holes using global telescope network.
Answer: Gentle accretion in primordial disk
Arrokoth's bilobate shape with aligned lobes indicates low-speed merger of two planetesimals in cold classical Kuiper Belt, preserving early solar system conditions.
Answer: Titan
Titan's surface pressure is 1.5 bar (vs Mars' 0.006 bar), composed of N₂/CH₄ with organic haze layers; only moon with dense atmosphere and active hydrological cycle.
Answer: Sriharikota High Altitude Range
SHAR was renamed Satish Dhawan Space Centre (SDSC) in 2002 honoring former ISRO chairman; SHAR acronym still appears in technical documentation.
Answer: True
C-C composites retain strength above 2000°C without melting, ideal for re-entry vehicle hotspots; used in Space Shuttle nose cone and wing leading edges.
Answer: 5.8 m
LISS-IV provides 5.8 m multispectral imagery over 23 km swath or 56 m over 700 km swath, supporting agriculture, forestry, and urban planning.
Answer: z=20-6
First stars/galaxies ionized neutral hydrogen between z~20-6 (~180 Myr-1 Gyr post-Big Bang), ending cosmic dark ages; confirmed by CMB polarization and quasar spectra.