Science & Technology Mixed Quiz: Set 40

PSLV mainly carries Earth observation satellites to low orbits, GSLV was built for communication satellites, and the other two statements describe the rockets wrongly.

LiFi (Light Fidelity) sends data wirelessly by switching LED light on and off far too fast for the eye to notice, and it can be many times faster than WiFi.

Pragyan was a six-wheeled rover carried inside the Vikram lander. Chandrayaan-2 was launched on 22 July 2019 by the GSLV Mk III with an orbiter, the Vikram lander and the Pragyan rover.

Fusion is the joining of two light nuclei into a heavier one, with a neutron or other products released and a large amount of energy appearing because the mass of the product is slightly less than the mass of the reactants; in ITER the reaction fuses deuterium and tritium into…

Kaveri is the turbofan aero-engine developed by the Gas Turbine Research Establishment of DRDO in Bengaluru. The Kaveri project began in the late 1980s to power the Light Combat Aircraft Tejas.

XR is the collective name for augmented reality, virtual reality and mixed reality together, and is used whenever a statement is meant to cover all the technologies that blend the physical world with digital content.

All three statements describe the weapons correctly. HAMMER, short for Highly Agile Modular Munition Extended Range, is a French precision-guided air-to-ground bomb kit made by Safran; India bought it to arm its Rafale jets, which can strike targets tens of kilometres away with it.

Chandrayaan-3 weighed close to 3,900 kg at lift-off, far beyond the reach of any lighter Indian rocket, so it flew on LVM3, the vehicle earlier named GSLV Mk III.

Somatic cell nuclear transfer, or SCNT, is the technique used to clone an animal. Scientists take an egg cell and remove its nucleus.

The Soviet cosmonaut Yuri Gagarin orbited the Earth once aboard Vostok 1 on 12 April 1961, becoming the first human being in space.

Project 75 India, or P-75I, is the Indian Navy's plan to build six advanced conventional diesel-electric submarines in India. Its key requirement is Air Independent Propulsion, which lets a conventional submarine stay submerged for much longer without surfacing to charge its batteries.

The Mars Orbiter Mission was launched on 5 November 2013 by a PSLV and reached the orbit of Mars on 24 September 2014.

Ethereum, Solana, Polkadot and Tether are all names from the world of blockchain-based digital currencies. A cryptocurrency is a digital asset recorded on a blockchain, a shared ledger kept by many computers, and secured by cryptography rather than issued by a central bank.

Vyommitra has a head, a face, arms and a torso but no legs, which is why it is called half humanoid, and it has been built to ride an uncrewed flight of the Gaganyaan human spaceflight programme, operate switches, watch the panels and report conditions as a crew member would.

DNA barcoding tells us which species a sample belongs to, not how old the organism is.

The board was constituted in 1996 as a statutory body under that Act and works under the Department of Science and Technology, providing loans and equity to Indian companies that take home-grown technology to the market.

The merger of two black holes sent out ripples in space-time, and catching those ripples was the first direct detection of gravitational waves.

3D printing, or additive manufacturing, builds objects layer by layer from a digital design, and it is used in all five fields listed.

THAAD is a United States ballistic missile defence system built to shoot down missiles in the last stage of their flight.

Pinaka and Smerch are both multi-barrel rocket launchers used by the Indian Army's artillery. Pinaka was developed by DRDO, with the Armament Research and Development Establishment at Pune as the lead laboratory, and is named after the bow of Lord Shiva.