Science & Technology Mixed Quiz: Set 38

Besides location, GPS satellites broadcast extremely precise time, and mobile networks, banks and power grids all depend on that timing.

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.

Mission Shakti was India's anti-satellite (ASAT) missile test, carried out by DRDO on 27 March 2019. In the test, a Ballistic Missile Defence interceptor launched from Dr A.P.J.

This institute of the Department of Atomic Energy is the national centre for plasma and fusion research, it houses the domestic agency ITER-India that supplies India share of the machine, and it operates India own tokamaks Aditya and SST-1, the Steady State Superconducting Tokamak.

Both statements swap the features of ballistic and cruise missiles. A ballistic missile is rocket-powered only in the first, boost phase; after that it follows a high, curved, mostly unpowered path, re-entering the atmosphere at very high speed.

Certain crystals develop a voltage across their faces when they are mechanically squeezed, and conversely change shape when a voltage is applied.

Bollgard I and Bollgard II are Bt cotton technologies that make the cotton plant resistant to bollworms. Bt cotton carries genes taken from the soil bacterium Bacillus thuringiensis, which make Cry proteins that are toxic to the larvae of bollworms.

Gordon Moore, a co-founder of Intel, observed in 1965 that the number of components that could be packed economically into an integrated circuit was doubling at a steady rate, and the observation, later quoted as a doubling roughly every two years, became the planning rule of the whole industry.

All four are high-performance computing systems built or installed in India for research, weather forecasting and artificial intelligence. PARAM Siddhi-AI was built by C-DAC under the National Supercomputing Mission and is installed at C-DAC, Pune.

Pratyush was commissioned in 2018 under the Ministry of Earth Sciences and is the larger of the two machines the ministry uses for weather and climate modelling.

Green hydrogen is chemically the same as any hydrogen, so it can be burnt in engines, mixed with natural gas or used in fuel cells.

Nitinol is an alloy of roughly equal parts nickel and titanium, and even its name records this, being formed from nickel, titanium and the Naval Ordnance Laboratory where it was developed.

Pairs I and III are correct; the IL-76 is a heavy transport aircraft, not a supersonic fighter.

INSPIRE stands for Innovation in Science Pursuit for Inspired Research and was launched by the Department of Science and Technology in 2008 to draw young people to science.

Bitcoin is a decentralised peer-to-peer currency that no central bank issues or tracks, and payments are made between addresses rather than named people.

Phishing uses a message that looks as though it comes from a trusted institution, so that the reader voluntarily gives up credentials; the same fraud carried out by telephone call is called vishing and by text message smishing.

Train 18, India's first indigenous semi-high-speed train set, was named Vande Bharat Express in January 2019. Train 18 was designed and built by the Integral Coach Factory in Chennai and got its name because it was planned for 2018.

Aerial metagenomics reads all the DNA floating in the air of a place together. Every living thing sheds traces of DNA through skin cells, hair, pollen, spores and droppings, and this environmental DNA, or eDNA, drifts in the air.

The United States, not Brazil, is the world's largest ethanol producer, while the feedstocks named in Statement II are right.

Only blockchain is matched with its right field. Belle II is a particle physics experiment at the SuperKEKB electron-positron collider in Tsukuba, Japan; it studies B mesons to look for physics beyond the Standard Model, and Indian institutes such as TIFR take part in it.