Science & Technology Mixed Quiz: Set 7

An Indian Air Force pilot, Rakesh Sharma flew to the Soviet space station Salyut 7 aboard a Soyuz spacecraft in April 1984 as part of a joint mission and spent about a week in orbit, carrying out experiments in biology and remote sensing.

The Prime Minister announced the National Hydrogen Mission in his Independence Day speech from the Red Fort on 15 August 2021, with the aim of making India a hub for producing and exporting green hydrogen.

BrahMos is built by BrahMos Aerospace, a joint venture formed in 1998 between DRDO and the Russian firm NPO Mashinostroyeniya, and the name joins a great river of each country.

Shaurya is the land based version of the submarine launched K-15 Sagarika, and it is stored and fired from a sealed canister, which lets it be moved by road and launched at short notice.

Nag is a third generation anti-tank guided missile of the fire and forget kind, which means the operator can leave cover once the missile has locked on to the target.

The Specific Absorption Rate measures how much radio energy from a handset the body takes in, in watts per kilogram of tissue.

DRDO was formed in that year by bringing together the Technical Development Establishment of the Indian Army, the Directorate of Technical Development and Production and the Defence Science Organisation, so that defence research would be done under one roof.

Bias in an artificial intelligence system is traced to three sources, the data it learns from, the algorithm that learns, and the people who build and use it; ability is not one of them, because the skill of a model is a measure of how well it performs, not a…

Akash was one of the five missiles of the IGMDP and is meant to destroy aircraft and helicopters at medium range.

The Integrated Guided Missile Development Programme, usually written IGMDP, was approved in 1983 and placed under the Defence Research and Development Organisation, with A. P. J. Abdul Kalam as its head.

Nirbhay flies below the speed of sound but for a much greater distance than BrahMos, staying low to avoid radar, and it can change course in flight and loiter over an area before striking.

STUDSAT, short for Student Satellite, was the first pico satellite built in India. A pico satellite is one that weighs under about one kilogram, and STUDSAT weighed less than that.

Astra is fired from a fighter aircraft at another aircraft that is still beyond the pilot's sight, which is what beyond visual range means, and it uses an active radar seeker in its final phase.

Sputnik 1 was launched on 4 October 1957 and became the first artificial satellite to circle the earth, sending out a simple radio signal that stations across the world could hear.

Astra is a beyond visual range air-to-air missile, which means it is fired from a fighter aircraft at an enemy aircraft the pilot cannot see with the eye, using radar to find and follow the target.

PSLV-C37 carried the Cartosat-2 series satellite as its main passenger along with two Indian nano-satellites and 101 small foreign satellites, releasing all of them one after another from its restartable liquid fourth stage.

Agni-V is a three-stage solid-fuelled missile with a range beyond five thousand kilometres, which places it in the intercontinental ballistic missile class.

In Mission Shakti, on 27 March 2019, an interceptor developed for ballistic missile defence was used to destroy one of India's own satellites in low earth orbit, showing that the country could strike a target in space.

K-15, called Sagarika, is the first of the K series of submarine-launched ballistic missiles, developed for the Arihant class of nuclear powered submarines, and the longer-ranged K-4 follows it in the same family.

Trishul was designed as a quick reaction weapon to protect warships and forward army positions from low flying aircraft and from sea skimming missiles, so it needed very fast response over a short distance rather than long reach.