Science & Technology Mixed Quiz: Set 8

GTRE is the DRDO laboratory for aero engines, and the Kaveri turbofan was taken up there for the Tejas light combat aircraft.

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.

Nirbhay is a long-range cruise missile that flies below the speed of sound, which is what subsonic means, and it is powered by a small turbofan engine that keeps it flying throughout its journey.

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

The Tarapur Atomic Power Station in Maharashtra was commissioned in 1969 with American assistance and was the first nuclear power station in India as well as in Asia; its first two units are boiling water reactors, a design used nowhere else in the country.

The American computer scientist John McCarthy is called the father of artificial intelligence because he coined the term itself in his proposal for the Dartmouth summer research project of 1956, the meeting at which the field was born.

The cry genes of Bt cotton come from Bacillus thuringiensis, a soil bacterium that forms crystal protein during sporulation; the protein is inactive as eaten but becomes a toxin in the alkaline gut of the bollworm, which is why the plant resists the pest.

The Integrated Guided Missile Development Programme was approved in 1983 and Kalam, then at the Defence Research and Development Laboratory, was made its head.

CVRDE, near Chennai, is the DRDO laboratory for armoured fighting vehicles, and the Arjun main battle tank was designed there and is produced at the Heavy Vehicles Factory in the same town.

ChaSTE was carried on the Vikram lander of Chandrayaan-3. It has a probe fitted with a set of temperature sensors, which was pushed into the lunar soil to a depth of about ten centimetres near the south polar region.

The Integrated Test Range at Chandipur, on the Odisha coast near Balasore, is the main missile testing facility of the DRDO, and many launches are also made from Dr A. P. J. Abdul Kalam Island off the same coast, which was earlier called Wheeler Island.

The Soviet cosmonaut Yuri Gagarin circled the earth once aboard Vostok 1 on 12 April 1961 and became the first human being in space, a flight that lasted about one hour and forty eight minutes.

The CANDU design, from which India's pressurised heavy water reactors descend, burns natural uranium, and natural uranium contains only about seven parts in a thousand of the fissile isotope uranium 235.

The correct answer is B, IRS-1A, launched in 1988, which began the Indian Remote Sensing series and was the first such satellite whose data was used routinely for crop assessment, forest mapping, water resources and land use rather than only for experiment.

Approved in 2002, it is the only genetically modified crop cleared for commercial cultivation by Indian farmers, and it is grown for fibre rather than as food.

The lander is named Vikram after Vikram Sarabhai, the physicist who founded the Indian space programme and is called its father.

In a scramjet, short for supersonic combustion ramjet, the air taken in from the atmosphere stays supersonic while the fuel is burnt in it, which is what allows sustained flight at hypersonic speed.

Mission Shakti was conducted on 27 March 2019, when a DRDO interceptor launched from Dr A. P. J. Abdul Kalam Island destroyed a satellite of India's own in a low earth orbit.

In a boiling water reactor, the design used at Tarapur, ordinary water is allowed to boil inside the reactor vessel itself, so the coolant leaving the core is a mixture of water and steam; the steam is separated at the top and driven straight to the turbine, without the separate…

He devised the polymerase chain reaction, which copies a selected stretch of DNA millions of times through repeated cycles of heating and cooling, using the heat resistant Taq polymerase, and he received the Nobel Prize in Chemistry for it.