What is tunnel hood technology used for in high-speed rail projects?

Tunnel hood technology is designed to mitigate the tunnel boom effect caused by pressure waves generated by high-speed trains. It helps control air pressure changes, reduce noise, improve aerodynamic performance, and enhance passenger comfort.

Why are tunnel hoods installed in the Mumbai-Ahmedabad Bullet Train project?

Tunnel hoods are installed to minimise tunnel boom and noise generated by high-speed trains, reduce disturbance to surrounding communities, and support safe and efficient train operations at very high speeds.

Helium-3 is a rare isotope of helium that has applications in quantum computing, supercooling technologies, dark matter research, and future nuclear fusion reactors.

Why is Helium-3 considered valuable?

Helium-3 is valuable because of its potential applications in quantum computing, low-temperature physics, particle research, and clean fusion energy technologies.

Where is Helium-3 found on the Moon?

Helium-3 is found in the Moon's topmost layer called the regolith, where it accumulated over billions of years due to solar wind implantation.

What causes granulomatous amoebic encephalitis (GAE)?

Granulomatous amoebic encephalitis is caused by Acanthamoeba, a free-living amoeba commonly found in contaminated water.

Ariane 6 is Europe's latest heavy-lift launch vehicle designed for scientific, commercial, and exploration missions.

What fuel does Ariane 6 use?

Ariane 6 uses liquid hydrogen and liquid oxygen engines in its two-stage rocket configuration.

What is the H3 rocket?

The H3 rocket is Japan's next-generation launch vehicle developed by JAXA and Mitsubishi Heavy Industries.

Which rocket does the H3 replace?

The H3 launch vehicle is designed to replace Japan's H-2A rocket.

Daily UPSC Prelims MCQs - Science & Tech. - 24th June 2026

Jigyashu Mishra
2 days ago
1 min read

Updated: 1 day ago

Test your UPSC CSE 2027 preparation with today’s Science & Technology (Every wednesday) Quiz — covering tunnel hood technology, Helium-3, granulomatous amoebic encephalitis’ (GAE), Ariane 6 rocket and more.

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