Defence & Space Technology MCQ — 657 Practice Questions with Answers

Explanation

Gaganyaan's Environmental Control and Life Support System (ECLSS) maintains an Earth-like atmosphere inside the crew module by managing the oxygen level, removing carbon dioxide and humidity, and controlling pressure, temperature, fire detection/suppression, and water/waste. ISRO developed this system indigenously for Gaganyaan's crewed mission. This makes breathable atmosphere, thermal control, and CO2 removal the best answer.

Explanation

BrahMos is jointly developed by India's DRDO and Russia's NPO Mashinostroyenia. Named after Brahmaputra and Moskva rivers. Range up to 290 km.

Explanation

ISRO successfully tested the CE20 cryogenic engine for 165 seconds at full power at sea level at Mahendragiri. This is a key milestone for the Gaganyaan human spaceflight programme. The CE20 engine powers the upper stage of the LVM3 rocket which will carry Gaganyaan astronauts.

Explanation

Aditya-L1 carries 7 scientific payloads: VELC, SUIT, SoLEXS, HEL1OS, ASPEX, PAPA, and a magnetometer. Four payloads observe the Sun directly, while three carry out in-situ measurements of particles and fields at L1.

Explanation

Army Chief Gen Upendra Dwivedi referred to the Army's transformation through Bhairav light commando battalions during the 26 July 2025 Kargil Vijay Diwas event at Dras. Therefore, Kargil Vijay Diwas 2025 is the correct occasion.