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Hindi Medium: (Delhi) - GS Foundation (P+M) : 6th July 2026, 6:00 PM Hindi Medium: (Prayagraj) - GS Foundation (P+M) : 5th July 2026, 8:00 AM English Medium: (Delhi) - GS Foundation (P+M) : 20th July 2026 English Medium: (Prayagraj) - GS Foundation (P+M) : 15th July 2026, 8:00 AM Hindi Medium: (Delhi) - GS Foundation (P+M) : 6th July 2026, 6:00 PM Hindi Medium: (Prayagraj) - GS Foundation (P+M) : 5th July 2026, 8:00 AM English Medium: (Delhi) - GS Foundation (P+M) : 20th July 2026 English Medium: (Prayagraj) - GS Foundation (P+M) : 15th July 2026, 8:00 AM

CE 20 Engine

  • This is the largest cryogenic engine built by ISRO.
  • This is India's first engine with gas generator cycle.
  • It has received safety certificate for Gaganyaan mission after several tests.
  • This engine was used for Chandrayaan-3 mission.
  • In cryogenic technology, liquid hydrogen is used as fuel and liquid oxygen as oxidant.
  • Normally hydrogen gas turns into liquid state at -253°C and oxygen gas turns into liquid state at -183°C.

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