ISRO Successfully Tests Semi-Cryogenic Engine for Future Heavy-Lift Rockets
ISRO has achieved a major milestone by successfully conducting a long-duration test of its indigenous semi-cryogenic engine at Mahendragiri.
2-Minute Summary (TL;DR)
- ISRO tested the semi-cryogenic engine for 150 seconds at Mahendragiri.
- The engine uses a combination of Liquid Oxygen and Kerosene.
- It is intended to enhance the payload capacity of LVM3 and future rockets.
- Semi-cryogenic technology is more cost-effective and cleaner than hypergolic fuels.
How This Topic is Tested in Competitive Exams
| Exam | Frequency | Approx. Marks | What Gets Asked |
|---|---|---|---|
| UPSC / State PCS | Medium | 5–8 | UPSC tests Science & Technology through governance: space policy, biotech regulations, cyber security. |
| SSC (CGL / CHSL / MTS) | High | 4–8 | Basic science, space missions, ISRO launches, and defence technology are standard SSC GK topics. |
| State PCS / PSC | Medium | 3–5 | Space missions, defence acquisitions, and health research appear regularly. |
What to Memorize from This Topic
- ISRO missions: satellite name, purpose, launch date, orbit type
- Defence acquisitions: system name, origin country, inducted into which force
- COVID/health research: vaccine names, institutes involved, approval status
- Technology achievements: first-ever milestones, world records, India-specific achievements
- Scientific organizations: HQ, head, purpose (CSIR, DRDO, BARC, ICAR)
Practice Questions
Q1. What propellants are used in ISRO's newly tested semi-cryogenic engine?
- Liquid Hydrogen and Liquid Oxygen
- Liquid Oxygen and Kerosene
- Hydrazine and Nitrogen Tetroxide
- Solid Fuel and Liquid Oxygen
Explanation: Semi-cryogenic engines typically use Liquid Oxygen as an oxidizer and refined Kerosene (Isrosene) as fuel.
Q2. Where is the ISRO Propulsion Complex (IPRC) located?
- Sriharikota
- Thiruvananthapuram
- Mahendragiri
- Bengaluru
Explanation: The ISRO Propulsion Complex (IPRC) is located in Mahendragiri, Tamil Nadu.
How to Prepare Science & Technology for Government Exams
For Railway exams, make flashcards for every major ISRO launch — name, payload, purpose, date. These repeat frequently.
For SSC, focus on defence acquisitions and their strategic significance rather than technical specs.
For UPSC, connect every scientific development to policy — climate targets, digital India, health policy.
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