Q. ISRO recently conducted the second short hot test of the semi-cryogenic engine for which launch vehicle?
Answer: Launch Vehicle Mark-3 (LVM3)
Notes: The Indian Space Research Organisation (ISRO) has successfully conducted the second short hot test of the semicryogenic engine that will power the Semicryogenic booster stage of the Launch Vehicle Mark-3 (LVM3). A semicryogenic engine uses a cryogenic oxidizer like Liquid Oxygen and a hydrocarbon-based fuel like kerosene. It combines the advantages of cryogenic and conventional engines, offering better efficiency and operational simplicity. In comparison, a fully cryogenic engine uses both fuel and oxidizer in liquid form, like Liquid Hydrogen and Liquid Oxygen, giving 100% efficiency without causing greenhouse gas emissions. This successful test marks a key step towards upgrading LVM3 for future heavy-lift missions.

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