Examine the following statements about the SSLV-D2 mission and select the…
2025
Examine the following statements about the SSLV-D2 mission and select the correct option:
Statement 1: SSLV-D2 inserted EOS-07, Janus-1, and AzaadiSAT-2 into a 450 km circular orbit utilizing a three-stage vehicle powered entirely by liquid propulsion.
Statement 2: The SSLV-D2 mission showcased rapid deployment capability with low turnaround time and limited ground infrastructure needs.
Answer: B. Only Statement 2 is correct — Concept: A statement that bundles several claims together is true only when every claim inside it is true; a single false clause makes the entire statement…
- A.
Only Statement 1 is correct
- B.
Only Statement 2 is correct
- C.
1 and 2 are correct
- D.
Neither 1 nor 2 are correct
Attempted by 3 students.
Show answer & explanation
Correct answer: B
Concept: A statement that bundles several claims together is true only when every claim inside it is true; a single false clause makes the entire statement false. For a launch-vehicle statement, two independent things have to be checked: the mission outcome, meaning the orbit the payloads actually reached, and the vehicle architecture, meaning how many stages it has and what propellant each stage burns.
Application: Test each statement clause by clause against the published flight record.
Statement 1 bundles an outcome claim with an architecture claim. The outcome claim is accurate: on 10 February 2023 SSLV-D2 injected EOS-07, Janus-1 and AzaadiSAT-2 into the intended 450 km circular orbit, and ISRO records that flight as successful. The architecture claim is not accurate: SSLV is built from three solid-propellant stages (SS1, SS2 and SS3) topped by a small liquid-propellant Velocity Trimming Module (VTM) that only trims the final velocity for precise injection. Since one clause is false, the whole of Statement 1 is false.
Statement 2 restates SSLV's published design brief: low cost, low turnaround time, launch-on-demand flexibility, minimal launch infrastructure and the ability to carry several small satellites on one flight. It is accurate as written.
Statement | Claim examined | Finding |
|---|---|---|
Statement 1 | 450 km circular orbit for EOS-07, Janus-1 and AzaadiSAT-2 | Matches ISRO's SSLV-D2 flight record |
Statement 1 | Three stages powered entirely by liquid propulsion | Does not hold: three solid stages plus a liquid Velocity Trimming Module |
Statement 2 | Low turnaround time, limited ground infrastructure | Matches SSLV's stated design goals |
Cross-check: The usual trap is to confuse this flight with SSLV-D1 (7 August 2022), the first developmental flight, whose terminal phase left its payloads in an unstable elliptical orbit. That orbital failure belongs to D1; D2 was the corrected flight and did reach the intended circular orbit. Statement 1 therefore breaks down on its propulsion clause, not on its orbit clause, and rejecting a statement for the wrong reason lands on the right answer only by luck.
Statement 1 is false and Statement 2 is true, so only Statement 2 is correct.