Here is Question No. 95 a part of our series on UPSC Prelims 2018
Q95. With reference to India’s satellite launch vehicles, consider the following statements:
- PSLVs launch the satellites useful for Earth resources monitoring whereas GSLVs are designed mainly to launch communication satellites.
- Satellites launched by PSLV appear to remain permanently fixed in the same position in the sky, as viewed from a particular location on Earth.
- GSLV Mk III is a four-staged launch vehicle with the first and third stages l using solid rocket motors; and the second and fourth stages using liquid rocket engines.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 and 3 only
(c) 1 and 2 only
(d) 3 only
Answer: A
- Statement 1 is correct: The GSLV is designed mainly to deliver the communication satellites to the highly elliptical Geosynchronous Transfer Orbit (GTO) whereas PSLVs launch satellites useful for Earth resources monitoring.
- Statement 2 is not correct: PSLV is designed mainly to deliver the “earth observation” or “Remote-sensing” satellites with lift-off mass of up to about 1750 Kg to Sun-Synchronous circular polar orbits of 600-900 Km altitude. Satellites launched by PSLV do not appear to remain permanently fixed in the same position in the sky, as viewed from a particular location on Earth.
- Statement 3 is not correct: GSLV Mk 3 is a three-stage heavy lift launch vehicle developed by ISRO. The vehicle has two solid strap-one, a core liquid booster and a cryogenic upper stage
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