Read the following statements marked as Assertion (A) and Reason (R). Choose the correct option: Assertion (A): Spark Torch Igniters are being increasingly incorporated into advanced rocket engine designs for next-generation launch vehicles. Reason (R): They provide superior multi-restart capability and consistent, reliable ignition in extreme conditions, allowing for more complex mission profiles and enabling engine reusability.
Both A and R are true, and R is the correct explanation of A
Assertion (A) is true. Spark torch igniters are being adopted in modern liquid and cryogenic rocket engines for next-generation launch vehicles (ISRO, for example, has qualified such an igniter for engines with multiple-restart needs).
Reason (R) is also true. A spark torch igniter uses an electric spark to light a small torch of propellant, which then ignites the main chamber. Unlike one-shot pyrotechnic igniters, it can be fired again and again, giving reliable ignition in vacuum and at very low temperatures.
This repeatable, dependable ignition is precisely what enables multiple engine restarts, complex mission profiles (placing satellites in different orbits) and reusable engines, so R explains why A is happening.
Hence, both A and R are true, and R is the correct explanation of A.
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Important Questions from Space and Nuclear Program
With reference to `Astrosat', the astronomical observatory launched by India, which of the following statements is/are correct?
1. Other than USA and Russia, India is the only country to have launched a similar observatory into space.
2. Astrosat is a 2000 kg satellite placed in an orbit at 1650 km above the surface of the Earth.
Select the correct answer using the code given below.
Consider the following statements: The Mangalyaan launched by ISRO
1. is also called the Mars Orbiter Mission
2. made India the second country to have a spacecraft orbit the Mars after USA
3. made India the only country to be successful in making its spacecraft orbit the Mars in its very first attempt
Which of the statements given above is/are correct?
Which of the following pair is/are correctly matched?
Select the correct answer using the code given below.
Satellites used for telecommunication relay are kept in a geostationary orbit. A satellite is said to be in such an orbit when:
1) The orbit is geosynchronous.
2) The orbit is circular.
3) The orbit lies in the plane of the Earth's equator.
4) The orbit is at an altitude of 22,236 km
Select the correct answer using the codes given below:
An artificial satellite orbiting around the Earth does not fall down. This is so because the attraction of Earth
