The satellite 'INSAT-4DS' does not appear in ISRO's official records or launch history. As per critical grounding rules, questions cannot be generated for unverified or non-existent events/satellites. Therefore, the question, options, and explanation require review.
143.
NEEDS_REVIEW
A NEEDS_REVIEW
B NEEDS_REVIEW
C NEEDS_REVIEW
D NEEDS_REVIEW
Answer: A
The satellite 'INSAT-4DS' does not appear in ISRO's official records or launch history. As per critical grounding rules, questions cannot be generated for unverified or non-existent events/satellites. Therefore, the question, options, and explanation require review.
144.
NEEDS_REVIEW
A NEEDS_REVIEW
B NEEDS_REVIEW
C NEEDS_REVIEW
D NEEDS_REVIEW
Answer: A
The satellite 'INSAT-4DS' does not appear in ISRO's official records or launch history. As per critical grounding rules, questions cannot be generated for unverified or non-existent events/satellites. Therefore, the question, options, and explanation require review.
145.
Establishing a robust deep-space communication network is vital for complex space missions. Which of the following is a key challenge that such a network helps to overcome?
A The increasing cost of launching satellites into low Earth orbit.
B The signal degradation and time delays encountered over vast interplanetary distances.
C The limited availability of solar power for spacecraft.
D The difficulty in developing miniaturized scientific instruments.
Answer: B
Deep-space communication faces significant challenges due to the immense distances involved. Signals weaken considerably, and there are substantial time delays between sending a command and receiving a response. A coordinated network with advanced ground stations helps mitigate these issues.
146.
The collaboration between India and ESA for a deep-space communication network aims to bolster capabilities for future space missions. What is a primary benefit of such a joint network?
A To exclusively monitor Earth's weather patterns.
B To share resources and expertise for enhanced deep-space exploration and communication.
C To develop new satellite-based navigation systems for terrestrial use.
D To create a global network for commercial satellite imagery.
Answer: B
The collaboration leverages the strengths of both India and ESA, allowing for the sharing of infrastructure, technical expertise, and operational capabilities. This joint effort enhances the ability to communicate with and control spacecraft on missions to the Moon, Mars, and beyond.
147.
India and the European Space Agency (ESA) have announced a collaboration to establish a deep-space communication network. Which Indian facility is expected to play a crucial role in this network?
A Indian Institute of Astrophysics (IIA), Bengaluru
B Indian Deep Space Network (IDSN), Kavalur
C Aryabhata Research Institute of Observational Sciences (ARIES), Nainital
D National Centre for Space Studies (NCSS), Sriharikota
Answer: B
The Indian Deep Space Network (IDSN) located at Kavalur, Tamil Nadu, is set to be a key component of the collaborative deep-space communication network between India and ESA. It will enhance India's capabilities in communicating with spacecraft in distant regions of space.
148.
The NGLV (Next Generation Launch Vehicle) is envisioned by ISRO to be a versatile launch platform. Which of the following is a primary objective for developing the NGLV with advanced propulsion systems like the semi-cryogenic engine?
A To exclusively cater to small satellite launches.
B To reduce the cost of access to space and enhance launch capabilities.
C To replace all existing ISRO launch vehicles immediately.
D To focus solely on human spaceflight missions.
Answer: B
The development of NGLV with advanced propulsion like semi-cryogenic engines aims to significantly reduce the cost of launching payloads into orbit and increase ISRO's overall launch capabilities, making space access more economical and efficient for various missions.
149.
The successful test of the semi-cryogenic engine is a significant step towards the development of ISRO's Next Generation Launch Vehicle (NGLV). What is a key advantage of using a semi-cryogenic engine compared to traditional cryogenic engines for certain launch vehicle stages?
A Higher specific impulse, leading to greater payload capacity.
B Lower cost of propellants and simpler engine design.
C Ability to operate at higher temperatures.
D Reduced environmental impact due to cleaner combustion.
Answer: B
Semi-cryogenic engines, typically using RP-1 and LOX, offer a more cost-effective solution and a simpler engine design compared to fully cryogenic engines (which use LH2/LOX). While cryogenic engines offer higher performance, semi-cryogenic engines provide a practical balance for certain applications.
150.
ISRO recently conducted a successful test of a semi-cryogenic engine. What is the primary fuel combination being tested for this engine, intended for the NGLV (Next Generation Launch Vehicle)?
A Liquid Hydrogen and Liquid Oxygen (LH2/LOX)
B Kerosene (RP-1) and Liquid Oxygen (LOX)
C Methane and Liquid Oxygen (LOX)
D Hypergolic Propellants
Answer: B
The semi-cryogenic engine tested by ISRO for the NGLV utilizes Kerosene (RP-1) as the fuel and Liquid Oxygen (LOX) as the oxidizer. This combination offers a good balance of performance and cost-effectiveness for heavy-lift launch vehicles.
