41.
Consider the following statements about the Bailey Bridge:
- Bailey bridges use light steel panels linked through pins to create guardrails.
- The beams that form the deck of the bridge are placed directly on the ground.
- The parts of a Bailey bridge are designed to lock together for enhanced stability and can be extended.
How many of the above statements are correct?
[A] Only one
[B] Only two
[C] All three
[D] None
Show Answer
Correct Answer: B [Only two]
Notes:
- Bailey bridges use light steel panels linked through pins to create guardrails. Correct: Bailey bridges are constructed using prefabricated steel panels, which are connected by pins. These panels act as side railings or guardrails, providing structural integrity and safety.
- The beams that form the deck of the bridge are placed directly on the ground. Incorrect because the beams form the deck of the bridge on top of the guardrails, not directly on the ground.
- The parts of a Bailey bridge are designed to lock together for enhanced stability and can be extended. Correct: The modular design allows sections to be locked together, increasing the bridge’s strength and stability. Additionally, Bailey bridges can be extended by adding more sections as needed.
42. With respect to quantum computing, which of the following statements is/are correct?
- Quantum computers utilize quantum bits, or “qubits,” that can exist in multiple states simultaneously.
- The Ocelot chip can reduce the costs of implementing quantum error correction by up to 90%.
- Quantum computers are less prone to interference.
Select the correct option from the codes given below:
[A] 1 and 2 only
[B] 2 and 3 only
[C] 3 only
[D] 1, 2 and 3
Show Answer
Correct Answer: A [1 and 2 only]
Notes:
- Quantum computers utilize quantum bits, or “qubits,” that can exist in multiple states simultaneously. Correct: Quantum computers use qubits, which can represent and store information in multiple states at once, enabling them to perform complex calculations much faster than classical computers.
- The Ocelot chip can reduce the costs of implementing quantum error correction by up to 90%. Correct: The Ocelot chip is designed to lower the costs associated with quantum error correction, making quantum computing more feasible for practical applications.
- Quantum computers are less prone to interference. Incorrect: quantum computers are highly prone to interference that leads to errors in quantum algorithms running on it. Thus it can give erroneous results. Scientists are working to improve accuracy e.g., Google has announced plans to have fault-tolerant quantum-computing hardware by 2030.
43. Regarding renewable energy technologies, consider the following statements:
- Floating solar power plants can reduce water evaporation from reservoirs.
- Concentrated solar power (CSP) uses mirrors to focus sunlight onto a small area.
- Geothermal energy harnesses heat from the Earth’s core for electricity generation.
- Offshore wind farms are typically placed in shallow water to minimize costs.
How many of the above statements are correct?
[A] Only one
[B] Only two
[C] Only three
[D] All four
Show Answer
Correct Answer: D [All four]
Notes:
- Floating solar power plants can reduce water evaporation from reservoirs: This is correct. They create a shade effect, reducing evaporation and preserving water resources.
- Concentrated solar power (CSP) uses mirrors to focus sunlight onto a small area: This is correct. CSP systems can achieve higher temperatures than photovoltaic systems, increasing efficiency.
- Geothermal energy harnesses heat from the Earth’s core for electricity generation: This is correct. Geothermal plants convert steam or hot water from the Earth into electricity.
- Offshore wind farms are typically placed in shallow water to minimize costs: This is correct. Shallow waters reduce installation and maintenance costs compared to deep-water sites.
44. With reference to the Astra-III missile, consider the following statements:
- It is named after a legendary weapon from the Ramayana.
- Its range is 340 km for targets at 20 km altitude and 190 km for those at 8 km altitude.
- Powered by a dual-fuel ducted ramjet, it can launch from an IAF jet at sea level or 20 km altitude.
How many of the above statements are correct?
[A] Only one
[B] Only two
[C] All three
[D] None
Show Answer
Correct Answer: B [Only two]
Notes:
- It is named after a legendary weapon from the Ramayana. Incorrect: The missile is named Gandiva, after Arjuna’s bow from the Mahabharata.
- Its range is 340 km for targets at 20 km altitude and 190 km for those at 8 km altitude. Correct: It has a range of 340 kilometers when the target is at an altitude of 20 kilometers, and 190 kilometers when the target is at a lower altitude of 8 kilometers.
- Powered by a dual-fuel ducted ramjet, it can launch from an IAF jet at sea level or 20 km altitude. Correct: It is powered by a dual-fuel ducted ramjet engine, enabling it to be launched from an IAF jet at sea level or as high as 20 kilometers in altitude.
45. Consider the following:
- Himgiri
- Androth
- INS Arnala
Which of the above is/are classified as an Anti-Submarine Warfare vessel?
[A] Only 1
[B] Only 2
[C] 1 and 3
[D] 2 and 3
Show Answer
Correct Answer: D [2 and 3]
Notes:
- Himgiri is an Advanced Frigate designed for multi-role operations, including surface warfare and air defense.
- Androth is specifically designed as an Anti-Submarine Warfare Shallow watercraft, focusing on detecting and neutralizing submarines.
- INS Arnala, the first of eight Anti-Submarine Warfare Shallow Water Crafts (ASW SWC) for the Indian Navy, was launched on December 20, 2022. It is designed for coastal anti-submarine operations and Low Intensity Maritime Operations (LIMO).
46.
Which of the following pairs of hydrogen types and their production processes is/are correctly matched?
| Hydrogen Type |
Production Process |
| 1. Green Hydrogen |
Electrolysis of water using renewable energy |
| 2. Blue Hydrogen |
Methane pyrolysis with carbon capture |
| 3. Grey Hydrogen |
Steam methane reforming without carbon capture |
| 4. Turquoise Hydrogen |
Methane pyrolysis producing solid carbon |
Select the correct answer
[A] 1 and 3 only
[B] 1, 3, and 4 only
[C] 1, 2, and 4 only
[D] 1, 2, 3 and 4
Show Answer
Correct Answer: B [1, 3, and 4 only]
Notes:
- Green hydrogen is correctly matched as it is produced through the electrolysis of water using renewable energy sources like solar or wind, making it a clean energy option.
- Grey hydrogen is also correctly matched because it is generated via steam methane reforming (SMR) without carbon capture, leading to significant CO₂ emissions.
- Turquoise hydrogen is correctly paired since it is produced through methane pyrolysis, resulting in hydrogen and solid carbon instead of CO₂, making it a lower-emission process.
- Blue hydrogen is incorrectly matched because it is produced using steam methane reforming (SMR) with carbon capture, not methane pyrolysis.
- The key difference is that blue hydrogen relies on capturing and storing CO₂ to reduce emissions, while methane pyrolysis is the defining process for turquoise hydrogen.
47. Consider the following statements:
- Statement-I: The Digital Crop Survey (DCS) System collects real-time crop data directly from farmers’ fields using a mobile interface.
- Statement-II: Agri Stack, associated with DCS, is designed to ensure farmers’ data privacy and security through encryption and consent-based sharing.
Which one of the following is correct in respect of the above statements?
[A] Both Statement-I and Statement-II are correct and Statement-II explains Statement-I
[B] Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I
[C] Statement-I is correct, but Statement-II is incorrect
[D] Statement-I is incorrect, but Statement-II is correct
Show Answer
Correct Answer: B [Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I]
Notes:Statement-I:
- This statement is correct. The DCS System has been established to collect crop-sown details via a mobile interface, ensuring data is captured directly from the field. This approach provides accurate, real-time information on crop areas for every agricultural plot, aiding in precise production estimations.
Statement-II:
- This statement is correct. Agri Stack has been developed in accordance with the Digital Personal Data Protection Act, 2023, and other IT laws of India. It ensures complete privacy of farmers’ data by collecting information only with their consent. Farmers have full control over their data, which is shared with authorized entities solely for specific purposes based on their consent
48. Consider the following assertions and reasons:
- BatEchoMon is expected to revolutionize bat research and ecological monitoring in India.
- It is the first international system that combines ultrasonic recording and real-time classification into a single modular device.
Which of the following is correct?
[A] Both 1 and 2 are true, and 2 is the correct explanation of 1
[B] Both 1 and 2 are true, but 2 is not the correct explanation of 1
[C] 1 is true, but 2 is false
[D] 1 is false, but 2 is true
Show Answer
Correct Answer: B [Both 1 and 2 are true, but 2 is not the correct explanation of 1]
Notes:
The first statement is true as BatEchoMon can possibly transform bat research and ecological monitoring in India by automating the detection and species analysis. The second statement is also true but it does not necessarily explain the first. While the device is unique globally in combining ultrasonic recording and real-time classification into a modular device, its impact on revolutionizing bat research isn’t due to this reason alone. Rather, it is due to the capabilities it offers that automation of detection and species analysis becomes possible.
49. With reference to the European Space Agency’s (ESA) Biomass Mission, consider the following statements:
- The mission will be the first to globally map forest biomass using a P-band synthetic aperture radar (SAR).
- It aims to measure the carbon stored in forest vegetation and soil from space.
- The satellite will be launched into a geostationary orbit to allow continuous monitoring of the same area.
Which of the above statements is/are correct?
[A] Only 1 and 2
[B] Only 2 and 3
[C] Only 1 and 3
[D] 1, 2 and 3
Show Answer
Correct Answer: A [Only 1 and 2]
Notes:
Statement 1 is correct. The Biomass mission will be the first in space to use long-wave P-band synthetic aperture radar (SAR) to map forest biomass. Statement 2 is also correct as it aims to measure how much carbon is stored in forests (both in soil and vegetation), which is crucial for understanding the carbon cycle. Statement 3 is incorrect because the satellite will be launched into a sun-synchronous orbit, not a geostationary orbit, to ensure consistent lighting conditions for Earth observation.
50. Which of the following statements correctly describe QpiAI-Indus?
- It is a superconducting quantum computer with 25 qubits and offers a full-stack solution.
- It has already achieved large-scale quantum supremacy over classical HPC in benchmarks.
- It is part of India’s National Quantum Mission.
Select the correct answer using the codes given below:
[A] Only 1 and 3
[B] Only 2 and 3
[C] Only 1
[D] 1, 2 and 3
Show Answer
Correct Answer: A [Only 1 and 3]
Notes:
QpiAI-Indus is a superconducting quantum computer offering a full-stack 25-qubit architecture and is a component of India’s National Quantum Mission. However, as of now, there is no official confirmation or evidence of it achieving large-scale quantum supremacy over classical high performance computing (HPC) in recognized benchmarks.
