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UPSC Prelims

Science Tech Internal Security / विज्ञान एवं प्रौद्योगिकी तथा आंतरिक सुरक्षा

Theme:

Defence Technology and Internal Security

Q2 2025, Unmanned Aerial Vehicles (UAVs) (Science and Technology)

Q2. With reference to Unmanned Aerial Vehicles (UAVs), consider the following statements:

I. All types of UAVs can do vertical landing.

II. All types of UAVs can do automated hovering.

III. All types of UAVs can use battery only as a source of power supply.

How many of the statements given above are correct?

Q2. मानव-रहित वायव वाहनों (UAV) के संदर्भ में, निम्नलिखित कथनों पर विचार कीजिए:

I. सभी प्रकार के UAV ऊर्ध्वाधर अवतरण (लैंडिंग) कर सकते हैं।

II. सभी प्रकार के UAV स्वतः मंडरा सकते हैं।

III. सभी प्रकार के UAV शक्ति पूर्ति के स्रोत के रूप में केवल बैटरी का प्रयोग कर सकते हैं।

उपर्युक्त कथनों में से कितने सही है?

Explanation

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1. Correct Answer: D

2. Explanation of the statements:

     ● Statement I is incorrect.
           ○ Not all types of UAVs are capable of vertical landing.
           ○ Vertical landing is typically a feature of certain UAVs like quadcopters or VTOL (Vertical Take-Off and Landing) drones.
           ○ Fixed-wing UAVs, for example, usually require a runway or a catapult system for landing.
           ○ Therefore, the ability to perform vertical landing is not universal across all UAV types.

     ● Statement II is incorrect.
           ○ Automated hovering is a feature primarily associated with multirotor UAVs, such as quadcopters.
           ○ Fixed-wing UAVs cannot hover as they rely on forward motion to generate lift.
           ○ Thus, not all UAVs can perform automated hovering, as it depends on the design and type of the UAV.

     ● Statement III is incorrect.
           ○ UAVs can be powered by various sources, not just batteries.
           ○ Some UAVs use internal combustion engines, fuel cells, or solar power as their energy source.
           ○ The choice of power supply depends on the UAV's design, purpose, and operational requirements.
           ○ Therefore, it is incorrect to say that all UAVs use only batteries as a power source.

Science Tech Internal Security / विज्ञान एवं प्रौद्योगिकी तथा आंतरिक सुरक्षा

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Unmanned Aerial Vehicles (UAVs)

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Science Tech Internal Security / विज्ञान एवं प्रौद्योगिकी तथा आंतरिक सुरक्षा

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Explanation

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Unmanned Aerial Vehicles (UAVs)

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