UPSC CSE Prelims
Question 55
With reference to Unmanned Aerial Vehicles (UAVs), consider the following statements :
- All types of UAVs can do vertical landing.
- All types of UAVs can do automated hovering.
- All types of UAVs can use battery only as a source of power supply.
How many of the statements given above are correct?
View correct answer and explanation
Correct answer: D
Correct Option: D (None)
Explanation: UAV designs differ: fixed-wing models normally need forward motion for lift, so not all can vertically land or hover. Nor can every UAV operate on batteries alone; propulsion systems and power requirements vary.
Statement / Pair / Item-wise Analysis:
I: False-many fixed-wing UAVs cannot land vertically.
II: False-hovering requires rotorcraft or other suitable designs.
III: False-some UAVs require fuel engines, fuel cells or hybrid power and are not battery-only compatible.
Option-wise Analysis:
A. Incorrect-'Only one' overstates the verified count of 0.
B. Incorrect-'Only two' overstates the verified count of 0.
C. Incorrect-'All the three' overstates the verified count of 0.
D. Correct-this matches the facts and the item-wise assessment above.