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

1. All types of UAVs can do vertical landing.
2. All types of UAVs can do automated hovering.
3. All types of UAVs can use battery only as a source of power supply.

How many of the statements given above are correct?

1. Only one
2. Only two
3. All the three
4. None

Explanation

Statement I is incorrect

• Only certain types of UAVs (like multirotors or VTOL drones) can do vertical takeoff and landing (VTOL).
• Fixed-wing UAVs generally require a runway or catapult to take off and land, not vertical landing.

Statement II is incorrect

• Multirotor UAVs can hover. But fixed-wing UAVs cannot hover – they need forward motion to generate lift. So not all UAVs can hover autonomously.

Statement III is incorrect

• Some UAVs use internal combustion engines, hybrid systems, or solar power. A battery is common, but not the only power source for all UAVs.

Answer: (d) None; Difficulty Level: Easy