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Question

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?

The correct answer is

None

To determine how many of the given statements about Unmanned Aerial Vehicles (UAVs) are correct, we need to evaluate each statement individually based on known facts about UAVs.

  1. Statement I: All types of UAVs can do vertical landing.
    This statement is inaccurate. While many UAVs are equipped with vertical take-off and landing (VTOL) capabilities, not all UAVs can perform vertical landings. Some UAVs are designed similar to traditional fixed-wing aircraft and require runways for landing. Therefore, this statement is incorrect.
  2. Statement II: All types of UAVs can do automated hovering.
    This statement is also incorrect. Automated hovering is a feature primarily found in multirotor and some advanced fixed-wing UAVs with specific design enhancements. Most traditional fixed-wing UAVs do not have the capability to hover automatically. Hence, this statement is incorrect.
  3. Statement III: All types of UAVs can use battery only as a source of power supply.
    This statement is incorrect as well. While many UAVs use batteries, particularly smaller ones like quadcopters, many large UAVs may use fuel or hybrid engines as their power sources. Thus, not all UAVs rely solely on batteries. This makes this statement incorrect.

In conclusion, none of the statements provided are correct. Although the initial assumption from the provided answer indicates "Only two" statements are correct, given each statement's analysis, all statements are incorrect. There seems to be a misalignment between the analysis and the labelled correct answer. Hence, based on the aforementioned facts, the correct answer should be "None."

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