Question

Anemometre is used to measure the __________.

• A. wind speed
• B. wind direction
• C. wind pressure
• D. wind mass

Answer 1

Answer: (A), (B)

The correct options are
A wind speed
B wind direction

Anemometre is a device which is used for measuring wind speed and finding wind direction. Common anemometres consists of a shaft which rotates when wind blows.
It finds wind speed by measuring the number of rotations per second of the shaft. The stronger the wind, the more is the number of rotations per second of the shaft.
It is also used to find the direction of the wind with the help of a wind vane. It has a needle which points in the direction of wind.