Question

A device used to measure densities of fluids directly is called :

• A. Manometer
• B. Hydrometer
• C. Odometer
• D. Anemometer

Answer 1

The correct option is B

Hydrometer

Explanation for the correct option

1. Hydrometer is used to measure the density of a liquid.
2. Hydrometer is made of glass which consists of a cylindrical stem and a bulb weighted with a high-density fluid such as mercury.
3. Hydrometer works strictly in accordance with Archimedes's principle.

Explanation for the incorrect options

1. Manometer is used to measure the pressure of a fluid.
2. Odometer is used to measure the distance travelled by a body.
3. Anemometer is used to measure wind speed.

Hence, option (b) will be correct.