| Question | Hygrometer is used for the measuring of ? |
| 1. | Speed of sound |
| 2. | Density of milk |
| 3. | Humidity of the air |
| 4. | Specific gravity of the liquid |
| The correct answer is (3) |
| Question | Hygrometer is used for the measuring of ? |
| 1. | Speed of sound |
| 2. | Density of milk |
| 3. | Humidity of the air |
| 4. | Specific gravity of the liquid |
| The correct answer is (3) |