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📝 These questions of are very important for various competitive exams such as SSC, UPSC, Bank, Railway, etc. Follow us to get daily updates, that will help you to score good marks in exams. Devices And Their Uses |ℹ️Important General Knowledge Questions | gkdaily55.blogspot.com ► Sonar :- It is used to detect objects hidden inside the sea. ► Anemometer :- It is used to measure the speed of wind. ► Pyrometer :- Used for measurement of high temperature. ► Barometer : It is used to measure atmospheric pressure. ► Hydrometer :- It is used to measure the density of water. ► Hygrometer :- It is used to measure the humidity of the air. ► Lactometer - It is used to measure the density of milk ► Stethoscope : This is used to listen to the heartbeat. ► Sphygnomanometer : It measures blood pressure (BP) ► Keratometer : It is used to determine the purity of gold. ► Luxmeter : Used to measure the intensity of light ► Radar - Finding the position of objects by radio waves ► Seismograph –