Which type of level gauge uses the principle of acoustic waves for measuring the level of liquids?
A. Sight glass level gauge
B. Magnetic level gauge
C. Ultrasonic level gauge
D. Radar level gauge
Answer:C
Which type of level gauge uses the principle of acoustic waves for measuring the level of liquids?
A. Sight glass level gauge B. Magnetic level gauge C. Ultrasonic level gauge D. Radar level gauge
Explanation: Ultrasonic level gauges use the principle of acoustic waves to measure the level of liquids. An ultrasonic transducer sends high-frequency sound waves to the liquid, and the time taken for the waves to reflect back to the transducer is used to determine the liquid level.