Which of the following flow meters is based on the principle of measuring the change in frequency of sound waves?
A. Turbine meter
B. Magnetic flow meter
C. Coriolis flow meter
D. Ultrasonic flow meter
Answer:D
Which of the following flow meters is based on the principle of measuring the change in frequency of sound waves?
A. Turbine meter B. Magnetic flow meter C. Coriolis flow meter D. Ultrasonic flow meter
Explanation: Ultrasonic flow meters use sound waves to determine the velocity of fluid flow. The change in frequency of the sound waves is used to determine the flow rate.