Which of the following flow measurement methods is based on the principle of the Doppler effect?
A. Differential pressure flow measurement
B. Positive displacement flow measurement
C. Turbine flow measurement
D. Ultrasonic flow measurement
Answer:D
Which of the following flow measurement methods is based on the principle of the Doppler effect?
A. Differential pressure flow measurement B. Positive displacement flow measurement C. Turbine flow measurement D. Ultrasonic flow measurement
Explanation: Ultrasonic flow measurement is based on the principle of the Doppler effect. It involves measuring the frequency shift of sound waves reflected off particles in the flow stream to determine the flow rate.