engineering recuitment GATE IN Test Series 2023-24 Mock Test Sensors and Industrial Instrumentation Measurement of Flow Ultrasonic
Figure given below shown as ultrasound flow meter with the transducers separated by a distance L = 25 mm with the line joining the transducers making an angle 60° with the direction of the flow. The transit time difference between upstream and downstream measurement is 10 ns with the sound velocity in the medium being 1000 m/s. Assuming that the size of the transducers is very small as compared to the diameter of the pipe, the velocity is
1
0.2 m/s
2
2 m/s
3
0.4 m/s
4
40 m/s