3.1 Ultrasonic Flow meter

1. The rate at which fluid flows through a closed pipe can be determined by

• Determining the mass flow rate

• Determining the volume flow rate

• Either (a) or (b)

• None of these

2. In _____________ velocity of fluid is constant on every point at a specific time.

• Steady flow

• Rotational flow

• Non steady flow

• None of the mentioned

3. Basically sound waves are ______________

• Voltage signals

• Pressure waves

• Current

• Radiation

4. Ultrasonic flow meters are ideal for wastewater applications or any dirty liquid which is conductive or water based

• True

• False

5. The following are the different types of ultrasonic flow meters.

• Transit time type

• Doppler type

• Open channel flow measurement

• All the above

6. The type of flow meter can also be used to measure the rate and volume of blood flow is ____________

• Ultrasonic flow meter

• Venturi meter

• Flow nozzle

• All the above

7. The main disadvantage of ultrasonic flow meter is

• High cost

• dynamic response

• Electrical form of output

• None of the above

8. Ultrasonic flow meters will generally not work with distilled water or drinking water.

• True

• False

9. Ultrasonic flow meters can be good alternatives to both electromagnetic and vortex flow meters

• Yes

• No

10. In an ultrasonic flow meter the error caused by velocity of sound propagation in medium can be eliminated by using

• measuring transit time

• measuring phase shift

• measuring difference of transit times in the direction of flow and against the direction of flow

• measuring difference of frequency in the direction of flow and against the direction of flow