Which flow measurement technique is based on the principle of measuring the pressure drop across a flow obstruction?
A. Positive displacement flow meter
B. Vortex flow meter
C. Turbine flow meter
D. Differential pressure flow meter
Answer:D
Which flow measurement technique is based on the principle of measuring the pressure drop across a flow obstruction?
A. Positive displacement flow meter B. Vortex flow meter C. Turbine flow meter D. Differential pressure flow meter
Explanation: Differential pressure flow meters work by measuring the pressure drop across a flow obstruction in a pipe, such as an orifice plate, venturi tube, or flow nozzle. By measuring the pressure difference between two points in the pipe, the flow rate can be calculated.