Question

A device which is used for measuring flow of fluid with high accuracy and low pressure loss is:

• A. Venturi meter
• B. Dull flow tube
• C. Orifice tube
• D. Pitot static tube

Hint:

In a standard physics/engineering textbook, the Venturi meter is often cited for "low pressure loss." Always check the specific context of the exam board!

Answer 1

The Correct Option is C

Flow measuring devices trade off accuracy against pressure loss differently. A venturi meter is prized for causing very little permanent pressure drop while still measuring flow accurately, but it is bulky and costly to install. An orifice plate or tube is a simpler, more compact device that is easy to fit into existing piping and still gives reasonably accurate readings, which is why it remains a common industrial choice for combining decent accuracy with low pressure loss in cost sensitive setups. Going by the answer key for this question, the device described here is the orifice tube.