Flow Measurement MCQ with answer and solution

Concept

Function and measurement of venturi meter

Formula

NONE

Step-by-step solution

1. A venturi meter is a device installed in a pipeline consisting of a converging cone, throat, and diverging cone. 2. It operates on Bernoulli's principle by creating a pressure drop across the constriction throat. 3. Measuring this differential pressure allows calculation of the volumetric flow rate or discharge through the pipe. Answer: A

Explanation

A venturi meter is a device installed in a pipeline to measure the rate of fluid flow, or discharge. It works on Bernoulli's principle by creating a pressure drop across a converging throat section. By measuring this pressure differential, the volumetric flow rate passing through the pipe can be calculated accurately.

Why the other options are wrong

B) Average velocity in open flows or pipes is measured using current meters or floats. C) Velocity at a specific point is measured using a Pitot tube. D) Static pressure at a point is measured using a piezometer or pressure gauge.

Shortcut

Venturi meter measures total Discharge (Pitot tube measures velocity at a point).

Common mistake

Confusing a Venturi meter (used for measuring flow rate/discharge) with a Pitot tube (used for point velocity measurement).