Beginning Pneumatics Practice Test

Question: 1 / 400

The way to read a rotameter is to read the scale from the ________.

Bottom of the ball

Center of the ball

In a rotameter, the flow rate of a fluid is indicated by a float or ball that rises and falls within a tapered tube based on the flow of the fluid. The correct method of reading the flow rate is to take the measurement from the center of the ball. This is because the ball tends to take a stable position at a specific height depending on the flow rate, and the middle point of the ball provides the most accurate representation of its position within the tapered tube.

Reading from the center ensures uniformity and consistency, taking into account potential variations in the shape of the ball and how light or shadow might affect the readings if taken from the top or bottom. This method minimizes parallax errors and provides a reliable indication of fluid flow rate, making it the standard practice for accurate measurement with a rotameter.

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Top of the ball

None of the above

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