CV stands for which term in the rotameter calculation?

• A. Corrected Volume
• B. Actual Volume
• C. Calibrated Value of Liters
• D. Concentration Value

Answer: (C)

In rotameter calculations, the reading you use is the value that has already been converted to a gas volume by the device’s calibration. This is the Calibrated Value of Liters. It represents the volume of gas, in liters, as interpreted by the rotameter based on its factory calibration and the gas conditions it was designed for. This is the figure you rely on to compute how much gas actually passed through during sampling, rather than the raw physical displacement or any subsequent correction for temperature or pressure.

Why this fits best: the rotameter’s scale isn’t just a direct measure of float position; it’s tied to a calibration that translates that position into a specific liters value. That translated figure is the CV you use in calculations. It isn’t the Actual Volume (the true physical volume under the real conditions), nor a separate Corrected Volume, nor a Concentration Value, which would relate to pollutant amount rather than the gas volume.