The operation of a Rotameter is based on ________________?
Correct answer: C. Variable flow area
- A. Pressure drop across a nozzle
- B. Rotation of a turbine
- C. Variable flow area
- D. Pressure at a stagnation point
Explanation
A rotameter uses a float that rises until the flow force balances its weight, while the tapered tube provides a variable flow area. Turbine rotation and nozzle pressure drop describe other flow-measurement principles.
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