The pressure head of a flow meter remains constant for_________________?
Correct answer: C. Rotameter
- A. Venturimeter
- B. Orificemeter
- C. Rotameter
- D. Pitot tube
Explanation
A rotameter operates with an approximately constant pressure drop across its float, while the float position changes to indicate flow rate. This constant pressure-head difference is a characteristic feature of variable-area meters.
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