In area meter (e.g., Rotameter), with increase in the fluid flow rate, the___________________?
Correct answer: B. Pressure drop is almost constant
- A. Pressure drop increases linearly
- B. Pressure drop is almost constant
- C. Area through which fluid flows does not vary
- D. None of these
Explanation
A rotameter operates at an approximately constant pressure drop, while the float rises to increase the annular flow area as flow rate increases. Thus, the changing area rather than a large pressure-drop change indicates the flow rate.
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