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Q: Which of the following speed of flow measuring instrument is area meter?
  • A. Venturimeter
  • B. Rotameter
  • C. Pitot tube
  • D. None of these
Correct Answer: Option B - Rotameter measuring instrument is an area meter. A rotameter is a device that measure the volumetric flow rate of liquids in a closed pipe or tube. It belongs to a class of meters called variable- area flow meters, which measure flow rate by allowing the cross sectional area the liquid travells through the pipe or tube.
B. Rotameter measuring instrument is an area meter. A rotameter is a device that measure the volumetric flow rate of liquids in a closed pipe or tube. It belongs to a class of meters called variable- area flow meters, which measure flow rate by allowing the cross sectional area the liquid travells through the pipe or tube.

Explanations:

Rotameter measuring instrument is an area meter. A rotameter is a device that measure the volumetric flow rate of liquids in a closed pipe or tube. It belongs to a class of meters called variable- area flow meters, which measure flow rate by allowing the cross sectional area the liquid travells through the pipe or tube.