Correct option is C
A
differential manometer is a device used to measure the difference in pressures between two points in a pipe or between two different pipes. It works by comparing the pressure difference using a liquid column, typically mercury or water, and provides an accurate reading of the pressure differential.
Explanation of other options:
Orifice meter: This is used to measure the flow rate of a fluid through a pipe, not the pressure difference.
Piezometer: A piezometer is used to measure static pressure in a fluid at a specific point but cannot measure the difference in pressure between two points.
Single column manometer: While this device measures pressure, it is not specifically designed for comparing the pressure between two points like a differential manometer.
Thus, the correct answer is
(c) Differential manometer.
