Q1: Manometers are used to measure

ANS:A - pressure in water channels, pipes etc.

Manometers are primarily used to measure:

• Pressure in water channels, pipes, etc.

Manometers are simple devices used to measure the pressure of a fluid at a specific point or difference in pressure between two points. They consist of a U-shaped tube partially filled with a liquid, such as water or mercury, and the pressure of the fluid causes the liquid level in one or both sides of the tube to rise or fall. While manometers are commonly used to measure pressure in water channels, pipes, and other fluid systems, they can also indirectly measure the difference in pressure at two points by comparing the heights of fluid columns in the manometer. Manometers are not typically used to measure atmospheric pressure or very low pressure. For atmospheric pressure measurement, barometers are more suitable devices, while extremely low pressures may require specialized equipment such as vacuum gauges. Therefore, the correct statement is:

• Pressure in water channels, pipes, etc.