Question

Differential manometer has advantage over simple manometer

• A. Handling is simple
• B. It can measure smaller pressure difference
• C. Viscosity can be determined along with pressure difference
• D. It is used when pressure difference is high

Answer 1

The Correct Option is B

The differential manometer is a device used in fluid mechanics to measure the difference in pressure between two points in a flow system. Let's analyze why it has an advantage over a simple manometer for measuring specific types of pressure differences.

Concept of Differential Manometer:

A differential manometer is primarily used to measure the pressure difference between two points, which is essential in various engineering applications. It consists of a U-tube filled with a liquid (often a mercury column or another high-density fluid) and connected to two different points whose pressure difference is to be measured.

Advantages:

• Handling is simple: While differential manometers can be quite straightforward to handle, this is also true for simple manometers. Therefore, it's not a unique advantage.
• It can measure smaller pressure difference: This statement is correct. Differential manometers are designed to detect minute differences in pressure due to their sensitivity, especially when using low-density manometric fluids.
• Viscosity can be determined along with pressure difference: This is incorrect. Differential manometers are not used to measure viscosity; they are dedicated to measuring pressure differences.
• It is used when pressure difference is high: This is partially true, but the key advantage of differential manometers lies in their ability to measure small pressure differences accurately, which is not possible with simple manometers.

Conclusion:

Considering the advantages and functionality provided by a differential manometer, it becomes evident that its ability to measure smaller pressure differences is its most significant advantage over a simple manometer. This is why the correct answer is: It can measure smaller pressure difference.