Question

Which of the following statement(s) regarding a venturimeter is/are correct?

• A. In the direction of flow, it consists of a converging section, a throat, and a diverging section.
• B. In the direction of flow, it consists of a diverging section, a throat, and a converging section.
• C. It is used for flow measurement at a very low Reynolds number.
• D. Pressure tappings are provided just upstream of the venturimeter and at the throat.

Hint:

A venturimeter operates on the principle of the Bernoulli equation, where the pressure difference is related to the velocity difference.

Answer 1

The Correct Option is A, D

A venturimeter is a device used to measure the flow rate of a fluid. It consists of a converging section, a throat (narrowest point), and a diverging section. The fluid accelerates as it enters the converging section and decelerates in the diverging section, and this change in velocity leads to a pressure difference, which is measured.
Step 1: Analyzing the options.
- (A) is correct: A venturimeter has a converging section, a throat, and a diverging section. This is the standard configuration.
- (B) is incorrect: The flow direction in a venturimeter starts with a converging section, not a diverging section.
- (C) is incorrect: Venturimeters are typically used for flows with moderate Reynolds numbers, not very low Reynolds numbers.
- (D) is correct: Pressure tappings are provided just upstream of the venturimeter and at the throat to measure the pressure difference between the sections.
Step 2: Conclusion.
Thus, the correct answers are (A) and (D).