How many types of vari-nozzles are mentioned?

The correct answer is that there are two types of vari-nozzles mentioned. Vari-nozzles are essential components used in various applications for controlling the flow of fluids. The two types typically referred to are designed to cater to different operational requirements or performance characteristics.

Understanding the specific features or functionality of each type enhances the ability to apply them correctly in real-world scenarios. The two variants might include designs optimized for different flow rates, pressure conditions, or physical layouts. Recognizing the differences helps in selecting the appropriate nozzle type for a given application, ensuring optimal performance and efficiency.