ANS:B - Venturimeter

Out of the flow measuring devices listed, the one that typically incurs the maximum installation cost as well as pressure loss is the Flow Nozzle.

Explanation:

1. Flow Nozzle:
   • Installation Cost: Flow nozzles are more complex in design compared to orificemeters and venturimeters. They require precise manufacturing and installation to ensure accurate flow measurement, which can increase installation costs.
   • Pressure Loss: Flow nozzles generally incur higher pressure losses compared to other devices like venturimeters and orificemeters. This is because they create a more significant obstruction in the flow path, resulting in higher head losses.
2. Venturimeter:
   • Installation Cost: Venturimeters are relatively simpler in design compared to flow nozzles. They are easier to install and require less precision in manufacturing, which can lead to lower installation costs.
   • Pressure Loss: Venturimeters typically have lower pressure losses compared to flow nozzles due to their smoother internal transitions and less obstruction to flow.
3. Rotameter:
   • Installation Cost: Rotameters are often used for smaller flow rates and are straightforward to install, typically involving insertion into a pipeline.
   • Pressure Loss: Rotameters have minimal pressure loss because they do not create significant obstructions in the flow path. They rely on the differential pressure across the float to measure flow rate.
4. Orificemeter:
   • Installation Cost: Orificemeters are simpler in design and installation compared to flow nozzles. They involve inserting a plate or disc into the flow stream.
   • Pressure Loss: Orificemeters can incur moderate pressure losses depending on the diameter of the orifice plate and the flow rate. However, they generally have lower pressure losses compared to flow nozzles.

Conclusion: