False: Orificemeter readings are not more accurate than Venturimeter readings.

Explanation:

Orificemeter and Venturimeter are both devices used for measuring the flow rate of fluids in pipelines. While they operate on different principles, both devices are commonly used in the industry. However, when it comes to accuracy, neither device can be considered more accurate than the other.

Here are some points to consider:

- Both devices rely on the same basic principle: measuring the pressure drop across a constriction in the pipe to determine the flow rate of fluid.
- The accuracy of both devices depends on several factors, such as the shape and size of the constriction, the fluid properties, and the installation conditions.
- Orificemeter readings can be affected by the condition of the orifice plate, which can become clogged or worn over time. Venturimeter readings can be affected by erosion or corrosion of the throat section.
- The accuracy of both devices can be improved by careful installation, calibration, and maintenance.
- In some situations, one device may be more suitable than the other due to factors such as cost, size, or the nature of the fluid being measured. For example, Venturimeters may be more suitable for measuring high flows of clean fluids, while Orificemeters may be more suitable for measuring low flows or fluids with high solid content.

In summary, both Orificemeter and Venturimeter can be accurate devices for measuring fluid flow, but neither device can be said to be more accurate than the other. The accuracy of each device depends on various factors, and the choice of device will depend on the specific application.