1. Why is discharge coefficient always less than 1. 2. What is the difference between discharge coefficient of Orifice Plate Meter and Venturi Meter if both have the same internal diameter and...

1. Why is discharge coefficient always less than 1.

2. What is the difference between discharge coefficient of Orifice Plate Meter and Venturi Meter if both have the same internal diameter and experience the same flow rate. Which one has a higher loss of energy?

3. What would you expect on the effect of changing the diameter (Larger and smaller) of the orifice on the discharge coefficient?