Question

The coefficient of discharge for an actual orifice meter is:

• A. More than that of a venturi meter for the same set up
• B. Always equal to 0.61
• C. Equal to 1
• D. Less than that of a venturi meter for the same set up

Answer 1

Answer:

D. Less than that of a venturi meter for the same set up

Orifice meters have a coefficient of discharge (Cd) that is less than that of venturi meters due to the absence of converging and diverging cones. The Cd for orifice meters is typically between 0.62 to 0.65, while for venturi meters it is between 0.95 to 0.98.