Question

The coefficient of velocity is defined as the ratio of the-

• A. Area of jet at vena contracta to the area of orifice
• B. Actual discharge through an orifice to the area of orifice
• C. Actual velocity of jet at vena contracta to the theoretical velocity
• D. Actual discharge through an orifice to the theoretical discharge

Answer 1

Answer:

C. Actual velocity of jet at vena contracta to the theoretical velocity

Coefficient of velocity (Cv) is the ratio of actual velocity of jet at vena-contracta to theoretical velocity. Coefficient of discharge (Cd) is the ratio of actual discharge through an orifice to theoretical discharge. Coefficient of contraction (Cc) is the ratio of area of jet at vena-contracta to area of orifice. Cd=Cv x Cc.