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The coefficient of discharge Cd is equal to - (where Cc = Coefficient of contraction, Cv = Coefficient of velocity)

The coefficient of discharge Cd is equal to - (where Cc = Coefficient of contraction, Cv = Coefficient of velocity) Correct Answer C<sub>c</sub> × C<sub>v</sub>

Concept:

Coefficient of Discharge (Cd): It is the ratio of the actual discharge to the theoretical discharge i.e.,

Qac = Cd × Qth 

Also, Cd = Cv × Cc 

Coefficient of velocity (Cv): It is the ratio of the actual velocity to the theoretical velocity i.e.,

​Vac = Cv × Vth

Coefficient of contraction (Cc): It is defined as the ratio of the area of the jet at vena contracta (ac) to the area of the orifice (a).

​Important Points

As head loss increases, the value of Cd decreases. 

Flow Meter Head Loss Cd
Venturimeter Low 0.98
Orifice meter High 0.60

Related Questions

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