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Question
What is the value of coefficient of discharge when the area of jet of liquid at outlet is equal to the area of mouthpiece?
A.
0.855
B.
0.530
C.
0.602
D.
0.608
Answer ( Option A)

0.855

Solution

As given in question the area of jet of liquid at outlet is equal to the area of mouthpiece, means the value of CC (coefficient of contraction) is 1 and for mouthpiece the value of Cv (coefficient of velocity) is 0.855
As we know that,
CD(coefficient of discharge) = CC (coefficient of contraction) × Cv (coefficient of velocity)
Hence, CD = CC × Cv
CD = 1 × 0.855
CD = 0.855

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