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The coefficient of discharge for an orifice meter is in the range
  • a)
    0.97 to 0.99
  • b)
    0.93 to 0.98
  • c)
    0.62 to 0.65
  • d)
    0.51 to 0.55
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
The coefficient of discharge for an orifice meter is in the rangea)0.9...
Coefficient of discharge (Cd): 
  • It is the ratio of actual discharge to theoretical discharge.
  • As in a pipe, frictional losses are present therefore Qactual will always be less than Qtheoretical.
Its value is always less than 1.

Cd = 0.62 - 0.65 for orifice meter
Cd = 0.95 - 0.98 for venturi meter
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Community Answer
The coefficient of discharge for an orifice meter is in the rangea)0.9...
Coefficient of discharge (Cd): 
  • It is the ratio of actual discharge to theoretical discharge.
  • As in a pipe, frictional losses are present therefore Qactual will always be less than Qtheoretical.
Its value is always less than 1.

Cd = 0.62 - 0.65 for orifice meter
Cd = 0.95 - 0.98 for venturi meter
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