18 Questions
What is one of the steps involved in calibrating an orifice meter?
Adjusting the control valve in the pipeline to get the required discharge
What is the purpose of plotting the graph log Qa Vs log Hm in orifice meter calibration?
To determine the value of constant 'K'
How many times should you repeat the process while calibrating an orifice meter?
At least five times
What does the coefficient of discharge (Cd) represent in an orifice meter calibration?
The ratio of actual discharge to theoretical discharge
Which type of flow measurement device is often compared with an orifice meter?
Venturimeter
What information can be obtained from a calibration chart for an orifice meter?
Discharge corresponding to any manometric head
What is the aim of calibrating the Orifice meter?
Determine the coefficient of discharge for different flow rates
How is the theoretical discharge through an Orifice meter calculated?
$Q_{th} = a_1a_0 \sqrt{2gh}$
How does the cross-sectional area of the pipe at the inlet compare with the area of the Orifice?
The area of the pipe is greater than the area of the Orifice
Which graph is NOT drawn during the calibration of the Orifice meter?
$Cd$ Vs $Q_a$
What is used to measure the pressure head difference in an Orifice meter?
U-Tube manometer
In terms of fluid flow, what does 'Hm' represent in the formula for theoretical discharge?
Pressure head difference
What is the purpose of using an Orificemeter?
To measure the pressure difference between two sections
How is the Coefficient of Discharge (Cd) calculated for an Orificemeter?
Cd = Qa / Qth
Which principle does the Orificemeter work on?
Bernoulli's Principle
How does an Orificemeter compare to a Venturimeter?
An Orificemeter measures pressure while a Venturimeter measures velocity
What is the main function of an Orifice plate in an Orificemeter?
To create a pressure difference for measurement
How does an Orificemeter determine the discharge in a pipe?
By reducing the flow passage area to create pressure difference
Explore the calibration process of an orifice meter in this lab experiment. Measure the diameter of the pipe, orifice, and area of the collecting tank. Determine the coefficient of discharge for different flow rates.
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