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For efficient working of a control meter, its throat length is approximately kept
- a)equal to the critical depth
- b)twice the critical depth
- c)three times the critical depth
- d)four times the critical depth.
Correct answer is option 'C'. Can you explain this answer?
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For efficient working of a control meter, its throat length is approxi...
Control Meter and Throat Length
A control meter is a device used in open-channel flow measurement to determine the flow rate of water in a stream or canal. The throat length of a control meter is an important parameter that affects its efficiency in measuring flow rate.
Critical Depth
Critical depth is the depth of flow in an open channel at which the specific energy of the fluid is at a minimum. It is a critical value because any decrease or increase in flow depth will result in an increase in specific energy.
Relation between Throat Length and Critical Depth
The throat length of a control meter is approximately kept three times the critical depth to ensure efficient working. This is because at this ratio, the flow through the meter is nearly uniform and the head loss is minimized.
Benefits of Keeping Throat Length Three Times Critical Depth
Keeping the throat length of a control meter three times the critical depth has several benefits:
1. Uniform Flow: The flow through the control meter is nearly uniform, which ensures accurate measurement of flow rate.
2. Reduced Head Loss: The head loss through the control meter is minimized, which reduces the energy required to maintain flow.
3. Efficient Working: The control meter operates efficiently, providing reliable and consistent measurements of flow rate.
Conclusion
The throat length of a control meter is an important parameter that affects its efficiency in measuring flow rate. Keeping the throat length approximately three times the critical depth ensures efficient working of the meter by providing uniform flow, reducing head loss, and ensuring accurate measurement of flow rate.
A control meter is a device used in open-channel flow measurement to determine the flow rate of water in a stream or canal. The throat length of a control meter is an important parameter that affects its efficiency in measuring flow rate.
Critical Depth
Critical depth is the depth of flow in an open channel at which the specific energy of the fluid is at a minimum. It is a critical value because any decrease or increase in flow depth will result in an increase in specific energy.
Relation between Throat Length and Critical Depth
The throat length of a control meter is approximately kept three times the critical depth to ensure efficient working. This is because at this ratio, the flow through the meter is nearly uniform and the head loss is minimized.
Benefits of Keeping Throat Length Three Times Critical Depth
Keeping the throat length of a control meter three times the critical depth has several benefits:
1. Uniform Flow: The flow through the control meter is nearly uniform, which ensures accurate measurement of flow rate.
2. Reduced Head Loss: The head loss through the control meter is minimized, which reduces the energy required to maintain flow.
3. Efficient Working: The control meter operates efficiently, providing reliable and consistent measurements of flow rate.
Conclusion
The throat length of a control meter is an important parameter that affects its efficiency in measuring flow rate. Keeping the throat length approximately three times the critical depth ensures efficient working of the meter by providing uniform flow, reducing head loss, and ensuring accurate measurement of flow rate.
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For efficient working of a control meter, its throat length is approxi...
Throat length is min. dist. b/w the toe and upper size of weld
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For efficient working of a control meter, its throat length is approximately kepta)equal to the critical depthb)twice the critical depthc)three times the critical depthd)four times the critical depth.Correct answer is option 'C'. Can you explain this answer?
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