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| Q. |
Which of the following is true? |
| A. | hgl will never be above egl |
| B. | hgl will never be under egl |
| C. | hgl will never coincide with egl |
| D. | hgl will may or may not be above egl |
| Answer» A. hgl will never be above egl | |
| Explanation: egl is obtained by plotting total head and hgl is obtained by plotting piezometric head at various points along the axis of the pipe. | |
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