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| Q. |
Which among the following is formula for friction factor of circular pipes? |
| A. | 16/re |
| B. | 64/re |
| C. | re/16 |
| D. | re/64 |
| Answer» B. 64/re | |
| Explanation: circular pipes have a diameter treated in a round manner. for a fluid flow which is laminar head loss is directly proportional to the fluid velocity. thus, friction factor is inversely proportional to its velocity. therefore, the correct option is ‘64/re’. | |
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