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				| 1. | In a circular tube of diameter 100 mm and length 13 m with laminar flow, the friction factor is estimated to be 0.05. Calculate the Reynolds number? | 
| A. | 950 | 
| B. | 2300 | 
| C. | 1280 | 
| D. | None of the above | 
| Answer» D. None of the above | |