Efficiency of power transmission (ε) through a circular pipe is given by (ht - hf)/ht, which has a maximum value of _____________ percent?
Correct answer: C. 66.6
- A. 33:3
- B. 50
- C. 66.6
- D. 88.8
Explanation
For transmission through a pipe, friction loss increases with flow and the useful head is the total head minus this loss. Optimising the transmitted power gives a maximum efficiency of two-thirds, or about 66.6%.
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