engineering recuitment BHEL Engineer Trainee Mock Test 2025 Fluid Mechanics Flow Through Pipes Equivalent Pipe
If l1, l2, l3 etc. be the lengths and d1, d2, d3 etc. be the diameters of the parts of a compound pipe, then length L and diameter D of a uniform equivalent pipe will be related as under
(A) \(\frac{L}{D} = \frac{{{l_1}}}{{{d_1}}} + \frac{{{l_2}}}{{{d_2}}} + \frac{{{l_3}}}{{{d_3}}} + \ldots \)
(B) \(\frac{L}{{{D^2}}} = \frac{{{l_1}}}{{d_1^2}} + \frac{{{l_2}}}{{d_2^2}} + \frac{{{l_3}}}{{d_3^2}} + \ldots \)
(C) \(\frac{L}{{{D^3}}} = \frac{{{l_1}}}{{d_1^3}} + \frac{{{l_2}}}{{d_2^3}} + \frac{{{l_3}}}{{d_3^3}} + \ldots \)
(D) \(\frac{L}{{{D^5}}} = \frac{{{l_1}}}{{d_1^5}} + \frac{{{l_2}}}{{d_2^5}} + \frac{{{l_3}}}{{d_3^5}} + \ldots \)
1
Only A
2
Only B
3
Only C
4
Only D