hai, i am preparing for rrb section engineer writeen exam,
can enyone help me out with last few years model question
papers,my mail I.D. is email@example.com. and is there any
books to prepare for the exam.............
How will you size a pipe?. What is Darcy's formula?. From
where you will get friction factor "f" ?. In darcy formula
substitute f = 16/Re and now you see hf proportional to V
instead of V square. How do you explain?.