Correct answer
D. all of these
Explanation
The correct answer is all of these.
For laminar flow in circular pipes, the Darcy’s friction factor f is equal to________?
If Biochemical oxygen demand (BOD. of a town is 20000 kg/day and BOD per capita per day is 0.05 kg, then population equivalent of town is________?
Battening is preferable when the________?
What is an accounting term that represents an inventory account adjustment?
Fish plate is in contact with rail at________?
Which of the following stone is best suited for construction of piers and abutments of a railway bridge?