Question

Which of the following is the expression of the Carmen equation where symbols have their usual meanings?

(a) hf  = f* (L/(s *d)) * ((1-e)/e^3) * (v^2/g)

(b) hf  = f* (L/(s *d)) * ((1-e)/e^3) * (v/g)

(c) hf  = f* (L/(s *d)) * ((1-e)/e) * (v^2/g)

(d) hf  = f* (L/(s *d)) * ((1-e)/e^2) * (v^2/g)

The question was asked in a national level competition.

Question is taken from Filtration Hydraulics in division Filtration of Environmental Engineering

Answer 1

Right answer is (a) hf  = f* (L/(s *d)) * ((1-e)/e^3) * (v^2/g)

The best I can explain: The expression of the Carmen equation is given by  hf  = f* (L/(s *d)) * ((1-e) /e^3) * (v^2/g) where  hf =head loss, d= diameter of pipe. L= length of pipe and v=approach velocity.