Fanning friction factor is equal to (where, fB = Blasius friction factor) ?

Related Mcqs:

1. If Blasius or Darcy friction factor is ‘f1’ then the Fanning friction factor is equal to____________________?

   A. f1/4 B. 4f2 C. 2f1 D. f1/2...

2. Which of the following is the „Blasius equation‟, relating friction factor to the Reynolds number ?

   A. f = 0.079.NRe-0.25 B. f-0.5 = 4.07 loge (NRef)-0.6 C. Both ‘a’ and ‘b’ D. None of these...

3. A centrifugal pump is used to pump water through a horizontal distance of 150 m, and then raised to an overhead tank 10 m above. The pipe is smooth with an I.D of 50 mm. What head (m of water) must the pump generate at its exit E. to deliver water at a flow rate of 0.001 m3/s? The Fanning friction factor, f is 0.0062 ?

   A. 10 m B. 11 m C. 11.8 m D. 30 m...

4. Fanning friction factor equation applies to the _____________ fluid flow?

   A. Non-isothermal condition of B. Compressible C. Both A. and B. D. Neither A. nor B....

5. What is the value of Fanning friction factor f ‘ for smooth pipe at NRe = 106 approximately ?

   A. 0.003 B. 0.01 C. 0.1 D. 0.3...

6. Fanning friction factor for laminar flow of fluid in a circular pipe is____________________?

   A. Not a function of the roughness of pipe wall B. Inversely proportional to Reynolds number C. Both A. & B. D. Neither A. nor B....

7. Friction factor for a hydraulically smooth pipe at NRe = 2100 is f1. If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of NRe, will_______________?

   A. Increase B. Decrease C. Remain unchanged D. Increase or decrease depending on the pipe material...

8. If three pipes of different diameters, lengths & friction factors are connected in parallel, then (where, Q = flow rate, V= fluid velocity f = friction factor). ?

   A. Q = Q1 + Q2 + Q3 B. V1 = V2 = V3 C. Q1 = Q2 = Q3 D. f = f1 + f2 + f3...

9. Colebrook equation for friction factor in turbulent flow is given by, f-0.5 = -4 loge [(ε/D) + (1.26/NRe √F). It reduces to Nikuradse equation for a value of (ϵ/D) equal to __________________?

   A. 0 B. 1 C. ∞ D. 0.5...

10. Friction produced by the formation of wakes is called the ______________ friction?

    A. Disk B. Skin C. Form D. None of these...