A. Nikuradse
B. Von-Karman
C. Blasius
D. Colebrook
Related Mcqs:
- 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 - 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 - The equation f-0.5 = 4.07 loge (NRe √f)-0.6 is called the ____________?
A. Colebrook formula
B. Von-Karman equation
C. Fanning equation
D. None of these - 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 - 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 - Fanning friction factor is equal to (where, fB = Blasius friction factor) ?
A. fB/4
B. fB/2
C. 4fB
D. 2fB - 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 - 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. - 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 - Which of the fluid forces are not considered in the Reynold’s equation of flow ?
A. Viscous forces
B. Turbulent forces
C. Pressure forces
D. Compressibility forces
