A. Colebrook formula
B. Von-Karman equation
C. Fanning equation
D. None of these
Related Mcqs:
- The equation relating friction factor to Reynold number, f-0.5 = 4 loge (NRe/√f)-0.4, is called the _____________ equation?
A. Nikuradse
B. Von-Karman
C. Blasius
D. Colebrook - 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 - 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 - f = 16/NRe, is valid for__________________?
A. Turbulent flow
B. Laminar flow through an open channel
C. Steady flow
D. None of these - Stoke’s law is valid, when NRe, p is less than_________________?
A. 2
B. 100
C. 2100
D. 700 - For the free settling of a spherical particle through a fluid, the slope of, CD-log NRe, plot is____________________?
A. 1
B. -1
C. 0.5
D. -0.5 - A fluid (μ/ρ) = 0.01 cm2/sec is moving at critical flow condition (NRe = 2100) through a pipe of dia 3 cms. Velocity of flow is _______________ cm/sec?
A. 7
B. 700
C. 7000
D. 630 - Bernoulli’s equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli’s equation? A. Fluid flow is frictionless & irrotational. B. Fluid flow is steady. C. Fluid flow is uniform & turbulent. D. Fluid is compressible. E. Fluid is incompressible ?
A. A, C, D
B. B, D, E
C. A, B, E
D. A, D, E - Fluid flow through a packed bed is represented by the ______________ equation?
A. Fanning’s
B. Ergun’s
C. Hagen-Poiseuille’s
D. None of these
