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

A. Long pipe at constant rate
B. Long pipe at decreasing rate
C. Expanding tube at increasing rate
D. Expanding tube at constant rate

A. 40
B. 34
C. 8
D. 37

A. N
B. N/m
C. N/m2
D. N/m3

A. Applicable to laminar flow problems
B. A universal constant
C. Zero at the pipe wall
D. None of these

A. Perfect gases only
B. Isothermal flow of gases
C. Adiabatic unsteady flow of gases
D. All compressible fluids

A. HB/2 (H + B)
B. HB/(H + B)
C. 2HB/(H + B)
D. 4HB/(H + B)