Which of the following two quantities when same, makes one pipe system equivalent to another pipe system ?

Related Mcqs:

1. Buckingham-π theorem states that in any physical problem including ‘n’ quantities having ‘m’ dimensions, the quantities can be arranged into _____________ independent dimensionless parameters?

   A. m
   B. n
   C. n-m
   D. n/m

2. The pressure drop per unit length of pipe incurred by a fluid ‘X’ flowing through pipe is Δp. If another fluid ‘Y’ having both the specific gravity & density just double of that of fluid ‘X’, flows through the same pipe at the same flow rate/average velocity, then the pressure drop in this case will be__________________?

   A. Δp
   B. 2Δp
   C. Δp2
   D. Δp/2

3. A pipe has a porous section of length L as shown in the figure. Velocity at the start of this section of V0. If fluid leaks into the pipe through the porous section at a volumetric rate per unit area q(x/L)2, what will be axial velocity in the pipe at any „x‟? Assume incompressible one dimensional flow i.e., no gradients in the radial direction ?

   A. VX = V0 + q (x3/L2D)
   B. VX = V0 + ⅓q (x3/L2)
   C. VX = V0 + 2q (x2/LD)
   D. VX = V0 + (4/3) q (x3/L2D)

4. Equivalent length of a pipe fitting is____________________?

   A. Dependent on Reynolds number
   B. Independent of Reynolds number
   C. Dependent on the length of the pipe
   D. None of these

5. Transition length for turbulent flow in smooth pipe is equal to _____________ times the pipe diameter?

   A. 0.5
   B. 5
   C. 50
   D. 500

6. For turbulent fluid flow in pipe, the expression for Prandtl one seventh power law is (where, r = pipe radius, x = distance) ?

   A. V/Vmax = (x/r)1/7
   B. V/Vmax = (r/x)1/7
   C. V/Vmax = (x.r)1/7
   D. None of these

7. The head loss in turbulent flow in pipe is proportional to(where, V = velocity of fluid through the pipe) ?

   A. V2
   B. 1/V2
   C. 1/V
   D. V

8. For laminar flow of Newtonian fluids through a circular pipe, for a given pressure drop and length & diameter of pipe, the velocity of fluid is proportional to (where, μ = fluid viscosity ) ?

   A. μ
   B. 1/μ
   C. √μ
   D. 1/√μ

9. The pipe wall thickness is minimum for a pipe of given nominal size having schedule number___________________?

   A. 160
   B. 120
   C. 80
   D. 40

10. Nominal Pipe Size (NPS) of a pipe less than 12 inches in diameter indicates its________________?

    A. Inner diameter
    B. Outer diameter
    C. Thickness
    D. Neither inner nor outer diameter