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

Related Mcqs:

1. Schedule number of a pipe, which is a measure of its wall thickness, is given by ________________?

   A. 1000 P’/S
   B. 100 P’/S
   C. 1000 S/P’
   D. 10000 P’/S

2. Nominal size of the discharge pipe of a pump is usually _____________ the nominal size of the inlet pipe?

   A. Smaller than
   B. Larger than
   C. Same as
   D. Twice

3. I.D. of 1/4″ schedule 40 pipe is 0.364″. I.D. of a 1/2″ schedule 40 pipe would be ______________ inch?

   A. 4.728
   B. 0.5
   C. 0.622
   D. 0.474

4. What is the ratio of displacement thickness to nominal thickness for a linear distribution of velocity in the boundary layer on a flat plate ?

   A. 0.5
   B. 1
   C. 1.5
   D. 2

5. 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

6. 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

7. 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)

8. What is the shear rate at the pipe wall, in case of laminar flow of Newtonian fluids in a pipe of diameter ‘D’ & length ‘L’ incurring a pressure drop ‘Δp’ with average velocity ‘Vavg’ ?

   A. D Δp/8L
   B. D Δp/4L
   C. 8 Vavg/D
   D. 4 Vavg/D

9. For turbulent flow in smooth circular pipe, the velocity distribution is a function of the distance ‘d’ measured from the wall of the pipe and the friction velocity ‘v’, and it follows a _____________ relationship?

   A. Logarithmic
   B. Linear
   C. Hyperbolic
   D. Parabolic

10. 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