When time of closure tc = L/v0 (where L is length of pipe and v0 is speed of pressure wavE., the portion of pipe length subjected to maximum head is__________________?

Related Mcqs:

1. The speed of a pressure wave through a pipe depends upon________________?

   A. the length of pipe
   B. the viscosity of fluid
   C. the bulk modulus for the fluid
   D. the original head

2. The length of a pipe is 1 km and its diameter is 20 cm. If the diameter of an equivalent pipe is 40 cm, then its length is_____________________?

   A. 32 km
   B. 20 km
   C. 8 km
   D. 4 km

3. The horse power transmitted through a pipe is maximum when the ratio of loss of head due to friction and total head supplied is________________?

   A. 1/3
   B. 1/4
   C. 1/2
   D. 2/3

4. A valve is suddenly closed in a water main in wl.ich the velocity is 1 m/sec and velocity of pressure wave is 981 m/ sec. The inertia head at the valve will be________________?

   A. 1 m
   B. 10m
   C. 100m
   D. none of the above

5. Two pipes of same length and diameters d and 2d respectively are connected in series. The diameter of an equivalent pipe of same length is________________?

   A. less than d
   B. between d and 1.5 d
   C. between 1.5 d and 2d
   D. greater than 2d

6. The discharge of a liquid of kinematic viscosity 4 cm2/sec through a 8 cm dia-meter pipe is 3200n cm7sec. The type of flow expected is__________________?

   A. laminar flow
   B. transition flow
   C. turbulent flow
   D. not predictable from the given data

7. A fluid of kinematic viscosity 0.4 cm2/sec flows through a 8 cm diameter pipe. The maximum velocity for laminar flow will be__________________?

   A. less than 1 m/sec
   B. 1 m/sec
   C. 1.5 m/sec
   D. 2 m/sec

8. The maximum thickness of boundary layer in a pipe of radius r is____________________?

   A. 0
   B. r/2
   C. r
   D. 2r

9. A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the center of bottom is___________________?

   A. zero
   B. one-fourth its value when cylinder was full
   C. one-half its value when cylinder was full
   D. cannot be predicted from the given data

10. Surge wave in a rectangular channel is an example of_________________?

    1. steady flow
    2. unsteady flow
    3. uniform flow
    4. non-uniform flow
    The correct answer is?

    A. (1) and (3)
    B. (2) and (3)
    C. (1) and (4)
    D. (2) and (4)