Coefficient of velocity for Borda’s mouth piece running full is________________?

Related Mcqs:

1. If a sphere of diameter 1 cm falls in castor oil of kinematic viscosity 10 stokes, with a terminal velocity of 1.5 cm/sec, the coefficient of drag on the sphere is________________?

   A. less than 1
   B. between 1 and 100
   C. 160
   D. 200

2. The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is________________?

   A. 0.223 R
   B. 0.423 R
   C. 0.577 R
   D. 0.707 R

   where R is radius of pipe

3. Coefficient of velocity of venturimeter_________________?

   A. is independent of Reynolds number
   B. decreases with higher Reynolds number
   C. is equal to the coefficient of discharge of venturimeter
   D. none of the above

4. In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is_________________?

   A. 22.5 m/sec
   B. 33 m/sec
   C. 40 m/sec
   D. 90 m/sec

5. 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

6. The ratio of average velocity to maximum velocity for steady laminar flow in circular pipes is_______________?

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

7. The depth ‘d’ below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be_________________?

   A. 0.423 D
   B. 0.577 D
   C. 0.223 D
   D. 0.707 D

   where D is the depth of flow

8. In a forced vortex motion, the velocity of flow is________________?

   A. directly proportional to its radial distance from axis of rotation
   B. inversely proportional to its radial distance from the axis of rotation
   C. inversely proportional to the square of its radial distance from the axis of rotation
   D. directly proportional to the square of its radial distance from the axis of rotation

9. Coefficient of contraction for an external cylindrical mouthpiece is_________________?

   A. 1.00
   B. 0.855
   C. 0.7H
   D. 0.611

10. For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is_______________?

    A. constant
    B. dependent only on Reynolds number
    C. a function of Reynolds number and relative roughness
    D. dependent on relative roughness only