In case of Venturimeter, friction losses are about _____________ percent of maximum velocity head?

Related Mcqs:

1. The net positive suction head (NPSH) of a centrifugal pump is defined as the sum of the velocity head and the pressure head at the_________________?

   A. Discharge
   B. Suction
   C. Suction minus vapor pressure of the liquid at suction temperature
   D. Discharge minus vapor pressure of the liquid at the discharge temperature

2. If three pipes of different diameters, lengths & friction factors are connected in parallel, then (where, Q = flow rate, V= fluid velocity f = friction factor). ?

   A. Q = Q1 + Q2 + Q3
   B. V1 = V2 = V3
   C. Q1 = Q2 = Q3
   D. f = f1 + f2 + f3

3. 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

4. Permanent pressure loss in a well designed Venturimeter is about _____________ percent of the venturi differential?

   A. 1
   B. 10
   C. 30
   D. 50

5. The exit cone angle in case of a standard Venturimeter is _____________ the entrance cone angle?

   A. Smaller than
   B. Greater than
   C. Equal to
   D. Either A. or B.

6. In case of turbulent flow of a Newtonian fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity)?

   A. Vavg
   B. 1.2 Vavg
   C. 1.5 Vavg
   D. 1.8 Vavg

7. The ratio of average fluid velocity to the maximum velocity in case of laminar flow of a Newtonian fluid in a circular pipe is_____________________?

   A. 0.5
   B. 1
   C. 2
   D. 0.66

8. Permanent loss in a Venturimeter is about ___________ percent of the pressure drop in the upstream cone?

   A. 1
   B. 10
   C. 40
   D. 70

9. Velocity head on sudden enlargement in a horizontal pipe is converted into ______________ head?

   A. Elevation
   B. Pressure
   C. Both A. & B.
   D. Neither A. nor B.

10. The energy loss in flow through Venturimeter is less than that through flow nozzle, because in case of a flow nozzle, the ?

    A. Length is shorter
    B. Throat diameter is more
    C. Sudden expansion of flow in the downstream occurs
    D. Distance between the throat and the inlet is more