Curve III in the bellow diagram represents a/an________________?

Related Mcqs:

1. Venturimeters, orificemeters and nozzles are used to measure the fluid discharge from a pipeline. The average fluid velocity in a pipeline can be measured by a/an________________?

   A. Weir
   B. Hot wire anemometer
   C. Cup and vane anemometer
   D. None of these

2. The curve of metacentre for a floating body ____________ the curve of buoyancy?

   A. Is always below
   B. Is the evolute of
   C. Intersects at right angle
   D. Is tangential to

3. Characteristic curves for a centrifugal pump plotted against its capacity is shown in the diagram. x, y and z denote respectively_______________?

   A. Efficiency, head and B.H.P.
   B. Head, efficiency and B.H.P.
   C. B.H.P., efficiency and head
   D. Efficiency, B.H.P. and head

4. For a reciprocating pump, the indicator diagram is the graph between the________________?

   A. Discharge and overall efficiency
   B. Volume swept by piston for one complete revolution and the pressure in the cylinder
   C. Angle swept by the crank pin at any instant and the discharge
   D. None of these

5. Which of the following must be followed by the flow of a fluid (real or ideal)? (I) Newton’s law of viscosity. (II) Newton’s second law of motion. (III) The continuity equation. (IV) Velocity of boundary layer must be zero relative to boundary. (V) Fluid cannot penetrate a boundary?

   A. I, II, III
   B. II, III, V
   C. I, II, V
   D. II, IV, V

6. Each term of the Bernoulli’s equation written in the form, (p/ρ) + (g/gc). Z + (v2/2gc) = constant, represents the total energy per unit ________________?

   A. Mass
   B. Volume
   C. Specific weight
   D. None of these

7. The rate of change of moment of momentum represents the ______________ by the fluid?

   A. Torque applied
   B. Force exerted
   C. Work done
   D. Power developed

8. Each term in Bernoulli‟s equation represents the _____________ of the fluid?

   A. Energy per unit mass
   B. Energy per unit weight
   C. Force per unit mass
   D. None of these

9. Horsepower increase of a centrifugal gas compressor without altering the volumetric flow rate will _____________ the gas discharge pressure?

   A. Increase
   B. Decrease
   C. Not change
   D. Exponentially decrease

10. In centrifugal pumps, cavitation occurs, when pressure of the impeller eye or vane becomes_______________?

    A. Less than atmospheric pressure
    B. More than liquid vapor pressure
    C. Less than liquid vapor pressure
    D. More than atmospheric pressure