Fluid Mechanics Quiz

Measurement of Pressure Losses in Pipes

1. Measurement of pressure losses in pipes under pressure can be made with: Piezometers

Flow Number and Linear Losses Factor

2. The flow number a is expressed in units: This value is dimensionless.

3. The linear losses factor f can be determined on the basis of: Relative roughness and Reynolds Number.

Orifice and Pump Head

4. The ISA orifice can be used to measure: Flow rate.

5. The pump head can be determined from: Bernoulli equation.

Absolute Roughness and Outlet Pressure

7. Absolute roughness can be determined: From Colebrook-White's formula.

8. The outlet pressure in the nozzle depends on: Flow rate in the nozzle.

Hydrostatic Pressure and Force

9. The unit of hydrostatic pressure in the SI system: kg/(m*s^2)

10. Hydrostatic force: The force with which the fluid acts on a particular surface, perpendicular to that surface.

Pump Characteristic and Jet Forces

11. The pump characteristic (the pump curve): Relationship between pump head and flow rate.

13. Units of jet forces in SI: N

14. The value of the local (minor) loss factor depends on: Type of fittings installed.

15. Jet force: Force developed by moving fluids.

Orifice Flow and Discharge Coefficient

16. In the formula Q = CdA/2gH, the value of H means: Elevation of the water table above the lowest point of the orifice.

17. The achievement of steady-state motion during the test of liquid outflow through the orifice is demonstrated by: Constant height of the water table above the axis of the orifice.

18. In steady motion, the discharge coefficient for a flat and rounded orifice with the same outlet diameter will be: Larger for a flat orifice than for a rounded orifice.