CIVENG 2O04 Chapter 3: 2O04 - Ch.3 Fluid Statics - Absolute & Gage Pressure.pdf

What is the difference between the pressures inside and outside a bicycle tire called?

1. Absolute pressure

2. Atmospheric pressure

3. Gauge pressure

4. None of these

The water in a tank is pressurized by air, and the pressure is measured by a multifluid manometer as shown above. Determine the gage pressure of air in the tank.

If

=0.2 m, =0.3m, and =0.46m.

Take the densities to be:

During a flow of 500 liters, the gage pressure is 68 kPa in the horizontal 300 mm supply line of a water turbine. A 41 kPa vacuum is measured at a 450 mm section of draft tube 2 m below the turbine. Assuming an efficiency of 85%,

a. Compute the total head extracted by the turbine.

b. Compute the output horsepower of the turbine.

c. Compute the input horsepower of the turbine.