The oxygen consumption of an activated sludge plant is 60 g O2/L. d for the degradation of carbon compounds. In addition, 50 % of this quantity is required for the nitrification. How many
percent of the nitrogen inflow load of 10 g N/L. d are oxidized with a specific oxygen
consumption of 4.6 g O2/g N?

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Manometers are good examples of measuring instruments, nowadays they are not as common as before. a)-capacitive probe gauges b)-gravitational gauges deformation ) gauges d)-digital gauges

The flow rate of air through a through a pipe is 0.02 m5/s. a pitot static tube is placed in the flow. the radius of the pitot static tube is 1 mm. assuming the flow to be steady and the air to be at 300k, calculate the difference in total and static pressure if the diameter of the pipe is: (a) d 0.1 m d 0.05 m (c) d 0.01 m