Sedimentation tanks in a water treatment plant are required to be designed to achieve a minimum hydraulic detention time of 3.0 hours and a maximum overflow rate (surface loading rate) of 750. gal/d/ft2. For a water production rate of 500,000. gal/d, determine the dimensions of rectangular sedimentation tanks required (length, width, depth). Round dimensions to the nearest ft. There should be a minimum of 2 tanks in parallel for reliability.

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

What precautions should you take to prevent injuries when dealing with heavy loads?

Compute the pressure drop of 30°c air flowing with a mean velocity of 8 m/s in a circular sheet-metal duct 300 mm in diameter and 15 m long. use a friction factor, f 0.02, and pair = 1.1644 kg/m a. 37.26 pa b. 25.27 pa n c. 29.34 pa d. 30.52 pa