College of Engineering Env The exan has 2 parts part 125 poi

College of Engineering Env The exan has 2 parts, part 1(25 points) has oulei 4 open questions. There is also question (1 l c a bonus question (10 poimts). You can use only the atached fom Part 1 (25 points) option? ities is sedimentation an effective 1. (s points) For which of the following impuri (a) Dissolved solids (b) Suspended solids (c) Colloidal particles for false. atements with either \"T\" for true or \" 2 (5 points) Mark each one of the following st ional method for estimating peak runoff is applicable for large drainage areas. The rat Agriculture States\' consumptive water use. are sources of water. accounts for the majority of the United (c)--For base flow in a stream, both direct runoff and exfiltration tIn an ideal plug flow reactor, does mixing does not occur in the longitudinal direction. 3. (s points) To graphically determine if a reaction is first order or not, one should plot: (a) Concentration versus time b) Natural log of the concentration versus time (c) Inverse concentration versus time (d) S quare root of concentration versus time (5 points) How is total rainfall, P, determined from rainfall intensity, I, and duration, t? (a) P = It

Solution

1. (b) Sedimentation removes suspended solids. The concept behind sedimentation is the difference in specific gravity of suspended particles and the medium. If the specific gravity of suspended solids is larger than the medium, sedimentation takes place.