COLLEGE OF ENGINEERING & TECHNOLOGY, CAIRO
Course
Course No
Lecturer
: ENVIRONMENTAL SCIENCE & TECH.
: NE466
: Prof. Ola Elmonayeri, Dr. Mohamed Elsayad.
Quizes
1. Given two (hrs.) of (50+(x*10)) (dB) exposure, two (hrs.) of (40+(x*10)) (dB) exposure and two (hrs.)
of (20+(y*10)) (dB) exposure, what is the % dose using the PEL? (Is this person overexposed compared
to PEL?)
2. If you know that ozone (NO) in standard atmospheric air at a concentration of Wp = (0.00000007). If
you know that air density equal 1.25 kg/m3 and molecular weight Mp is 30.
➢ Compute the Yp, Pp values for the O3 concentration in the atmosphere.
➢ Calculate the Air Quality Index corresponding to 24-hrs reading for P.M2.5
3. For the given water components data sheet you need to calculate the required:
Parameter
pH
Elect. Conductivity
Total Disolved Solids
Total Hardness
Calcium
Chloride
Nitrates
Sulphates
Dissolved Oxygen
BOD
Vobs
Si
Wi
7+x
40+(y*10)
40+(y*10)
40+(y*10)
7+x
40+(y*10)
7+x
40+(y*10)
7+x
7+x
6.5-8.5
250
500
300
75
250
50
200
5
5
0.02
0.2
0.2
0.2
0.02
0.2
0.02
0.2
0.2
0.2
➢ Calculate water quality index.
➢ Define the class of water quality index
➢ Calculate one observed value that could enhance the class of water quality index for one grade.