particulate sample in an air stream is represented by the following weight percent distribution: 5micrometers, 10%; 10 micrometers, 20%, 40 micrometers, 40%, 70 micrometers, 20%; 100 micrometers, 10 percent. A cyclone seperator is employed on the basis of the following data: inlet width, 12 inches; effective turns, 4; inlet gas velocity, 20ft/s; particle density, 1.6 g/cm3; gas density, 0.074 lb/ft3, gas viscosity, 0.045 lb/ft hr. Estimate the percentage of the total weight removed in the cyclone. b) If the

In breakpoint chlorination test, it is found that the free/residual chlorine concentrations are as same as the corresponding chlorine dose added to the samples. How will the test data look like in a graphical form? Select all those are correct. The line will show the pick hump. The line slopes 45 degree. The line is parallel to the zero-demand line. The breakpoint will be clearly visible in the graph.

Problem 4. A receipt of surface water sample is given in Table below: Substance Concentration (mg/L) Total Hardness 1000 mg/L CaCO3 Phenolphthalein acidity 5 mg/L CaCO3 Phenolphthalein Alkalinity 3 mg/L CaCO3 It is known that phenolphthalein alkalinity is only due to CO3²- and phenolphthalein acidity is only due to H₂CO3. Assuming the hardness of sample is because of calcium and magnesium ions, alkalinity-acidity are due to the carbonate species, calculate: a) The pH of sample. b) Temporary and permanent hardness as mg/L CaCO3. c) Total alkalinity and acidity as mg/L CaCO3. Molecular weights (g/mole): Ca = 40, Mg = 24, H = 1, C = 12, 0 = 16

IL Test sample weight= احتمان Sieve size Weight retained (g) Calculations: Sieve size in. (mm) 3/8" 9.5 mm No.4 4.75 mm No.8 2.36 mm No.16 1.18 mm No.30 0.6 mm No.50 0.3 mm No.100 0.15 mm Pan gm 3/8" No.4 No.8 No.16 No.50 No.100 0.15 mm 9.5 mm 4.75 mm 2.36 mm 1.18 mm mm 0.3 mm 0.0 од 1597 21419 від 50д 3589 174д Weight retained (g) Percent retained Beitel 15-11-2021 Fineness modulus отсивно о u 4/8²/00 = 5.3 15 діни з 2141-44871.3 61-448203 Божнизис 1.66 50 78.63 21.3 80.29 19.71 35 84421 23 92.22 7.78 174448518 98.02 1.98 чудд 4 /100 = Cumulative = No.30 Percent cumulative 0 53 94.7 766 23-4 Percent passing loo 222 Sieve deviation = 262 (5) ASTM Limit 100 95 100 80 100 50_85 25 60 10_30 2_10