Name of the College : Mahatma gandhi University
Department : Civil Engineering
Subject Code/Name : MCEEE 103/PRINCIPLES OF PHYSICO-CHEMICAL TREATMENT
Sem : I
Website : mgu.ac.in
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/mgu.ac.in/4999-MCEEE%20103%20-2(2).doc
Principles of Physico-Chemical Treatment :
M.TECH. DEGREE EXAMINATION, December 2013 :
Branch: Civil Engineering
Specialization : Environmental Engineering
Related : MGU MCEEE102 Environmental Chemistry & Microbiology M.Tech Model Question Paper : www.pdfquestion.in/4998.html
Model Question Paper – I
First Semester :
MCEEE103 : PRINCIPLES OF PHYSICO-CHEMICAL TREATMENT
(Regular – 2013 Admissions)
Time : Three Hours
Maximum : 100 marks
Instructions :
1) Answer questions in full.
2) Assume suitable data wherever necessary.
3) Graph Paper may be supplied.
1. a. Explain the Hydraulic characteristics of complete mix and plug flow reactors based on the tracer response curves by pulse and step dosage in ideal and non-ideal situations. Derive the expressions for pulse flow and step input tracer response curve in ideal flow complete mix reactors. (Use mass balance analysis). (20 Marks)
b. Given the following rate data concerning the decomposition of sodium azide into nitrogen gas, determine its rate law including the rate constant with the appropriate units.
Time (sec.) 0 1 5 10 15 20
[NaN3] (M) 0.500 0.473 0.378 0.286 0.216 0.163 (5 Marks)
OR
2. a. Why is equalization necessary in a wastewater treatment plant? With diagrams differentiate on-line and off-line equalization. (10 Marks)
b. What is meant by order of a chemical reaction? Derive the expression for reaction constant in first order kinetics. What is half life of a reaction? What is the half-life of a zero order reaction and first order reaction? (10 Marks)
c. Explain the principal types of reactors used for the treatment of wastewater with their applications. (5 Marks)
3. a. Explain the Activated Carbon Adsorption Kinetics. Explain the principle based on which bed life is estimated in Activated Carbon filter? (12 Marks)
b. What are the differences of application of GAC & PAC in water & wastewater Treatment? (8 Marks)
c. What are the applications of air striping treatment? (5 Marks)
OR
4. a. Differentiate the principles of Electro dialysis and Reverse osmosis compared to other membrane separation treatments. (5 Marks)
b. Explain Multiple effect evaporation & Multi stage flash evaporation for the distillation of saline water with neat schematics sketches. (10 Marks)
5. a. Explain the chemistry of chlorination. Explain the different stages of break point chlorination with suitable stoichiometric equations & sketch. (15 Marks)
b. Describe different applications of chemical oxidation in water/wastewater treatment. (10 Marks)
OR
6. a. Differentiate coagulation and flocculation process. (5 Marks)
b. What type of coagulant is used for boiler feed water? Why? Describe the chemistry of coagulation by Alum and Ferric chloride with suitable equations. (15 Marks)
c. Explain the importance of chemical additives in the process of floatation. (5 Marks)
7. a. Explain Ion-exchange process for water softening. How the capacity of Iron exchange resin is estimated? What are the methods for its regeneration? (15 Marks)
b. What is solvent extraction? Explain the different stages involved in the solvent extraction process. (10 Marks)
OR
8. a. Explain Oxidation of Refractory organic compounds in treated effluent? What is the principle of advanced oxidation by ozone &Hydrogen peroxide by producing hydroxyl radicals? (13 Marks)
b. Explain the following terms related with chemical oxidation:
i. Redox reactions
ii. Reaction potential
iii. Nernst equation for equilibrium constant (3 x 4 = 12 Marks)
M.Tech. Degree Examination, December 2013 :
Branch : Civil Engineering
Specialization : Environmental Engineering
Model Question Paper – I : First Semester
MCEEE 103 Principles Of Physico-Chemical Treatment : (Regular – 2013 Admissions)
Time : Three Hours
Maximum : 100 marks
Instructions :
1) Answer questions in full.
2) Assume suitable data wherever necessary.
3) Graph Paper may be supplied.
1. a. Explain the Hydraulic characteristics of complete mix and plug flow reactors based on the tracer response curves by pulse and step dosage in ideal and non-ideal situations. Derive the expressions for pulse flow and step input tracer response curve in ideal flow complete mix reactors. (Use mass balance analysis). (20 Marks)
b. Given the following rate data concerning the decomposition of sodium azide into nitrogen gas, determine its rate law including the rate constant with the appropriate units.
Time (sec.) 0 1 5 10 15 20
[NaN3] (M) 0.500 0.473 0.378 0.286 0.216 0.163 (5 Marks)
OR
2 a. Why is equalization necessary in a wastewater treatment plant? With diagrams differentiate on-line and off-line equalization. (10 Marks)