MCEEE102 Environmental Chemistry & Microbiology M.Tech Model Question Paper : mgu.ac.in

Name of the College : Mahatma gandhi University
Department : Civil Engineering
Subject Code/Name : MCEEE 102/ENVIRONMENTAL CHEMISTRY AND MICROBIOLOGY
Sem : I
Website : mgu.ac.in
Document Type : Model Question Paper

Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/mgu.ac.in/4998-MCEEE%20102(1).doc

MGU Environmental Chemistry & Microbiology Question Paper

M.TECH. DEGREE EXAMINATION,
Branch: Civil Engineering
Specialization : Environmental Engineering

Related : MGU MCEEE106-4 Environmental Impact Assessment M.Tech Model Question Paper : www.pdfquestion.in/5002.html

Model Question Paper – I :
First Semester
MCEEE 102 ENVIRONMENTAL CHEMISTRY AND MICROBIOLOGY
(Regular – 2013 Admissions)
Time : Three Hours
Maximum : 100 marks
Instructions:
1) Answer questions in full.
2) Assume suitable data wherever necessary.

December 2012

1. a) State and Explain Raoult’s law. (5)
b) What are buffer solutions? Explain. Derive Henderson Hasselbalch’s equation for pH of a
buffer solution. (10)

c) Calculate the pH of a buffer solution prepared with 20 mg/L carbonic acid and 50 mg/L of
bicarbonate ion, under the following conditions. Assume a closed system.
i) Initially
ii) After 3ml of 0.02 N H2SO4 is added
iii) After 3ml of 0.02 N NaOH is added (10)
OR

2. a) State and explain Le Chatlier’s principle. (5)
b) What is the molar concentration of a solution containing 10 g/L of i) NaOH ii) Na2SO4. (5)
c) Explain the different types of adsorptions. (5)

d) Briefly explain:
i) Zeta Potential
ii) Osmosis
iii) Principle of Solvent extraction (10)

3. a) What is the relationship between i) pH and hydrogen ion activity
ii) pH and hydroxyl ion activity (5)
b) Explain the three major kinds of alkalinity found in natural waters. (5)

c) Discuss the principles involved in the EDTA titrimetric method of measuring hardness. (5)
d) Explain the importance of following parameters in water analysis.
i) BOD ii) COD iii) DO (10)
OR

4. a) Give the applications of COD analysis in environmental engineering. (5)
b) Explain the environmental significance of iron and manganese in water supplies. (5)
c) Briefly explain anyone method for determination of chloride concentration in water. (5)
d) Discuss the i) acid – base reaction and ii) Ion exchange reaction in soil. (10)

5. . a) Define Microbiology. What are the major characteristics of a microorganism?
(10)
b) How can you examine a microorganism using wet mount technique? Explain a type of differential stain used to identify microorganisms. (15)
OR

6. a) List out the microorganism involved in contamination of water. Name some of the water borne diseases and their causative agents. (10)
b) What is membrane filter technique? Explain a method (MPN TECHNIQUE) for testing faecal contamination in water samples. (15)

7. Explain how biotechnology is applied in waste treatment and how is it beneficial to mankind? (25) OR
8. Define sterilization, factors influencing sterilization, its principles and methods. (25)

December 2013

M.Tech. Degree Examination,  :
Branch : Civil Engineering
Specialization :
1. Environmental Engineering
2. Transportation Engineering
Model Question Paper – I :
First Semester
MCETE101/MCEEE 101 Applied Statistics & Probability : (Regular – 2013 Admissions)
Time : Three Hours
Maximum : 100 marks

Instructions :
1) Answer questions in full.
2) Assume suitable data wherever necessary.

I i) The first three moments of a distribution about the value 2 of a variable are 1,16and -40. Find the mean, variance and third central moment of the distribution. (8 marks)
ii) Explain about Skewness and kurtosis. Find Pearsonian coefficient of skewness for a group of 10 items. Given and mode=43.7 (8 marks)

iii) Find the kurtosis of the data given below.
Class interval 0-10 10-20 20-30 30-40
Frequency 1 3 4 2 (9 marks)
OR

II. (i) The marks of the students in certain examination are normal distribution with mean marks as 40% and SD marks as 20 % On this basis 60% students failed . The result was moderated and 70 % students passed . Find the pass marks before and after the moderation. ( 13 marks )
(ii) Fit a Poisson distribution to the following data and calculate the theoretical frequencies
x : 0 1 2 3 4
f : 123 59 14 3 1 ( 12 marks )

III. Explain different types of sampling techniques with its application ( 25 marks )
OR
IV. (i) From the following data , obtain the two regression equations
Sales : 91 97 108 121 67 124 51 73 111 57
Purchase : 71 75 69 97 70 91 39 61 80 47 (13 marks )
(ii) Can regression equations be used for projections ? If so what are the assumptions  underlying it ?Also give some examples . ( 12 marks )

V. (i) Mean morphometic values of workers of Apis Cerana measured in mm were as follows
Labrum length : 0.42 0.43 0.40 0.33 0.36 0.40 0.32 0.40 0.38 0.36 0.40 0.33 0.35
Labrum breadth : 1.10 1.02 1.00 1.00 1.02 0.99 1.00 1.00 1.00 1.00 1.01 1.00 0.99
Test the significance of the regression coefficient ( 12 marks )

(ii) The mean weight loss of n=16 grinding balls after a certain length of time in mill slurry is 3.42gms with a SD of 0.68gms . Construct 99% of confidence interval for the true mean weight loss of such grinding balls under the stated condition . ( 13 marks )
OR

VI. ( i) The following are the average weekly losses of worker hrs due toaccidents in 10  industrial plants before and after a certain safety program was put into operation
Before :45 73 46 124 33 57 83 34 26 17
After : 36 60 44 119 35 51 77 29 24 11
Use 0.05 l.s to test whether the safety program is effective . ( 13marks )

(ii) The following figures show the distribution of digits in numbers chosen at random from a telephone directory
Digits : 0 1 2 3 4 5 6 7 8 9
Frequency : 1026 1107 997 966 1075 933 1107 972 964 853
Test whether the digits may be taken to occur equally frequently in the directory .