GTU previous question papers
GUJARAT TECHNOLOGICAL UNIVERSITY
B. E. Sem. – V – Examination – June- 2011
Subject code: 1506
Subject Name: Environmental Engineering
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) State the physical and chemical characteristics of water and describe in detail any two physical and chemical characteristics.
(b) State the difference between BOD & COD.
BOD of a sewage sample incubated for 5 day at 200 C temperature is 140
mg/l. calculate BOD for 2 day incubation and 300 C temp. for the same
sample. Assume K (20) = 0.1 per day .
Q.2 (a) Explain the term hardness of water, and classify the same. Why hardness is
determined for source water?
From the following data of volumetric analysis, calculate the different species
of alkalinity and find the total alkalinity. Take the volume of sample = 10ml.
Normality of H2SO4 = 1/50
Sample Total ml of
Total ml of Methyl
A 20 38.6
Also assume the pH value of this sample of water.
(b) Explain 1st stage BOD and derive its formula with usual notations Lt = L0 (1-10-kt )
(b) State the conditions favorable for the disposal of sewage on land.
Q.3 (a) Explain primary and secondary air pollutions. State the effects of air pollution on plant and material.
(b) What is solid waste management? State the composition and characteristics of the municipal solid waste.
Q.3 (a) State different pollutants in industrial wastewater and explain briefly their effects.
(b) State different processes for the treatment of industrial waste water and explain any two of them.
Q.4 (a) Describe various types of microbial and explain microbial growth.
(b) Explain with sketch DO sag curve and write stricter Phelp’s equation.
Q.4 (a) What is house drainage? Describe the principles of house drainage.
(b) Define (i) vent pipe (ii) rain water (iii) anti-siphonage pipe.
Classify the traps according to shape and describe with sketch the same.
Q.5 (a) What is noise pollution. Write its adverse effects and suggest the essential
(b) Describe briefly various methods of collection of solid waste.
Q.5 Write short note any FOUR.
(i) Assessment of quantity of domestic requirement of water
(ii) Indian Standards for drinking water.
(iii) Environmental audit.
(iv) Typical composition of dairy waste.
(v) Environmental significance of alkalinity and pH.