Bihar engineering university Environmental Engineering question paper with solution. BEU pyq solution. Go through beu previous year solution before exams . BEU question paper solution Environmental engineering -1 2022
BEU Environmental Engineering solution 2022
(a) The distribution mains are designed for
(i) maximum daily demand
(ii) maximum hourly demand
(ii) average daily demand
(iv) maximum hourly maximum day demand on
Environmental Engineering solution 2022 pdf is provided below
(b) As compared to geometrical increase method of forecasting population, arithmetic increase method gives
(i) lesser value
(ii) higher value
(iii) same value
(iv) accurate value
(c) Methemoglobinemia, the “blue baby” syndrome is caused by consuming water containing excess of
(i) fluoride
(ii) phosphate
(iii) nitrate
(iv) nitrite
(d) The temporary hardness in water is caused by the presence of bicarbonates of Ca and Mg
(i) sulphates of C and Mg
(ii) chlorides of Ca and Mg
(iii) nitrates of Ca and Mg
(e) A wastewater sample 10-56 contains mmol/L of OH ions at 25 °C. The pH of this sample is
(i) 8-6 (ii)8.4 (ii) 5.6 (iv) 5.4
(f) Which of the following chemicals is employed for dechlorination of water?
(i)Sodium sulphite (ii) Sodium bicarbonate (iii) Calcium carbonate (iv) Hydrogen peroxide
(g) Turbidity is measured on
(i)standard silica scale (ii) standard cobalt scale (iii) standard platinum scale (iv) platinum cobalt scale
(h) Zero hardness of water is achieved by
(i) using lime soda process
(ii) excess lime treatment
(iii)Ton-exchange method
(iv) using excess alum dosage
2. (a) Discuss in detail, the various factors which affect the rate of demand.
(b) The population of 5 decades from 1930 to 1970 are given below. Find out the population after one, two and three decades beyond the last known decade, by using arithmetic increase method.
3. (a) What are infiltration. galleries’ and infiltration wells? Explain both with neat sketches.
(b) Water contains 210 g of CO 122 g of HCO3 and 68 g of OH. What is the total alkalinity of water expressed as CaCO3?
4. (a) What is turbidity? What are principles involved An the measurement of turbidity by Jackson’s and Nephelo turbidity meter?
(b) in a water treatment plant, the pH values of incoming and outgoing waters are 7-2 and 8-4 respectively Assuming a linear variation of pH with time, determine the average pH value of water.
5. (a) Describe in detail, the methods employed to purify water before supplying to the consumers.
(b) Compute the dimensions of a continuous flow rectangular settling tank treating average of 24×105 litres/day. Take detention period for raw water sedimentation to be 6 hours.
6. (a) Describe with a neat sketch the working of a pressure filter. What are the relative advantages and disadvantages of this type over those of the gravity types?
(b) Mention any three methods of softening water. Describe zeolite softening water in detail. process of
7. (a) Illustrate with sketches the different types of layouts of pipe systems in distributing water and compare their comparative merits and demerits.
(b)Mention the methods of disinfection Describe chlorination in detail.
8. What is plume? Explain various plume behaviour in detail with the help of neat sketches.
9. Write short notes on any four of the following ;
(a)Alkalinity (b)Coagulation and flocculation (c) Disinfection and sterilization (d)Secondary air pollutants (e) Aeration (f) Fabric filter
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