Janardan Rai Nagar Rajasthan Vidyapeeth 2006 B.Tech Civil Engineering WATER AND WASTE WATER ENGINEERING - Question Paper

Model Question Paper

BSC2- WATER AND WASTE WATER ENGINEERING

Time : 3 hrs Maximum marks : 75

 

Instruction:

1. Question paper is divided into Group A, Group B and Group C

2. Each Group is 25 Marks

3. Figure to the right in bracket indicates marks.

4. Good Handwriting is expected

5. Assume suitable data if necessary.

 

Group A (25 Marks)

 

Answer any three questions (Question 1 is compulsory)

	(5)

 

Q.1 What is the necessity of water supply schemes in the present day community ?

(10)

Q.2 Give the standards for domestic water quality for following

i) Colour ii) Turbidity iii) Temperature iv) pH value v) Total solids

vi) Hardness vii) Manganese viii) Sulphase ix) B.O.D x) Chloride

	(10)

 

Q.3 Explain different types of water demand for town ?

(10)

Q.4. What are the intakes ? What point should be kept in mind while selecting a site

for intake works ?

(10)

Q.5. What are the requirement of distribution system ? Describe in brief various types of

Distribution systems ?

 

Group B (25 Marks)

 

(5)

Answer any three questions (Questions 6 is compulsory)

 

Q.6 A water works has to purify the water for a town whose daily

demand is 910⁶ liters/day. Design the suitable sedimentation tank of the water

works fitted. The mechanical sludge remove. Assume the velocity of flow in the

sedimentation tank as 22 cm/minute and the detention period as hours.

(10)

Q.7 The B.O.D. of sewage incubated for 5 days at 30⁰c is 125 mg/lit. Calculate the B.O.D.

at 20⁰c. Assume K₂₀ = 0.1

	(10)

 

Q.8 Give comparison of conservancy and water carriage System ?

	(10)

 

Q.9 Why it is necessary to collect, treat and dispose of waste products of town ?

Q.10. The population of five decades from 1940 to 1980 are given below find out the population

in decades 1990 , 2000 and 2010 by using decrease rate of growth methods ?

Year	1940	1950	1960	1980
Population	25000	28000	32500	4500

Group C (25 Marks)

All Questions are Compulsory.

Q.11 Fill in the blanks ( each question carry 2 marks)

1. The total consumption in domestic water demand is ___________

2. The formulae for determination of future population by Arithmetical increase method is given by

_________

3. The main function of __________ is to collect water from surface source and then discharge water

so collected by means of pump.

4. The pH value for a potable water is ________

5. The pipe installed for purpose of ventilation is known as __________

 

Q.11 Multiple choice question. (Each question carry 2 marks)

1. The pattern of sewers carrying storm water are laid in such way as to seek the shortest possible

path to natural water courses is called.

a) Perpendicular pattern b) Radial pattern c) Fan pattern d) None of these.

2. The quantity of water required for fire fighting is generally given by

a) Q= 4640 b) Q = 4640 c) Q = 4640 (1-0.1)

d) None of these

3. The value of industrial demand of water is

a) 25 lpcd b) 30 lpcd c) 40 lpcd d) 45

4. The pipe which carries discharge from soil fittings such as urinals , w/c .

a) Soil pipe b) Vent pipe c) Waste pipe d) None of these

5. The lowermost level of a sewer is known as

a) Invert b) Back lever c) Upstream level d) None of these

 

Q.11 True or false (each question carry 1 marks).

1. Some times conservancy system is also called dry system.

2. Semicircular section of drain is mostly used for small drain due to its easiness in laying, stability

and cheapness.

3. The domestic demand of water is 40 lpcd.

4. Mostly water waste are designed for 20 30 yrs.

5. The open channels supported above the ground over trestles are called as flumes.

 

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