Previous year question paper for WSWWE (Diploma Civil Engineering 4th)

                                                               A. WATER SUPPLY

1. Introduction (02 hrs)

1.1 Necessity and brief description of water supply system.

2. Quantity of Water (06 hrs)

2.1 Water requirement

2.2 Rate of demand and variation in rate of demand

2.3 Per capita consumption for domestic, industrial, public and fire fighting

uses as per BIS standards (no numerical problems)

2.4 Population Forecasting

3. Quality of Water (04 hrs)

3.1 Meaning of pure water and methods of analysis of water

3.2 Physical, Chemical and bacteriological tests and their significance

3.3 Standard of potable water as per Indian Standard

3.4 Maintenance of purity of water (small scale and large scale quantity)

4. Water Treatment (brief introduction) (09 hrs)

**4.1 Sedimentation - purpose, types of sedimentation tanks

**4.2 Coagulation floculation - usual coagulation and their feeding

**4.3 Filtration - significance, types of filters, their suitability

4.4 Necessity of disinfection of water, forms of chlorination, break point

chlorine, residual chlorine, application of chlorine.

4.5 Flow diagram of different treatment units, functions of (i) Areation

fountain (ii) mixer (iii) floculator, (iv) classifier, (v) slow and rapid sand

filters (vi) chlorination chamber.

5. Conveyance of Water (09 hrs)

**5.1 Different types of pipes - cast iron, PVC, steel, asbestos cement, concrete

and lead pipes. Their suitability and uses, types of joints in different types

of pipes.

5.2 Appurtenances: Sluice, air, reflux valves, relief valves, scour valves, bib

cocks, stop cocks, fire hydrants, water meters their working and uses

5.3 Distribution site: Requirement of distribution, minimum head and rate,

methods of layout of distribution pipes

5.3.1 Systems of water supply - Intermittent and continuous service

reservoirs - types, necessity and accessories.

5.3.2 Wastage of water - preventive measures

5.3.3 Maintenance of distribution system

5.3.4 Leakage detection

6. Laying out Pipes (06 hrs)

6.1 Setting out alignment of pipes

6.2 Excavation for laying of pipes and precautions to be taken in laying pipes

in black cotton soil.

6.3 Handling, lowering beginning and jointing of pipes

6.4 Testing of pipe lines

6.5 Back filling

6.6 Use of boring rods

7. Building Water Supply (02 hrs)

7.1 Connections to water main (practical aspect only)

**7.2 Water supply fixtures and installations and terminology related to plumbing

                                                  B. WASTE WATER ENGINEERING

8. Introduction (04 hrs)

8.1 Purpose of sanitation

8.2 Necessity of systematic collection and disposal of waste

8.3 Definition of terms in sanitary engineering

8.4 Collection and conveyance of sewage

8.5 Conservancy and water carriage systems, their advantages and

Disadvantages

8.6 (a) Surface drains (only sketches) : various types, suitability

(b) Types of sewage: Domestic, industrial, storm water and its seasonal

variation

9. Sewerage System (05hrs)

9.1 Types of sewerage systems, materials for sewers, their sizes and joints

9.2 Appurtenance: Location, function and construction features. Manholes,

drop manholes, tank hole, catch basin, inverted siphon, flushing tanks

grease and oil traps, storm regulators, ventilating shafts

10. Laying and Construction of Sewers: (6 hrs)

10.1 Setting out/alignment of sewers

10.2 Excavations, checking the gradient with boning rods preparation of

bedding, handling and jointing testing and back filling of sewers/pipes. 10.3 Construction of surface mains and different sections required

11 Sewage characteristics: (4hrs)

11.1 Properties of sewage and IS standards for analysis of sewage

11.2 Physical, chemical and bacteriological parameters

12. Natural Methods of Sewerage Disposal (5 hrs)

12.1 General composition of sewage and disposal methods

12.2 Disposal by dilution

12.3 Self purification of stream

12.4 Disposal by land treatment

12.5 Nuisance due to disposal

13. Sewage Treatment (9 hrs)

13.1 Meaning and principle of primary and secondary treatment and activated

sludge process their flow diagrams

13.2 Introduction and uses of screens, grit chambers, detritus tanks, skimming

tanks, plainsedimentation tanks, primary clarifers, secondary clarifers,

filters, control beds, intermittent sand filters, trickling filters, sludge

treatment and disposal, oxidation ponds (Visit to a sewage treatment plant)

14. Building Drainage (9 hrs)

14.1 Aims of building drainage and its requirements

**14.2 Different sanitary fittings and installations

14.3 Traps, seals, causes of breaking seals

** A field visit may be planned to explain and show the relevant things.