Previous year question paper for SST (B-TECH Civil Engineering 6th)

SECTION-A

Unit-I: Collection of sewage

Importance of sanitation, Systems of sewerage - separate, combined and partially separate. Quantity of sanitary

sewage and variations. Shapes of sewer- circular and egg shaped. Design of sewers, self cleansing Velocity and

slopes, Construction and testing of sewer lines. Sewer materials, joints and appurtenances.

Unit –II Sewage collection from houses and buildings, general principal for design of a sanitary plumbing system, Traps

function and types, System of plumbing, testing of house sewer, sanitary fittings and other accessories, ventilation of

house drainage, waste water recycling in building

SECTION-B

Unit – III

Quality parameters- BOD, COD, Solids, D.O., Oil & Grease, tests on quality parameters, Sewage

disposal , type relative advantage and disadvantage of various sewage disposal system Indian,

Standards for disposal effluents into inland surface sources and on land. Bangalore method and Indore

method of sewage disposal. Disposal of sewage by dilution - self-purification of streams. Sewage disposal by

irrigation (Sewage treatment).

Unitv-VI 

Digestion and disposal of primary and secondary sludge – Moisture content, sludge digestion process,,

Factors affecting, sludge digestion tanks, disposal of digested sludge

SECTION-C

Unit-V: Sewage Treatment

Objectives of sewage Treatment, classification of treatment process, Preliminary treatment -screening

and grit removal units. Skimming tanks, Theory and design aspects of sedimentation, coagulation,

merit and demerits of coagulation

 Secondary treatment- Biological Filtration – Trickling Filter, High rate Trickling Filter advantage and

disadvantages, miscellaneous type of filter, Humus tank, activated sludge process & its modifications,

aeration tanks, secondary sedimentation tanks 

Unit VI

Stabilization pond, oxidation pond, Oxidation ditches, aeration lagoons, anaerobic stabilization units -, septic

tank and Inhoff tank. Sludge Digestion UASB process sequence and efficiencies of conventional treatment

units, Process Design of a complete sewage treatment plant, Examples

SECTION-D

Unit VII

Noise Pollution- Definition and introduction, Effect of Noise, characteristics of sound and it’s measurement, level of noise ,

noise rating system and standards, source of noise their levels and controls

Unit VIII

Air pollution –Definition of air pollution, Effects of air pollution, Dispersion of air pollution in atmosphere, Dispersion

models and equations, Air pollution controls