JNTU B.Tech III WATER SUPPLY ENGINEERING Previous Question Paper (May/June - 2019 - R16)

What are the characteristics of protected water supply?

State the uses of intakes and infiltration galleries in water supply.

Differentiate between Temporary and Permanent Hardness.

Highlight the factors affecting the settling of particles in sedimentation tank.

Define Chlorine demand.

Give any five major requirements of disinfectants.

What are service reservoirs?

Enumerate the requirements of a good distribution system.

Why is it essential to control algal growth?

State in what way aeration method contributions as an advanced treatment method.

Along with the prescribed equation, state all the possible methods available for forecasting the future population.

Discuss in detail the procedure involved in estimation of water requirements for any two significant uses.

By means of a neat sketch, explain the stepwise procedure involved in determination of optimum dosage of coagulant.

Compute the dimensions of a continuous flow rectangular settling tank for a population of 75,000 persons with a daily per capita water allowance of 120 litres. Assume the detention period of 4.5 hours.

Discuss about the four types of settling that occur in sedimentation tank.

A coagulation treatment plant with a flow of 0.85 cumec is dosing alum at 24 mg/l. No other chemicals are being added. The raw water suspended solids concentration is 40 mg/l. The effluent suspended solids concentration is measured at 15 mg/l. The sludge content is 1% and specific gravity of sludge is 3.0. What volume of sludge must be disposed off each day?

What are the operational problems encountered in operation of multimedia filters when compared to other type of filters? Explain.

Chlorine usage in the treatment of 40,000 m3/day of water is 7.5 kg/day. The residual chlorine after 10 minutes of contact is 0.35 mg/l. Calculate the dosage of chlorine in mg/l and chlorine demand of the water.

Design a rapid sand filter to treat 10 MLD allowing 0.7% of filtered water for backwashing. Half hour per day is used for backwashing. Assume other necessary data suitably.

Write a detailed note on Orthotolidine – arsenite test.

Explain Hardy Cross method for solving the network by balancing heads of correcting assumed flows. Derive the expressions for the same.

Discuss the steps involved in the design of a distribution system along with the required precautions to be taken for economical design.

A town with a population of 2.0 lakh is to be supplied with water daily at 220 liters per head. Determine the capacity of the reservoir assuming pumping to be at uniform rate and the period of pumping to be from 6am to 6pm. Neglect fire demand. Solve the problem using the analytical method.

Compare the merits and demerits of continuous and intermittent system of water supply. State under what conditions you would recommend the use of these systems.