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State and explain principal, construction and working of flat plate collector used for solar energy.
Concept: Principle and working with schematic diagram of Solar Energy
Write a note on: Green Buildings – Concept and objectives.
Concept: Concept of Green Buildings
Distinguish between alkaline and non alkaline hardness?
Concept: Hardness of Water
6ml of waste water was refluxed with 25ml ofK2Cr2 O7 solution and after refluxing the excess unreacted dichromate required 20ml of 0. 1 N FAS solution. A blank of distilled water on refluxing with 25 ml of K2Cr2O7 solution required 35ml of 0. 1 N FAS solution . Calculate the COD of the waste water sample.
Concept: COD- Definition and Significance
The hardness of 85000 litres of water sample was removed by passing it through a zeolite softener. The zeolite required 2000 litres of NaCl solution containing 190 mg/lit of NaCl for regeneration. calculate the hardness of sample.
Concept: Zeolite process and numerical problems
How is activated sludge process carried out for the treatment of waste water? Explain with flow sheet diagram.
Concept: Sewage Treatment
What are the advantages of ion exchange process?
Concept: Ion Exchange Process and Numerical Problems
A 1Oml of sample of water was refluxed with 20ml potassium dichromate solution and after refluxing the excess unreacted dichromate required 26.2ml of 0. 1M FAS solution. A blank 1Oml of distilled water on refluxing with 20ml of dichromate solution required 36ml of 0. 1M FAS solution. Calculate the COD of waste water .
Concept: COD- Definition and Significance
Calculate the amount of lime (85% pure) and soda (95% pure) required to soften one million litre of water which contains CaCO3 = 12. 5ppml MgCO3 = 8.4ppml
CaCl2 = 22.2ppml , MgCl2 = 9.5ppml C02 = 33ppml HCI = Z3ppml organic matter= 16.Bppm
Concept: Softening of water by Hot and Cold lime Soda method and numerical problems
What are cation and anion exchangers?
Concept: Ion Exchange Process and Numerical Problems
A 10ml of sample of waste water was refluxed with 20ml of potassium dichromate solution and after refluxing the excess unreacted dichromate required 36.2ml of 0. 1M FAS solution. A blank of 1Om/ of distilled water on refluxing with 20ml of dichromate solution required 46ml of 0. 1M FAS solution. Calculate the COD value of waste water.
Concept: COD- Definition and Significance
Explain the zeolite method for softening of water giving suitable diagram and reactions. What are the limitations of this method.
Concept: Zeolite process and numerical problems
Calculate the amount of lime {80 %purity) and soda {90% purity) required for softening of 50,000 of hard water whose chemical analysis results are given below. Ca(HCO3 ) = 40.5 mg/L, Mg( HCO3)2 = 73.0 mg/L, MgSO4 = 60.0 mg/L, CaSO4 = 34.0 mg/L, CaCl2 = 27.5 mg/L and NaCI = 20.0 mg/L.
Concept: Softening of water by Hot and Cold lime Soda method and numerical problems
Ten thousand litres of hard water was made soft with zeolite. The exhausted zeolite required a total amount of 8 lit of NaCl solution containing 150 gm per litre for regeneration. Calculate the hardness of water.
Concept: Hardness of Water
Explain lon-exchange process for Softening of hard water. What are its advantages and disadvantages.
Concept: Ion Exchange Process and Numerical Problems
Write a note on Deccay of Concrete.
Concept: Softening of water by Hot and Cold lime Soda method and numerical problems
15000 litres of hard water was passed through a zeolite softener. The exhausted zeolite required 120 litres of NaCI having stream of 30g/l of NaCL Calculate the hardness of water.
Concept: Hardness of Water
What is activated sludge? How is the process carried out for treatment of waste water? Explain with a flow sheet diagram.
Concept: Sewage Treatment
Write a note on Ultrafiltration method for purification of water.
Concept: Hardness of Water
Distinguish between temporary and permanent hardness of water.
Concept: Hardness of Water
