ENVIRONMENTAL ENGINEERING LAB QUESTIONS - INDIRECT QUESTIONS

1.       

a.       Three samples are given to you. You have to determine the hydrogen ion concentration and express the values as a standard parameter. This has to be done by two different methods and values have to be compared. Give your comments about the samples whether it is as per IS 10500 – 1991 for this particular parameter. Write aim, apparatus/reagent, procedure, observation table, calculations, result, environmental significance and inference.

b.      How can you find out the optimum dose of alum to be added to remove turbidity of a water body? Write the aim, apparatus, procedure and environmental significance. Diagrammatically represent the expected behaviour of various doses on alum on the turbidity of the water.

2.      Determine the acid neutralizing capacity of the given sample of solution. Express it as per standard unit. Does the sample fit the standard for this parameter given by Indian Standards? Give your comments. Write aim, apparatus/reagent, procedure, observation table, calculations, result, environmental significance and inference.

3. A sample is given to you which is referred to have a problem of not producing lather with soap. You have to conduct an experiment to prove the validity of this statement and give your comments. Write aim, apparatus/reagent, procedure, observation table, calculations, result, environmental significance and inference.

4.    A sample of water is found to have a salty taste due to presence of common salt. Determine its concentration in the solution. Is this concentration allowable as per IS 10500 – 1991? Write aim, apparatus/reagent, procedure, observation table, calculations, result, environmental significance and inference

5.  A water body was found to have fishes dead in a particular area. It was found that a industry is disposing waste in this area with high BOD. What parameter would be low/high to cause this issue? Determine the concentration of this particular parameter? Does it come in the limit required in any water body? Write aim, apparatus/reagent, procedure, observation table, calculations, result, environmental significance and inference. 

6. Anaerobic reaction of organic material generates various gases out of which one has rotten egg smell. Which gas is it? How can you determine if given sample has same anion of this gas? Does the concentration of the same exceed the Indian standard limits? Write aim, apparatus/reagent, procedure, observation table, calculations, result, environmental significance and inference. 

7.  Three samples are given to you. You have to determine the hydrogen ion concentration and express the values as a standard parameter. This has to be done by two different methods and values have to be compared. Give your comments about the samples whether it is as per IS 10500 – 1991 for this particular parameter.

b.      When solids are mixed with water, it will exist in the solution in different forms. Write the aim, apparatus/ equipments and procedure to find the three main classes of solids in water. Write the environmental significance and your inference about the sample.