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Environmental Engineering Practice Test: Quality of Water
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Avg score: 82% • Most missed: “The permissible limit of turbidity of domestic water is ____ ppm.”
Water quality is based on its physical, chemical, and biological characteristics. Water quality parameters are indicators used to evaluate the suitability and safety of water. These parameters include: Temperature, pH, Dissolved oxygen, Turbidity, Conductivity, Presence of pollutants.  Physical parameters include: Color, Taste, Odor, Temperature, Turbidity, Solids, Electrical conductivity.  Water quality problems are divided into two main categories: Natural or “conventional” pollution Modern or industrial/technological pollution  Water quality criteria include: pH between 6.5 to... Show more
Environmental Engineering Practice Test: Quality of Water
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25 Questions

1. One degree of hardness is equivalent to ___ ppm.
2. In which method of determining total hardness of water is based on the premise that hardness producing substance react with soap and form insoluble compounds before lather is produced?
3. 1 TCU (True Color Unit) is equivalent to _____
4. Which of the following statement is/are correct regarding coliform bacteria?

i. It is gram negative

ii. It is rod shaped bacteria

iii. It is a harmless aerobic microorganism
5. If the PO value is 6, what does it imply?
6. Which of the following statement is wrong regarding turbidity?
7. The range of temperature of water that is required to do the temperature test is __________
8. The number of bacterial colonies by Agar plate count test should not exceed ____ per ml for potable water.
9. Suspended solids are measured by which of the following?
10. Which of the following is the disease caused by bacterial infections?
11. Which method is used to measure the color of water?
12. Which bacteria cause the reddish brown deposits in the tank?
13. Carbonate hardness can be removed by adding lime to water.
14. What is the temperature at which MPN test is performed?
15. The maximum permissible limit for suspended solids is ____________
16. The permissible limit of turbidity of domestic water is ____ ppm.
17. Which type of bacteria has a rod shaped structure?
18. The permissible limit of pH preferred for potable water is ___ ppm.
19. Gelatin liquefying bacteria are helpful in the manufacturing of photographic films.
20. What is the concentration of H+ ions in moles/L in water if the pOH value is 6?
21. ________ represents the bacterial density that is most likely to be present in water.
22. Which bacteria results in the corrosion of iron and steel pipes embedded in soil?
23. Chlorides are estimated by titration with a standard silver nitrate solution by using _______ as an indicator.
24. The size of suspended solids lies in the range of ________
25. Identify the correct relation between the following?

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