Interview question based on skill :
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Total Questions: 20
1. In biological oxidation process, depending on the organic load, the oxidation takes place ___________
Correct Answer is : 4-8Hours
2. All impurities are oxidised into the _________ and ___________ in the biological oxidation process.
Correct Answer is : Carbondioxide and water
3. The water after removing of sludge in the biological oxidation process is treated with ____________
Correct Answer is : Chlorine
4. Trickling filter method is ___________ than the activated sludge process.
Correct Answer is : Slow
5. The depth of the rectangular circular tanks in the trickling filters method is having the depth of ____________
Correct Answer is : 2m
6. Periodic cleaning is used to _________
Correct Answer is : Increase efficiency
7. In the trickling filter process, the _________ build up and they block the passage.
Correct Answer is : Micro organisms
8. Dried sludge can be used as _________
Correct Answer is : Fertilizer
9. The unpleasant odour of the water is due to presence of the __________
Correct Answer is : Phenols
10. __________ imparts peculiar odour to the water.
Correct Answer is : Detergents
11. Reacting the water with _________ removes the odour due to the phenols.
Correct Answer is : KMnO4
12. The treatment of water with _________ improves the taste of water.
Correct Answer is : Ozone
13. How many methods of removing the radio active impurities are there?
Correct Answer is : 2
14. Rate of oxidation in petroleum oil proceeds _________ at room temperature.
Correct Answer is : Slowly
15. The moisture in the environment ________ the oxidation.
Correct Answer is : Increases
16. The retardation can be done by adding _________
Correct Answer is : Phenyl -β – napthylamine
17. Oxidation in lubricants is ________
Correct Answer is : Undesirable
18. If the oxidation product is soluble then it is desirable for lubricants.
Correct Answer is : FALSE
19. Aniline number is the minimum equilibrium solution temperature for ________ volume of aniline and lubricating oil.
Correct Answer is : Equal
20. Aniline ________ with oil.
Correct Answer is : Miscible
