6. Match group I (Terminology) with group II (Definition/Brief Description) for waste water treatment systems.
   

1. 1. P-4, Q-3, R-1, S-2

   
   
   

   2. P-4, Q-3, R-2, S-1

   
   
   

   3. P-3, Q-4, R-2, S-1

   
   
   

   4. P-1, Q-2, R-3, S-4

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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7. Group I lists estimation methods of some of the water and waste water quality parameters. Group II lists the indicators used in the estimation methods. Match the estimation method (Group I) with the corresponding indicator (Group II).
   

1. 1. P-3, Q-2, R-1, S-4

   
   
   

   2. P-4, Q-2, R-1, S-3

   
   
   

   3. P-4, Q-1, R-2, S-3

   
   
   

   4. P-4, Q-2, R-3, S-1

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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8. Match the following:
   

   Group I	Group II
   (Characteristics of sewage discharged into inland waters)	(Allowable limit, mg/I)
   P BODs	1. 50
   Q COD	2. 30
   R Oil and Grease	3. 20
   S Total Suspended Solids	4. 10
   	5. 5
   	6. 3

   
   Codes:

1. 1. P Q R S
      2 5 4 2

   
   
   

   2. P Q R S
      4 1 6 4

   
   
   

   3. P Q R S
      3 1 4 2

   
   
   

   4. P Q R S
      2 1 6 3

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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9. In a domestic wastewater sample, COD and BOD were measured. Generally which of the following statement is true for their relative magnitude?

1. 1. COD = BOD

   
   
   

   2. COD > BOD

   
   
   

   3. COD < BOD

   
   
   

   4. Nothing can be said

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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10. A Trickling filter is designed to remove

1. 1. Settleable Solids

   
   
   

   2. Colloidal Solids

   
   
   

   3. Dissolved Organic Matter

   
   
   

   4. None of the above

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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