- 1(current)
Q. No.Consider the following statement (a-d) each with one or two blanks.
a. All solids that settle during primary treatment of sewage forms____(i)____ and supernatant forms the ____(ii)___.
b. Secondary treatment of sewage is also known as ___(iii)___ treatment.
c. A small part of the activated sludge is pumped back into the aeration tank to serve as the ___(iv)_____.
d. The sewage water is treated till ____(v)_____ is reduced.
Which of the following option given the correct fill ups for the respective blank numbers from (i) to (v) in the statements?
1. (i) Primary sludge (iii) Flocs (v) Do
2. (ii) Effluent (iii) Biological (iv) Inoculum (v) BOD
3. (i) Primary sludge (iii) Flocs ( iv) Inoculm (v) DO
4. (i) Effluent (ii) Primary sludge (iii) Flocs (v) BOD
Reason(R): This treatment makes sewage less polluting.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
- 1(current)
Q. No.
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