Page 2 - 4. HOME ASSIGNMENT
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SUBJECTIVE


                 Sl.                              Questions                                Mark        Skill
                 No.
                 Q.1                                                                       1           R
                        Name the gas which is used in the secondary treatment of
                       wastewater.
                 Q.2         For Assertion& Reason question follow the following          01          u
                              directions.
                       DIRECTION: Each of these questions contains an Assertion
                       followed by Reason. Read them carefully and answer the
                       question on the basis of following options. You have to select
                       the one that best describes the two statements.

                       (a) If both Assertion and Reason are correct and Reason is
                       the correct explanation of Assertion.

                       (b) If both Assertion and Reason are correct, but Reason is
                       not the correct explanation of Assertion.

                       (c) If Assertion is correct but Reason is incorrect.
                       (d) If Assertion is incorrect but Reason is correct.

                       (e) If Assertion & Reason both are incorrect
                       Assertion-  The untreated water is released into rivers and
                       seas.

                       Reasoning- Wastewater may go through several treatment
                       planets to purify it.


                 Q.3                                                                       1           U
                       In which stage of water treatment is sewage treated with
                       useful bacteria?

                 Q.4   a) Mention two uses of sludge.                                      3           U
                       b) Why chlorine is added to the swimming pools?
                 Q5.       a)  Describe the process which is carried out in the            2+3         R
                              tertiary chamber.
                           b)  Mention briefly three types of sewer.



























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