Environmental Engineering
If the coli form bacteria is present in a sample of water, then the coli-form test to be conducted is (i) Presumptive coli-form test (ii) Confirmed coli-form test (iii) Completed coli-form test

Both (i) and (iii)
All (i), (ii) and (iii)
Both (i) and (ii)
Only (i)

ANSWER DOWNLOAD EXAMIANS APP

Environmental Engineering
Assertion A: Slow sand filters are more efficient in removal of bacteria than rapid sand filters.Reason R: The sand used in slow sand filters is finer than that in rapid sand filtersSelect your answer based on the coding system given below:

A is false but R is true
Both A and R is true and R is the correct explanation of A
A is true but R is false
Both A and R is true but R is not the correct explanation of A

ANSWER DOWNLOAD EXAMIANS APP