Question

2.
(a)
Which of the following is waste water?
(a) Water trickling from a damaged tap.
(b) Water coming out of a shower.
(c) Water flowing in a river.
(d) Water coming out of a laundry.
Sewage is mainly a
liquid waste.
(b) solid waste.
(c) gaseous waste.
mixture of solid and gas.
Which of the following is/are products of wastewater
treatment?
(a) Biogas
(b) Sludge
Both biogas and sludge
(d) Aerator
3.
4.
Open drain system is a breeding place for which of the
following
(a) Flies
(b) Mosquitoes
(c) Organisms which cause diseases
(d) All of these
BOL De regelinlished
5.
Water polluted by various human activities causes a number
of water borne diseases. Which of the following is not a water
borne disease?
(a) Cholera
(b) Typhoid
(c) Asthma
(d) Dysentry ​

Answer 1

Answer:

sludge

is the right answer