Question

A.
2
.
Tick() the correct options:
The wastewater produced and released by hospitals is
O b
(b) commercial sewage
(a) domestic sewage
(c) industrial sewage
(d) rainwater
The organic impurities present in sewage are
(a) bacteria 0 (b) phosphorus (c) human faeces O (d) nitrates
3. An underground network of interconnected pipes is called
(a) sewage
O (b) sewers O (c) sewerage
(d) sewing
4. Anaerobic bacteria is added in the digester tank to decompose the organic matter to produce
(a) foul smell
0 (b) biogas O (c) sludge O (d) sewage
5. Floating impurities (such as grease) in the sedimentation tank are removed by
(a) screens 0 (b) skimmer O (c) cleaner
6. Which one of the following is an example of low cost onsite sewage disposal system?
O (d) floater
(a) septic tanks O (b) chlorination (c) land fill
o
(d) draining
​

Answer 1

Answer:

a b d c e

Explanation:

hi

Answer 2

Answer:

the organic impurities present in sewsge