Page 3 - H.A-2 (PRACTICE WORKSHEET)

A) arrange the steps in correct order

B) which step gives most of the sludge which is
used in obtaining biogas

9. a) Define the following:- R & U 2+1
Sewer,
Chemical toilet
b) Write the full form of WWTP.

10 Some of the alternative sewage disposal systems HOTS 5
call human wastes are given below:
Chemical toilet, composit toilet, vacuum toilet,
septic tank toilet, vermi processing toilet
a) which of these toilets are used in airplanes?
b) which of these toilets provide high quality
manure?
c) which of these toilets are used at outdoor
gatherings?
d) which of these toilets are used where water
supply is limited?
e) which of these toilets is most likely to
contaminate water?

3