Environmental Engineering Multiple Choice Questions on “Conservancy System”.
1. Which system of collection of sewage is a dry system?
a) Conservancy system
b) Biological digestion
c) Incernation
d) Water carriage system
Answer: a
Clarification: The conservancy system is a dry and old system where sewage is deposited in the pit and then removed periodically after 24 hours.
2. After how many years, night soil gives good quality manure?
a) 1
b) 5
c) 10
d) 14
Answer: a
Clarification: Night soil is buried into the ground or trenches to give good quality manure in 1 or 2 years.
3. Hog feeding is a type of ______
a) Campaign
b) Food
c) Garbage disposal method
d) Disease
Answer: c
Clarification: Hog feeding is a type of garbage disposal method where hog eats the garbage. However, this method is opposed by health official as the place where hogs are kept smelling very bad.
4. Conservancy system is a highly unhygienic system, causing insanitary conditions.
a) True
b) False
Answer: a
Clarification: In conservancy system, the excreta starts decomposing within the few hours of its production, produce bad smell and give rise to fly nuisance.
5. Which of the following is not correct regarding conservancy system?
a) High maintenance cost
b) Highly unhygienic system
c) Independent of labour
d) Chances of epidemic
Answer: c
Clarification: This system is highly dependent on labour. Absence of Labour even for a day will cause a foul smell in the whole area.
6. Which system of collection of sewage is called a dry system?
a) Conservancy system
b) Biological digestion
c) Incernation
d) Water carriage system
Answer: a
Clarification: The conservancy system is an old method of collection of sewage where instead of water; humans are responsible for its collection, conveyance and disposal.
7. ________ is a method where water is used as a medium for the flow of sewage from its production of the treatment unit.
a) Conservancy system
b) Biological digestion
c) Incernation
d) Water carriage system
Answer: d
Clarification: In water carriage system, the collection, conveyance and disposal of various types of wastes are carried out with the help of water.
8. Normally, the amount of water required for flushing operation is _____ litres.
a) 10-20
b) 5-10
c) 15-20
d) 20-30
Answer: b
Clarification: In water carriage system, water closets are used where human excreta is removed by the flushing 5-10 litres of water by each person.
9. The water carriage system is a hygienic system without any bad smell.
a) True
b) False
Answer: a
Clarification: Water carriage system is very hygienic as the night soil and other waste water is conveyed through close conduits which are not directly exposed to the atmosphere.
10. Which of the following is correct regarding water carriage system?
a) Chances of the epidemic is there
b) Foul smell is produced
c) Does not cause pollution
d) Highly dependent on labours
Answer: c
Clarification: The liquid waste in the water carriage system is directly conveyed through the sewer, so there is no chance of the waste being soaked into the ground or contaminating the soil.