21.
Approximately...............people in the world lack access to clean, safe water.
A
534 million
B
1 billion
C
783 million
D
2.3 billion
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Approximately...............people in the world lack access to clean, safe water.
534 million
1 billion
783 million
2.3 billion
All toilets have.................main components.
two
three
four
All of them
After flushing the toilet, where does the water and waste go?
into a holding tank
into a sewerage system
both of the above
None
After a toilet is flushed, what must happen to the flush valve?
The flush valve stays in the up position.
The flush valve returns to the down position and covers the drain hole.
The flush valve does not move.
None
Aeration of water during wastewater treatment removes which of these?
Insoluble things
Human waste
Bacteria
Germs
A network of Interconnected sewers in the area, district or town is known as:
Sewerage
Water supply system
Treatment plant
A building enclosing a latrine to provide privacy and protection for users is known as
Super building
Super structure
Framed structure
Why is porcelain a suitable material for the construction of toilets?
Porcelain is a hard material.
Porcelain is a non-porous material.
Porcelain is a hard, non-porous material.
None
Why does the toilet bowl water level stay the same regardless of how much waste is deposited?
There is an overflow safety mechanism.
The water level is maintained by the siphon.
The water will rise and overflow if enough water is added.
None
Who invented the flushing toilet in 1596?
Joseph Bramah
George Jennings
John Harrington
Which year has been declared as the International year of Sanitation by the UnitedNation Organization (UNO)?
2014
2015
2008
Which word means 'any substance that causes an allergic reaction?
ingest
fungicidal
allergen
Which two words mean 'neat?
Unconcentrated, high in strength
Tidy, unconcentrated
High in strength, tidy
Which stream animal is an indicator of poor water quality?
a black fly larva
a caddis fly larva
a May fly larva
a riffle beetle
Which process is used to remove dirt and sand from wastewater?
Aeration
Chlorination
Sedimentation
Flocculation
Which process during wastewater treatment helps in killing germs?
Aeration
Chlorination
Sedimentation
Flocculation
Which part of the toilet allows water to pass from the tank into the bowl?
flush valve
push handle
siphon tube
None
Which organ does Jaundice affect?
Lungs
Heart
Liver
Stomach
Which one of the following, acts like a fuel in driving the body?
Carbohydrates
Vitamin
Fats
Water
Which one of the following is a water borne disease?
Influenza
Small pox
Malaria
Cholera