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Wastewater Story: Practice 001

Core Ideas

Question 1mcq
Which is a common source of domestic wastewater?
A.Water from bathrooms and kitchens
B.Clean rain falling on a forest
C.Light reflected from a mirror
D.A dry pencil box
Question 2mcq
Which pollutant is likely in wastewater from a kitchen sink?
A.Pollen grains only
B.Oil and food particles
C.Clean oxygen gas only
D.Convex lenses
Question 3mcq
Why should wastewater not be released untreated into rivers?
A.It makes rivers flow upward.
B.It always becomes drinking water instantly.
C.It can pollute water and spread disease.
D.It increases dissolved oxygen in every case.
Question 4mcq
A student says clear wastewater is always safe. What is the correction?
A.Only coloured water can contain germs.
B.Clear water cannot contain chemicals.
C.All wastewater is pure if it has no smell.
D.Clear water may still contain dissolved pollutants or microbes.
Question 5mcq
Which observation suggests water pollution?
A.Bad smell and floating waste near a drain outlet
B.A rainbow after rain
C.A plane mirror image
D.A dry leaf on a path only

Try These Situations

Question 6mcq
What is the purpose of a sewerage system?
A.To make light split into colours
B.To carry sewage safely to treatment facilities
C.To reflect images in homes
D.To pump groundwater without pipes.
Question 7mcq
Why should stormwater drains and sewage drains be managed carefully?
A.They are only decorative lines on roads.
B.They carry no water during rain.
C.Mixing and blockage can cause flooding and contamination.
D.They are used only for electric current.
Question 8mcq
A manhole is opened only by trained workers. Why?
A.Manholes are mirrors that break easily.
B.Sewers contain only clean oxygen.
C.Opening them always produces rain.
D.Sewers can contain poisonous gases and unsafe conditions.
Question 9mcq
Which path correctly shows domestic sewage movement?
A.House drain ightarrow ightarrow sewer pipe ightarrow ightarrow treatment plant
B.Treatment plant ightarrow ightarrow bedroom ightarrow ightarrow mirror
C.Forest canopy ightarrow ightarrow convex lens ightarrow ightarrow drain
D.Cloud ightarrow ightarrow switch ightarrow ightarrow cell
Question 10mcq
Why are covered drains safer than open sewage drains?
A.They make sewage disappear without treatment.
B.They reduce contact with sewage and breeding of disease carriers.
C.They turn sewage into drinking water instantly.
D.They increase direct exposure to waste.