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Question (21)

QN005653

A leaking tap wastes 12 litres of water per day. How much water is wasted in 30 days?

(A) 240 litres
(B) 300 litres
(C) 360 litres
(D) 420 litres

Correct Answer: C

Explanation:

12 × 30 = 360 litres.

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Question (22)

QN005654

Which human activity directly contributes to water pollution?

(A) Rainwater harvesting
(B) Dumping industrial waste into water sources
(C) Conserving water
(D) Reusing water

Correct Answer: B

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Question (23)

QN005655

In a locality, 750 litres of water are required daily. If only 600 litres are available, what is the shortage?

(A) 100 litres
(B) 150 litres
(C) 200 litres
(D) 250 litres

Correct Answer: B

Explanation:

750 − 600 = 150 litres.

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Question (24)

QN005656

What is the primary purpose of rainwater harvesting?

(A) To increase salinity of water
(B) To conserve water for future use
(C) To generate electricity
(D) To produce oxygen

Correct Answer: B

Explanation:

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Question (25)

QN005657

Which structure stores rainwater and water seeping from nearby lakes, ponds and rivers?

(A) Windmill
(B) Canal
(C) Stepwell
(D) Solar panel

Correct Answer: C

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Question (26)

QN005658

A family reduces its daily water use from 1000 litres to 850 litres. What percentage reduction has been achieved?

(A) 10%
(B) 12%
(C) 15%
(D) 20%

Correct Answer: C

Explanation:

Reduction = 150/1000 × 100 = 15%.

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Question (27)

QN005659

Why should freshwater sources be protected from pollution?

(A) To make water salty
(B) To ensure water remains fit for consumption
(C) To increase evaporation
(D) To reduce rainfall

Correct Answer: B

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Question (28)

QN005660

World Water Day is observed every year on:

(A) 5 June
(B) 22 March
(C) 15 August
(D) 26 January

Correct Answer: B

Explanation:

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Question (29)

QN005661

If 1/4 of a water tank containing 1200 litres is emptied, how much water remains?

(A) 300 litres
(B) 600 litres
(C) 900 litres
(D) 1000 litres

Correct Answer: C

Explanation:

Water removed = 300 litres, remaining = 900 litres.

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Question (30)

QN005662

Which statement best defines rainwater harvesting?

(A) Collecting and storing rainwater for later use
(B) Purifying seawater for drinking
(C) Transporting river water through canals
(D) Measuring annual rainfall

Correct Answer: A

Explanation:

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Question (21)

A leaking tap wastes 12 litres of water per day. How much water is wasted in 30 days?

Explanation:

Link:

Question (22)

Which human activity directly contributes to water pollution?

Explanation:

Link:

Question (23)

In a locality, 750 litres of water are required daily. If only 600 litres are available, what is the shortage?

Explanation:

Link:

Question (24)

What is the primary purpose of rainwater harvesting?

Explanation:

Link:

Question (25)

Which structure stores rainwater and water seeping from nearby lakes, ponds and rivers?

Explanation:

Link:

Question (26)

A family reduces its daily water use from 1000 litres to 850 litres. What percentage reduction has been achieved?

Explanation:

Link:

Question (27)

Why should freshwater sources be protected from pollution?

Explanation:

Link:

Question (28)

World Water Day is observed every year on:

Explanation:

Link:

Question (29)

If 1/4 of a water tank containing 1200 litres is emptied, how much water remains?

Explanation:

Link:

Question (30)

Which statement best defines rainwater harvesting?

Explanation:

Link:

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