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Water Supply, Treatment and Quality
Practice Questions

20 CXC CSEC Integrated Science questions on Water Supply, Treatment and Quality, each with instant feedback and a full examiner-style mark scheme.

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✨ Revision guide includes key terms, worked examples and exam technique for Water Supply, Treatment and Quality.

Try 2 sample questions on Water Supply, Treatment and Quality

Question 1 · 1 mark · Difficulty 1/3

The Water and Sewerage Authority (WASA) in Trinidad collects water from the Caroni River and processes it before distribution. Which of the following is the PRIMARY purpose of adding chlorine during water treatment?

  1. To remove suspended particles from the water
  2. To kill harmful microorganisms in the water
  3. To improve the taste of the water
  4. To soften hard water
Show answer & explanation
✓ Answer: B — To kill harmful microorganisms in the water
Award 1 mark for identifying disinfection as the primary purpose of chlorination. A is incorrect — removal of suspended particles is achieved through sedimentation and filtration. C is incorrect — chlorine can actually give water an unpleasant taste. D is incorrect — water softening requires ion exchange or addition of washing soda, not chlorine.
Question 2 · 1 mark · Difficulty 2/3

A community in rural Jamaica relies on rainwater harvesting for their water supply. During the dry season, the stored water develops an unpleasant odour and green colour. What is the MOST likely cause of this change?

  1. Rusting of the storage tank
  2. Growth of algae in the water
  3. Evaporation of the water
  4. Increase in dissolved oxygen
Show answer & explanation
✓ Answer: B — Growth of algae in the water
Award 1 mark for identifying algal growth as the cause. The green colour and odour are characteristic of algal bloom, which occurs when water is stored in light and contains nutrients. A is incorrect — rust would cause a brown/orange colour, not green. C is incorrect — evaporation would concentrate minerals but not cause green colour. D is incorrect — increased oxygen would not cause these symptoms.
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20 questions · 25 min · free

CXC CSEC Integrated Science: Water Supply, Treatment and Quality FAQ

How many CXC CSEC Integrated Science questions on Water Supply, Treatment and Quality are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Water Supply, Treatment and Quality for CXC CSEC Integrated Science, with new questions added every week. Each question gives you instant feedback and a full examiner-style mark scheme that tells you exactly what would earn marks on a real CXC paper. The questions span the full difficulty range — from straightforward recall (level 1) right up to multi-step reasoning and evaluation (level 3) — so the bank works for first-pass revision and final exam-week stress testing alike.
Is Kramizo free for CXC CSEC students preparing for Integrated Science?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix Water Supply, Treatment and Quality practice with other Integrated Science topics or even switch to a totally different CXC subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the Water Supply, Treatment and Quality questions aligned to the official CXC CSEC Integrated Science syllabus?
Every question is written against the published CXC CSEC Integrated Science specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CXC paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from CXC.
How is Water Supply, Treatment and Quality typically tested on CXC CSEC Integrated Science papers?
Water Supply, Treatment and Quality appears across multiple question types on real CXC CSEC Integrated Science papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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