Module A – Water Quality: Concepts
1. The primary source of potable water is:
a) Oceans
b) Rivers
c) Groundwater
d) Lakes
Answer: c) Groundwater
2. Which of the following is NOT a form of water pollution?
a) Chemical contamination
b) Microbial contamination
c) Electromagnetic radiation
d) Heavy metal contamination
Answer: c) Electromagnetic radiation
3. Potable water means water that is:
a) Free from microorganisms
b) Safe to drink
c) Soft and odorless
d) Free of suspended particles
Answer: b) Safe to drink
4. Dissolved oxygen levels are critical for:
a) Human health
b) Aquatic life
c) Water hardness
d) Turbidity measurement
Answer: b) Aquatic life
5. The term BOD stands for:
a) Biological Organic Deposit
b) Biochemical Oxygen Demand
c) Biotic Oxygen Demand
d) Bacterial Oxygen Determination
Answer: b) Biochemical Oxygen Demand
6. Heavy metals in water can cause:
a) Turbidity
b) Chronic health problems
c) Increased pH
d) Algae growth
Answer: b) Chronic health problems
7. Which unit is used for measuring turbidity?
a) ppm
b) NTU
c) mg/L
d) mL
Answer: b) NTU
8. The presence of E. coli in water indicates:
a) Chemical pollution
b) Microbial contamination
c) High turbidity
d) Dissolved oxygen depletion
Answer: b) Microbial contamination
9. Water with high alkalinity typically:
a) Tastes salty
b) Is corrosive
c) Can neutralize acids
d) Has low conductivity
Answer: c) Can neutralize acids
10. Radiological pollution in water is caused by:
a) Uranium decay
b) Excess chlorine
c) High turbidity
d) pH imbalance
Answer: a) Uranium decay
Module B – Water Quality: Parameters
1. The pH range of potable water is:
a) 6.5–8.5
b) 4.0–6.0
c) 8.5–10.0
d) 5.5–6.5
Answer: a) 6.5–8.5
2. High levels of nitrates in water are harmful because:
a) They cause turbidity
b) They can lead to methemoglobinemia
c) They increase water hardness
d) They neutralize pH
Answer: b) They can lead to methemoglobinemia
3. Dissolved oxygen is typically measured in:
a) mg/L
b) NTU
c) mL/L
d) ppm
Answer: a) mg/L
4. Turbidity in water is caused by:
a) Dissolved solids
b) Suspended particles
c) Microbial contamination
d) Chemical pollutants
Answer: b) Suspended particles
5. A high Oxidation-Reduction Potential (ORP) indicates:
a) A lack of microbial contamination
b) High turbidity
c) Presence of reducing agents
d) Alkalinity
Answer: a) A lack of microbial contamination
6. Which parameter measures organic matter in water?
a) pH
b) BOD
c) Chlorine residual
d) Conductivity
Answer: b) BOD
7. Arsenic contamination is primarily found in:
a) Surface water
b) Groundwater
c) Rainwater
d) Glacial water
Answer: b) Groundwater
8. Radiological parameters in water are typically measured by:
a) Geiger counters
b) Spectrophotometers
c) Electrochemical sensors
d) Fluorescent probes
Answer: a) Geiger counters
9. Heavy metals in water are best removed by:
a) Sand filtration
b) Reverse Osmosis
c) Chlorination
d) UV treatment
Answer: b) Reverse Osmosis
10. A high Total Organic Carbon (TOC) indicates:
a) Poor microbial quality
b) High organic content
c) Low oxygen demand
d) High alkalinity
Answer: b) High organic content
I'll continue preparing MCQs for Modules C to F. Let me know if you'd like to pause or make changes!
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