Environmental Chemical Engineering MCQs 2026

5 questions with detailed answers · 4 from past papers · 1 quiz batches available

📚 Chemical Engineering 📄 4 Past-Paper Qs ✓ Free · No Login Needed

Read each question, think about the answer, then click Show Answer to reveal the correct option and explanation. Load 10 at a time so it stays manageable — perfect for one-topic study sessions on the bus or during a break.

Page 1 of 1 Questions 1–10 of 5

Q1 Past Paper · PPSC/FPSC/CSS easy

BOD measures
1. A total metals only
2. B biodegradable organic load by oxygen demand
3. C radioactivity only
4. D noise level
💡 Explanation:
Biological oxygen demand test.
Q2 Past Paper · PPSC/FPSC/CSS easy

COD measures
1. A only pathogens count directly
2. B oxygen demand by chemical oxidation
3. C only turbidity without oxidation
4. D only dissolved O2 saturation only
💡 Explanation:
Chemical oxygen demand.
Q3 Past Paper · PPSC/FPSC/CSS medium

NEQS in Pakistan set limits on
1. A industrial effluent pollutants
2. B aircraft speed
3. C building height only
4. D crop yield only
💡 Explanation:
National Environmental Quality Standards.
Q4 Past Paper · PPSC/FPSC/CSS easy

Wet scrubber removes pollutants by
1. A only electrostatic precipitation dry only
2. B only gravity without contact
3. C contacting gas with liquid
4. D only membrane RO on gas
💡 Explanation:
Absorption/neutralization in liquid.
Q5 medium

Electrostatic precipitator removes
1. A dissolved salts in water only
2. B only CO2 by absorption always here
3. C only BOD
4. D particulates from flue gas
💡 Explanation:
Charged particles collected on plates.

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Environmental Chemical Engineering MCQs 2026

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