Environmental Engineering problems
- 1. Which is the best and the most effective method for the removal of organic contaminant present in the polluted water in very small quantity (say < 200 mg/litre)?
Options- A. Lagooning
- B. Activated carbon adsorption
- C. Biological oxidation pond
- D. Chemical coagulation Discuss
Correct Answer: Activated carbon adsorption
- 2. Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by
Options- A. biological oxygen pond.
- B. radial settling tank (thickener) using coagulant (lime & ferrous sulphate).
- C. lagoons.
- D. filtration. Discuss
Correct Answer: radial settling tank (thickener) using coagulant (lime & ferrous sulphate).
- 3. Presence of excess flourine in water causes
Options- A. dental cavity
- B. tooth decay
- C. fluorosis
- D. respiratory disease Discuss
Correct Answer: fluorosis
- 4. The widest explosive limit is of __________ , thereby making it the most explosive gas.
Options- A. acetylene
- B. petrol vapor
- C. hydrogen
- D. carbon monoxide Discuss
Correct Answer: acetylene
- 5. Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes
Options- A. blood poisoning.
- B. anaemia.
- C. nervous system disorder.
- D. all (a), (b) & (c). Discuss
Correct Answer: all (a), (b) & (c).
- 6. During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum?
Options- A. Idle running
- B. Acceleration
- C. Cruising
- D. Deaccelaration Discuss
Correct Answer: Idle running
- 7. Phenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/litre can be removed by
Options- A. chlorination
- B. treating in biological oxygen pond
- C. chemical coagulation
- D. none of these Discuss
Correct Answer: treating in biological oxygen pond
- 8. Which of the following pollutants is not emitted during volcanic eruptions?
Options- A. SO2
- B. H2S
- C. CO
- D. hydrocarbons Discuss
Correct Answer: hydrocarbons
- 9. Exposure to small amount of __________ results in high blood pressure & heart disease in human beings.
Options- A. hydrogen sulphide
- B. mercury
- C. cadmium
- D. asbestos Discuss
Correct Answer: cadmium
- 10. Exposure to chemicals having carcinogenic properties cause
Options- A. dermatitis (skin disorder)
- B. cancer
- C. asphyxiation (suffocation)
- D. asthma Discuss
Correct Answer: cancer
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