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- Question
Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for
Options- A. conversion of CO into CO2 in the second compartment.
- B. conversion of NOx into N2 and NH3 in the first compartment.
- C. oxidation of unburnt hydrocarbon fuel in the second compartment.
- D. all (a), (b) and (c).
- Correct Answer
- all (a), (b) and (c).
- 1. Pick out the correct statement.
Options- A. Noise from ball mills can be dealt with by fibre glass lined enclosures.
- B. Noise from vibrating chutes can be reduced by lining the metallic chute with rubber.
- C. Noise of conveyor belt system is reduced by using urethane coated cloth conveyor belts and rubber/plastic covered metallic rollers.
- D. all (a), (b) & (c). Discuss
- 2. World environment day is observed every year on the 5th of
Options- A. June
- B. December
- C. July
- D. September Discuss
- 3. Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the
Options- A. forestation
- B. rain
- C. green house effect
- D. vegetation Discuss
- 4. On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because
Options- A. of clotting of blood.
- B. of jamming of respiratory tract.
- C. it forms carboxyhaemoglobin by combining with haemoglobin of blood, thereby making it incapable of absorbing oxygen.
- D. it forms CO2 by combining with oxygen present in the blood. Discuss
- 5. Higher concentration of nitrogen dioxide in atmospheric air causes
Options- A. cancer
- B. bronchitis
- C. asphyxiation
- D. corrosion Discuss
- 6. Presence of a certain minimum quantity of flourine is desirable in potable water to prevent
Options- A. dental cavities
- B. scale formation
- C. water-borne disease
- D. corrosion Discuss
- 7. Pollution by particulate matter emission in the atmosphere does not take place during metal
Options- A. grinding
- B. machining
- C. cutting
- D. polishing Discuss
- 8. BOD of raw municipal sewage may be in the range of about __________ mg/litre.
Options- A. 1-2
- B. 5-10
- C. 150-300
- D. 2000-3000 Discuss
- 9. Which of the following is a green house gas other than CO2?
Options- A. Methane
- B. Nitrous oxide
- C. Chlorofluro carbons (CFC)
- D. All (a), (b) and (c) Discuss
- 10. Septic tanks are used for the __________ of the deposited solids.
Options- A. separation
- B. anaerobic decomposition
- C. aerobic decomposition
- D. none of these Discuss
Environmental Engineering problems
Search Results
Correct Answer: all (a), (b) & (c).
Correct Answer: June
Correct Answer: green house effect
Correct Answer: it forms carboxyhaemoglobin by combining with haemoglobin of blood, thereby making it incapable of absorbing oxygen.
Correct Answer: bronchitis
Correct Answer: dental cavities
Correct Answer: polishing
Correct Answer: 150-300
Correct Answer: All (a), (b) and (c)
Correct Answer: anaerobic decomposition
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