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- Question
Pick out the wrong statement.
Options- A. Biological oxygen demand (B.O.D.) value of a sewerage sample is always lower than its chemical oxygen demand (C.O.D.) value.
- B. Environmental pollution by NOx emission is much higher by four stroke petrol engines as compared to the two stroke engines.
- C. Temperature in stratosphere rises with increasing altitude.
- D. The characteristic of a green house body is that it allows the long wavelength incoming solar radiation to come in but does not allow the short wavelength infra red radiation to escape out of the earth's atmosphere.
- Correct Answer
- The characteristic of a green house body is that it allows the long wavelength incoming solar radiation to come in but does not allow the short wavelength infra red radiation to escape out of the earth's atmosphere.
- 1. Which of the following is not a secondary air pollutant?
Options- A. Ozone
- B. Photochemical smog
- C. Sulphur dioxide
- D. All (a), (b) & (c) Discuss
- 2. Maximum permissible turbidity in potable water is __________ ppm.
Options- A. 1
- B. 10
- C. 250
- D. 1000 Discuss
- 3. Which of the following radioactive wastes emits all ?, ? & ? rays and hence is the most hazardous of all radioactive emitters?
Options- A. I-131
- B. Sr-90
- C. Au-198
- D. Ra-226 Discuss
- 4. The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.
Options- A. decreases.
- B. increases.
- C. remains constant.
- D. may increase or decrease ; depends on the chemical characteristics of polluted water. Discuss
- 5. Which of the following pollutants, if present in atmosphere is detectable by its odour?
Options- A. CO
- B. SO2
- C. NO2
- D. CO2 Discuss
- 6. __________ can not control the noise pollution.
Options- A. Use of silencers
- B. Green house gases
- C. Vibration damping
- D. Tree plantation Discuss
- 7. Atmospheric pollution caused by the exhaust gas of supresonic transport air-crafts is mostly in the atmospheric region called
Options- A. thermosphere
- B. stratosphere
- C. troposphere
- D. mesosphere Discuss
- 8. Pick out the wrong statement.
Options- A. Catalytic converter is fitted in automobiles to reduce carbon monoxide concentration in exhaust emissions.
- B. Inhalation of pollutant carbon monoxide results in death by asphyxiation.
- C. Sulphur dioxide is the main pollutant emitted from the exhaust of petrol driven automobiles.
- D. Decomposition of plants containing chlorophyll is a natural source of carbon monoxide in atmosphere. Discuss
- 9. Exposure to chemicals having carcinogenic properties cause
Options- A. dermatitis (skin disorder)
- B. cancer
- C. asphyxiation
- D. asthma Discuss
- 10. Presence of volatile compounds like gasoline, oil, alcohol, ether etc. in municipal sewers may cause
Options- A. explosion
- B. non biodegradable foam
- C. undesirable plant growth
- D. corrosion Discuss
Environmental Engineering problems
Search Results
Correct Answer: Sulphur dioxide
Correct Answer: 10
Correct Answer: Ra-226
Correct Answer: decreases.
Correct Answer: SO2
Correct Answer: Green house gases
Correct Answer: stratosphere
Correct Answer: Sulphur dioxide is the main pollutant emitted from the exhaust of petrol driven automobiles.
Correct Answer: cancer
Correct Answer: explosion
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