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- Question
Which of the following is the most severe air pollutant?
Options- A. hydrocarbons
- B. NOx
- C. SO2
- D. CO
- Correct Answer
- NOx
- 1. A shallow pond in which the sewage is retained and biologically treated is called
Options- A. oxidation
- B. Imhoff tank
- C. lagoon
- D. skimming tank Discuss
- 2. Which of the following variables affects the furnace capacity?
Options- A. Temperature of flue gas.
- B. Thermal conductivity of stock.
- C. Thickness of heating stock.
- D. All (a), (b) and (c). Discuss
- 3. In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the
Options- A. rate of firing and emissivity of flame.
- B. thermal conductivity of the charge & structural materials of furnace.
- C. nature of process ; whether batch, continuous or intermittant.
- D. all (a), (b) and (c) Discuss
- 4. In which of the following furnaces, the gases are sucked through the stock bed from below?
Options- A. Soaking pit
- B. Sintering machine
- C. Beehive oven
- D. None of these Discuss
- 5. Waste heat from the outgoing flue gases in a thermal power plant is recovered by a/an
Options- A. economiser
- B. steam superheater
- C. air preheater
- D. all (a), (b) and (c) Discuss
- 6. Which is the most practical and economical method for removal of suspended solid matter from polluted water?
Options- A. Sedimentation
- B. Skimming off
- C. Chlorination
- D. Biological oxidation Discuss
- 7. Which of the following pollutants, if present in atmosphere is detectable by its odour?
Options- A. CO
- B. SO2
- C. NO2
- D. CO2 Discuss
- 8. 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
- 9. 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
- 10. Maximum permissible turbidity in potable water is __________ ppm.
Options- A. 1
- B. 10
- C. 250
- D. 1000 Discuss
Environmental Engineering problems
Search Results
Correct Answer: oxidation
Correct Answer: All (a), (b) and (c).
Correct Answer: all (a), (b) and (c)
Correct Answer: Sintering machine
Correct Answer: all (a), (b) and (c)
Correct Answer: Sedimentation
Correct Answer: SO2
Correct Answer: decreases.
Correct Answer: Ra-226
Correct Answer: 10
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