Environmental Engineering problems
- 1. The lowest layer of atmosphere is known as the
Options- A. stratosphere
- B. troposphere
- C. ionosphere
- D. none of these Discuss
Correct Answer: troposphere
- 2. The progressive warming up of the earth's surface is mainly due to the
Options- A. automobile exhaust.
- B. blanketing effect of CO2 in the atmosphere.
- C. de-forestation.
- D. thickening of ozone layer. Discuss
Correct Answer: blanketing effect of CO2 in the atmosphere.
- 3. Color test of water is done with an instrument called
Options- A. tintometer
- B. colorimeter
- C. electro-chemical cell
- D. turbidimeter Discuss
Correct Answer: tintometer
- 4. Which of the following causes death by asphyxiation, if its presence in atmospheric air exceeds maximum allowable concentration (i.e. > 50 ppm)?
Options- A. Benzopyrene
- B. Peroxyacyl nitrate
- C. Carbon monoxide
- D. Sulphur dioxide Discuss
Correct Answer: Carbon monoxide
- 5. The biological decomposition of organic substances in wastes controlled conditions is called
Options- A. incineration
- B. biological oxidation
- C. composting
- D. none of these Discuss
Correct Answer: composting
- 6. The permissible color for domestic water supply is __________ ppm.
Options- A. 1
- B. 20
- C. 100
- D. 1000 Discuss
Correct Answer: 20
- 7. In sewage treatment, the detention period allowed for oxidation ponds ranges from __________ weeks.
Options- A. 1 to 2
- B. 4 to 5
- C. 9 to 10
- D. 15 to 20 Discuss
Correct Answer: 4 to 5
- 8. Which of the following is not a source of ozone emission in the atmosphere?
Options- A. Refrigerators.
- B. Xerox machines.
- C. Dermatological photo-therapy equipments.
- D. High voltage electrical equipments. Discuss
Correct Answer: Refrigerators.
- 9. Global warming may result in
Options- A. flood
- B. cyclone
- C. decrease in food productivity
- D. all (a), (b) and (c) Discuss
Correct Answer: all (a), (b) and (c)
- 10. Which of the following is an adsorbant used for the removal of SO2 from gas/air?
Options- A. Bog iron
- B. Limestone powder or alkalised alumina
- C. Silica gel
- D. Active carbon Discuss
Correct Answer: Limestone powder or alkalised alumina
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