Q. No.Which of the following are commonly used as a bacterial indicator of water pollution?
1.
Coliforms
2.
Shigella
3.
Giardia
4.
Salmonella
Hot wastewater discharged from industries into water bodies:
| 1. | increases the nutrient content of the water body |
| 2. | decreases the BOD of water |
| 3. | is considered a water pollutant |
| 4. | is desirable as cool water is more damaging to aquatic life |
Biomagnification can occur as a result of:
| I: | Persistence |
| II: | Food chain energetics |
| III: | Low or non-existent rate of internal degradation or excretion of the substance |
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II and III |
Eutrophication of lakes would lead to:
1. Decreased biomass of phytoplankton
2. Increased dissolved oxygen levels in water
3. Decreased biodiversity
4. Increase in the aesthetic value of the lake
Identify the incorrect statement regarding the ecological impact of DDT:
| 1. | It is a persistent organic pollutant. |
| 2. | As it is lipophilic, it bioaccumulates especially in predatory birds. |
| 3. | It can be metabolized to non-toxic forms by human beings. |
| 4. | It causes eggshell thinning in predatory birds. |
Arcata Wildlife Sanctuary in Arcata, California is also a/an:
1. innovative sewer management system
2. tiger reserve
3. nuclear waste disposal site
4. ecological hotspot
Identify the incorrectly matched pair:
|
1. |
International Day of Forests |
March 21 |
|
2. |
World Water Day |
March 22 |
|
3. |
Earth Day |
May 22 |
|
4. |
World Environment Day |
June 5 |
Identify the incorrectly matched pair:
|
1. |
World No Tobacco Day |
May 31 |
|
2. |
World Ocean Day |
June 8 |
|
3. |
International Day for the Preservation of the Ozone Layer |
December 16 |
|
4. |
International Day for Preventing the Exploitation of the Environment in War and Armed Conflict |
November 6 |
To be regarded as a sanitary landfill site, all the following conditions must be fulfilled except:
1. Full or partial hydrogeological isolation
2. Refuge should be kept in an open-burning dump
3. Permanent control
4. Planned waste emplacement and covering
Polyblend is:
| 1. | environment-friendly way of disposing of solid wastes |
| 2. | replacement of CFCs in the refrigeration industry |
| 3. | an innovative way of sealing the radioactive wastes |
| 4. | a product that has the potential to effectively deal with plastic wastes |
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