High concentrations of accumulated DDT in birds:
1. kills pathogens in their blood
2. causes sterility by affecting gametogenesis
3. leads to premature breaking of eggs
4. causes spasticity of the muscles of the body
What was added in 1987 as a pollutant to The Air (Prevention and Control of Pollution) Act, [originally passed in 1981]?
1. radioactive wastes
2. CFCs
3. ground level ozone
4. noise
Which of the following statements is not true regarding CNG?
1. It is non-polluting
2. It burns more efficiently than petrol and diesel
3. It cannot be siphoned off by thieves
4. It cannot be adulterated
According to CPCB, what particulate size is most harmful to humans:
1. more than 10 micrometers
2. between 5 to 10 micrometers
3. between 2.5 and 5 micrometers
4. less than 2.5 micrometers
The most effective device to remove particulate matter from polluted air is:
1. electrostatic precipitator
2. cyclonic separator
3. trajectory separator
4. scrubber
The device, normally used to remove gaseous pollutants from polluted air but can remove large particulate matter as well, is:
1. electrostatic precipitator
2. cyclonic separator
3. trajectory separator
4. Scrubber
In an algal bloom, the cause of death of other algae is usually:
1. toxins
2. decreased DO
3. decreased sunlight
4. decreased nutrients
Combustion of solid wastes in the absence of oxygen is known as:
1. | Incineration | 2. | Pyrolysis |
3. | Anaerobiosis | 4. | Burning |
Radiatively active gases do not include:
1. Methane
2. Ammonia
3. Nitrous oxide
4. Chloroflouro carbons
A substance or energy introduced into the environment that has undesired effects, or adversely affects the usefulness of a resource is called:
1. | Pathogen | 2. | Allergen |
3. | Pollutant | 4. | Secondary metabolite |