Dobson units are used to measure thickness of:
1. Ozone
2. Troposphere
3. CFCs
4. Stratosphere
According to the Central Pollution Control Board [CPCB] what size (in diameter) of particulate is responsible for causing greater harm to human health?
1. 3.5 micrometers
2. 2.5 micrometers
3. 4.0 micrometers
4. 3.0 micrometers
Air (Prevention and Control of Pollution) Act was amended in 1987 to include among pollutants:
1. Vehicular exhaust
2. Allergy causing pollen
3. Noise
4. Particulates of size 2.5 micrometer or below
A species that was introduced for ornamentation but has become a troublesome weed in India:
1. Parthenium hysterophorus
2. Eichhornia crassipes
3. Prosopis juliflora
4. Trapa Spinosa
The device which can remove particulate matter present in the exhaust from a thermal power plant is :
1. Catalytic Convertor
2. STP
3. Incinerator
4. Electrostatic Precipitator
The entire fleet of buses in Delhi was converted to CNG from diesel. In reference to this, which one of the following statements is false?
1. | It cannot be adulterated like diesel. |
2. | CNG burns more efficiently than diesel. |
3. | The same diesel engine is used in CNG buses making the cost of conversion low. |
4. | It is cheaper than diesel. |
Statement I: | In a scrubber the exhaust from the thermal plant is passed through the electric wires to charge the dust particles. |
Statement II: | Particulate matter (PM 2.5) cannot be removed by scrubber but can be removed by an electrostatic precipitator. |
High dose of UV-B causes inflammation of cornea and is called as:
1. UV -blindness
2. Colour-blindness
3. Evening- blindness
4. Snow- blindness
The thickness of the ozone in a column of air from the ground to the top of the atmosphere is measured in terms of :
1. Dalton units
2. Svedberg units
3. Monomeric units
4. Dobson units
Which biological process leads to a decrease in the fish-eating bird population near a water body containing toxicants from industrial drainage?
1. Algal bloom
2. Biochemical oxygen demand
3. Accelerated Eutrophication
4. Biomagnification