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
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. |
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. |
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
1. | Kilobase | 2. | Dobson unit |
3. | Decibels | 4. | Decameter |
1. | The amount of some toxic substances of industrial wastewater increases in the organisms at successive trophic levels. |
2. | The micro-organisms involved in biodegradation of organic matter in a sewage-polluted water body consume aquatic organisms. |
3. | Algal blooms caused by excess of organic matter in water improve water quality and promote fisheries. |
4. | Water hyacinth grows abundantly in eutrophic water bodies and lead to an imbalance in the ecosystem dynamics of the water body. |
Given below are two statements:
I: | Electrostatic precipitator is most widely used in a thermal power plant. |
II: | Electrostatic precipitator in a thermal power plant removes ionising radiations. |
1. | Statement I is incorrect but Statement II is correct. |
2. | Both Statement I and Statement II are correct. |
3. | Both Statement I and Statement II are incorrect. |
4. | Statement I is correct but Statement II is incorrect. |