Question

Electrostatic precipitators (ESP) are used to control
A. Pesticide pollution
B. Air Pollution
C. Radioactive pollution
D. Water pollution

Answer 1

Hint:- An electrostatic precipitator is a sort of cleaner that uses static electricity until the smokestacks go out to remove soot and ash from exhaust fumes. Using electrical energy to charge particles either positively or negatively it eliminates particles from a gas stream. Then the charged particles are drawn to collector plates that bear the opposite charge. The particles collected can be removed as dry material from the collector plates.

Complete answer:
Fossil fuels such as coal or oil are burned by most power stations to produce energy for use. Smoke is created when these fuels undergo combustion. Smoke consists of tiny soot particles that are suspended in hot, rising air. Through using static electricity in the precipitators, these unburned carbon particles are pulled out of the smoke, leaving clean, hot air to escape from the smokestacks. It is important to eliminate this unreacted carbon from the smoke, as it can destroy buildings and injure human beings.
This one common air pollution control device.It is fairly easy to operate electrostatic precipitators. Two electrodes pass through the toxic flue gas that escapes through the smokestack. The nature these electrodes take depends on the type of electrostatic precipitator used, but inside a pipe or the smokestack itself, they may be metal wires, bars, or plates. A strong negative voltage is charged to one of the electrodes, and this plate allows particles within the smoke to receive a negative charge when they pass through this electrode.While most electrostatic precipitators operate in a similar way, with different sized particles, different smoke concentrations, and varying levels of emissions, there are many variations and different types that work better. The need for a number of designs stems partly from the fact that coal burned across the globe differs dramatically in its chemical composition.
Hence, the correct answer is (b) Air Pollution.

Note:- The efficacy of a certain precipitator is determined by how well the particular system deals with the specific characteristics and issues of the plant at which it is used. In addition, the temperature and moisture content of the flue gas is also determined by precipitator efficacy.