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Consider the following statements regarding electrostatic precipitator. 1. An electrostatic precipitator can remove over 60 per cent particulate matter present in the exhaust from a thermal power plant.  2. It has electrode wires that are maintained at several thousand volts, which produce a corona that releases electrons. Which of the statement given above is/are correct?
The high-efficiency electrostatic precipitator has higher collection efficiency, for the collection of coarse particles, than the high energy venturi scrubber.
Which of the following equations represents the collection efficiency of the electrostatic precipitator?
Venturi scrubbers have the least efficiency of collection for superfine dust. What is this approximate collection efficiency?
The maximum efficiency of the electrostatic precipitator is ___________
To obtain high efficiency for high capacities, how is the electrostatic precipitator used?
Which particles does the electrostatic precipitator collect with the highest efficiency?
Which one of the following sets is incorrect to show the inter-relationships among price elasticity coefficient, change in price and change in total revenue ? Price elasticity coefficient Change in price Change in Total Revenue 1) Zero Increase Decrease Increase Decrease (2) Less than 1 Increase Decrease Decrease Increase (3) Equal to 1 Increase Decrease No change No change (4) More than 1 Increase Decrease Decrease Increase  
Engines are rated at specified conditions. Then which of the following statements are correct? 1. Power developed increases as local temperature increases. 2. Power developed increases as local temperature decreases 3. Power developed is not dependent on local temperature. 4. Power developed increases as local atmospheric pressure increases. 5. Power developed increases as local atmospheric pressure decreases.
A parallel plate precipitator is used for removing dust from paper mills. It has 8 channels, with each plate being 3 m long and 3 m high. What is its efficiency, if it handles 15000 cubic metres per hour of gases?