Recent questions tagged particulate-pollutants

In the design of air pollution control devices, size of the particles that are removed with $50 \%$ efficiency is termed as $\_\_\_\_$.mean sizemode sizecut sizemedian si...

Which ONE of the following options CORRECTLY matches the Criteria Air Pollutants with measurement methods used in Continuous Ambient Air Quality Monitoring Stations (CAAQ...

Standard deviation for the particulate matter (PM) concentrations listed in the table is $\_\_\_\_$ $\mu \mathrm{g} / \mathrm{m}^{3}$ (rounded off to one decimal place).$...

​​​​​Stubble burning results in release of particulate matter, volatile organic compounds, oxides of nitrogen and sulfur, to name a few. A researcher is planning to use a...

​​​​Which option gives the best control strategies for Dioxins and Furans in the flue gas emitted from waste incineration facilities?Avoid burning polystyrene (PS) and po...

A particle dispersoid has $1510$ spherical particles of uniform density. An air purifier is proposed to be used to remove these particles. The diameter specific number of...

An incandescent light bulb operated for two hours per day uses $12.2 \: \text{kWh}$ of energy per month. Burning of one kg of coal generates $2 \: \text{kWh}$ of electric...

The equipment that can be used to control particulate air pollution in an industrial unit is/areElectrostatic precipitatorcyclone separatorGravity settlerIncinerator

A gravity settling chamber of height ' $H$ ' and length ' $L$ ' is designed to control particulate air pollution. In the chamber, the horizontal velocity of air flow is '...

Which of the following is true according to the Central Pollution Control Board $\text{(CPCB)}$, Government of India's notification issued in the year $2009$?$24$ hour av...

The sub index values of $\mathrm{NO}_{2}, \mathrm{SO}_{2}$ and $\mathrm{PM}_{10}$ are $80,80$ and $100$, respectively. According to the National Air Quality Index $\text{...

A boiler in an industry, located where high plume rise is expected, releases flue gas with fine particulate matter. Which one of the following options is most suited and ...

An industry with an effective stack height of $80 \mathrm{~m}$ emits $1200 \mathrm{~g} / \mathrm{h}$ of $\mathrm{CO}$. The windrose plotted using the meteorological data ...

Which of the following isiare the dominant mechanism(s) for the removal of spherical particles with diameter less than $10 \mu \mathrm{m}$ from a gas stream using a fabri...

$\quad \mathrm{PM}_{2.5}$ concentrations in ambient air can be measured usingBeta attenuation methodChemiluminescence methodGravimetric methodNon dispersive infrared spec...

A bag filter is used for removal of particulate matter having a range of sizes. The correct sequence of air filtration mechanisms for their removal, in order of decreasin...