Recent questions in Air and Noise Pollution

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 ...

A sample of air is collected in the morning at an ambient temperature of $\mathbf{2 5}{ }^{\circ} \mathbf{C}$. The concentration of carbon monoxide $\text{(CO)}$ in this ...

In the context of noise pollution, SPL is the sound pressure level in decibels (dB). The relationship between SPL, the root mean square $\text{(rms)}$ sound pressure $p$ ...

Match the entries in Column I with the correct entries in Column II.Column IColumn IIDiffusionPasquillDrag forceFickAtmospheric stabilityStokes$\text{P-(iii), Q-(ii), R-(...

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...

In air pollution, which of the following is/are classified as primary pollutants?Carbon monoxide $(\mathrm{CO})$Sulphur dioxide $\left(\mathrm{SO}_{2}\right)$Ozone $\left...

The concentration of $\mathrm{NO}_{2}$ in the air at $\mathrm{NTP}$ is reported as $0.30$ ppmv $\text{(ppm by volume)}$. The concentration of $\mathrm{NO}_{2} \mathrm{in}...

Which one of the following is most commonly used raw material in flue gas desulfurization units?LimestoneTitanium OxideFenton reagentBeryllium Oxide

$\quad \mathrm{PM}_{2.5}$ 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...

A relatively calm room has background sound power level (SPL) of 30 decibels (dB). A television and a radio with SPL of $80 \mathrm{~dB}$ and $70 \mathrm{~dB}$, respectiv...

According to the National Ambient Air Quality Standards (Central Pollution Control Board, Govt. of India, notification 2009) which of the following statement(s) is/are co...

Consider the figure shown below for three different cases:Which of the following statement(s) is/are correct for surface level emissions, given the environmental temperat...

A ground level source emits $1000 \mathrm{~g}$ per day of $\mathrm{SO}_{2}$. In vicinity of the source, ambient temperature is measured at $10 \mathrm{~m}$ and $110 \math...