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Air-pollution Questions Set 3:

Quiz Mode

Which compound causes methemoglobinemia, also known as 'blue baby syndrome'?

NO2

NO3

Solution:

From the pollutants listed, identify the secondary air pollutant.

Ozone (O3)

Carbon oxides (CO and CO2)

Hydrocarbons

Sulfur oxides

Solution:

Which of the following are natural contributors to sulfur dioxide in the atmosphere?

Sea sprays

Decaying vegetation

Volcanic eruptions

All of the above

Solution:

By international convention, which line marks the boundary between the Earth's atmosphere and outer space?

Space line

Boundary line

Karman line

Astronaut line

Solution:

What is the full form of VOCs (Volatile Organic Compounds)?

Volatile Organic Compounds

Volatile Oxide Compounds

Vercetile Organic compounds

None of the above

Solution:

Which one of the following options contains ONLY primary air pollutants?

Hydrocarbons and ozone

Ozone and peroxyacetyl nitrate

Hydrocarbons and nitrogen oxides

Nitrogen oxides and peroxyacetyl nitrate

Solution:

There are 20000 vehicles operating in a city with an average annual travel of 12000 km per vehicle. The NOx emission rate is 2.0 g/km per vehicle. The total annual release of NOx will be

480000 kg

4800 kg

480 kg

48 kg

Solution:

A sample of air analyzed at 0^oC and 1 atm pressure is reported to contain 0.02 ppm (parts per million) of NO₂. Assume the gram molecular mass of NO₂ as 46 and its volume at 0^oC and 1 atm pressure as 22.4 liters per mole. The equivalent NO₂ concentration (in microgram per cubic meter, round off to 2 decimal places) would be_____.

Solution:

It was decided to construct a fabric filter, using bags of 0.45 m diameter and 7.5 m long, for removing industrial stack gas containing particulates. The expected rate of airflow into the filter is 10 m3/s. If the filtering velocity is 2.0 m/min, the minimum number of bags (rounded to nearest higher integer) required for continuous cleaning operation is

Solution:

A gas contains two types of suspended particles having average sizes of 2 µm and 50µm. Amongst the options given below, the most suitable pollution control strategy for removal of these particles is

Electrostatic precipitator followed by cyclonic separator

Electrostatic precipitator followed by venturi scrubber

Settling chamber followed by bag filter

Bag filter followed by electrostatic precipitator

Air-pollution Questions Set 3:

Which compound causes methemoglobinemia, also known as 'blue baby syndrome'?

Solution:

From the pollutants listed, identify the secondary air pollutant.

Solution:

Which of the following are natural contributors to sulfur dioxide in the atmosphere?

Solution:

By international convention, which line marks the boundary between the Earth's atmosphere and outer space?

Solution:

What is the full form of VOCs (Volatile Organic Compounds)?

Solution:

Which one of the following options contains ONLY primary air pollutants?

Solution:

There are 20000 vehicles operating in a city with an average annual travel of 12000 km per vehicle. The NOx emission rate is 2.0 g/km per vehicle. The total annual release of NOx will be

Solution:

Solution:

Solution:

A gas contains two types of suspended particles having average sizes of 2 µm and 50µm. Amongst the options given below, the most suitable pollution control strategy for removal of these particles is

Solution:

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