ETC Air Quality & Emissions Monitoring 3

Question 1

Which precursor pollutants combine in sunlight to form ground-level ozone (O3)?

Accepted Answer

Volatile organic compounds (VOCs) and nitrogen oxides (NOx)

Answer

Carbon monoxide (CO) and sulfur dioxide (SO2)

Answer

Ammonia (NH3) and particulate matter (PM2.5)

Answer

Lead (Pb) and carbon dioxide (CO2)

Question 2

EPA Method 6 is used to determine the concentration of which pollutant in stack gas?

Accepted Answer

Sulfur dioxide (SO2)

Answer

Nitrogen oxides (NOx)

Answer

Carbon monoxide (CO)

Answer

Total hydrocarbons (THC)

Question 3

What is the primary purpose of a high-volume (Hi-Vol) air sampler in ambient air monitoring?

Accepted Answer

To collect a large volume of air through a filter to determine PM10 or TSP mass concentrations

Answer

To continuously measure real-time ozone concentrations

Answer

To capture gaseous pollutants in liquid impingers for chemical analysis

Answer

To measure wind speed and direction for dispersion modeling

Question 4

Under what condition would an environmental technician report an air monitoring instrument as 'out of calibration'?

Accepted Answer

When the instrument reading drifts more than the allowable tolerance from the certified reference standard value during a calibration check

Answer

When the instrument has been in service for more than 30 days without replacement

Answer

When the sample line exceeds 10 meters in length

Answer

When ambient temperature drops below 10°C

Question 5

What does an air dispersion model (such as AERMOD) primarily calculate?

Accepted Answer

Predicted pollutant concentrations at receptor locations downwind of emission sources

Answer

The total mass of pollutants emitted from a facility per year

Answer

The efficiency of air pollution control equipment installed at a source

Answer

Ambient background concentrations of criteria pollutants at a monitoring station

Question 6

What does the term 'attainment area' mean in the context of NAAQS compliance?

Accepted Answer

A geographic area that meets all applicable NAAQS for a given pollutant

Answer

A geographic area that has exceeded a NAAQS and must develop an emission reduction plan

Answer

A facility that has achieved its permitted emission limits for three consecutive years

Answer

A monitoring station where ambient air quality data collection has been completed

Question 7

Which type of air pollution control device uses an electrical charge to remove particulate matter from industrial exhaust gas streams?

Accepted Answer

Electrostatic precipitator (ESP)

Answer

Cyclone separator

Answer

Venturi scrubber

Answer

Fabric filter baghouse