ETC Air Quality & Emissions Monitoring 2

Question 1

Under the Clean Air Act, what is a 'criteria pollutant'?

Accepted Answer

One of six common air pollutants for which EPA has set NAAQS to protect public health and welfare

Answer

Any toxic air pollutant listed under Section 112

Answer

A pollutant that requires a Title V operating permit to emit

Answer

A pollutant identified only by state environmental agencies

Question 2

What does PM10 refer to in air quality monitoring?

Accepted Answer

Particulate matter with an aerodynamic diameter of 10 micrometers or less

Answer

Particulate matter with an aerodynamic diameter of 10 nanometers or less

Answer

Particulate matter measured at 10 meters above ground level

Answer

Particulate matter with a mass concentration of 10 µg/m³ or more

Question 3

What is 'opacity' as used in air emissions monitoring?

Accepted Answer

The percentage of light obscured by emissions leaving a stack or fugitive source

Answer

The total mass of particulate matter emitted per hour from a stack

Answer

The chemical composition of particulate matter in a plume

Answer

The height above ground at which stack emissions become diluted

Question 4

What is a fugitive emission?

Accepted Answer

An emission released from a source that is not captured by an exhaust hood or stack and vented to the atmosphere directly

Answer

An emission that escapes detection by a CEMS

Answer

An accidental release during a plant emergency or malfunction only

Answer

An emission from a mobile source such as a vehicle

Question 5

What is the role of a 'zero gas' when calibrating a continuous air quality analyzer?

Accepted Answer

A gas with no detectable concentration of the target pollutant used to set the instrument's zero response

Answer

A gas containing a certified known concentration of the target pollutant for span calibration

Answer

A gas used to purge moisture from the sample line before calibration

Answer

A gas that resets the analyzer's internal clock to a reference time

Question 6

Which Clean Air Act permit program requires large sources emitting above major source thresholds to obtain an operating permit that consolidates all air quality requirements?

Accepted Answer

Title V operating permit

Answer

New Source Review (NSR) permit

Answer

Prevention of Significant Deterioration (PSD) permit

Answer

State Implementation Plan (SIP) permit

Question 7

What does the Ringelmann scale measure?

Accepted Answer

The visible density or darkness of smoke emissions from a stack

Answer

The concentration of SO2 in flue gas

Answer

The particle size distribution of stack particulate matter

Answer

The efficiency of an electrostatic precipitator