Podcast
Questions and Answers
What type of tank is used to allow sewage solids to settle at the bottom for anaerobic digestion?
What type of tank is used to allow sewage solids to settle at the bottom for anaerobic digestion?
- Sedimentation tank
- Septic tank (correct)
- Leaching tank
- Cesspool
How often is a septic tank usually de-sludged?
How often is a septic tank usually de-sludged?
- Once every 1-5 years (correct)
- Once a week
- Once every 10 years
- Once a month
What is the main purpose of a cesspool?
What is the main purpose of a cesspool?
- To treat sewage aerobically
- To provide drinking water
- To leach wastewater into the soil (correct)
- To store sewage solids
What happens if the bottom of a cesspool is not well above the ground water level?
What happens if the bottom of a cesspool is not well above the ground water level?
How often are water tight cesspools typically cleaned?
How often are water tight cesspools typically cleaned?
What distinguishes a seepage pit from a cesspool?
What distinguishes a seepage pit from a cesspool?
Which gas is colorless but has a suffocating, pungent odor?
Which gas is colorless but has a suffocating, pungent odor?
What is the unit commonly used to express concentrations of air pollutants?
What is the unit commonly used to express concentrations of air pollutants?
Which film on the stones assists in decomposing fine suspended solids in water?
Which film on the stones assists in decomposing fine suspended solids in water?
What is the primary source of NO2, a reddish-brown gas with a sharp odor?
What is the primary source of NO2, a reddish-brown gas with a sharp odor?
Exposure to which gas can reduce the amount of oxygen in the bloodstream?
Exposure to which gas can reduce the amount of oxygen in the bloodstream?
In air pollution terms, what does ppm stand for?
In air pollution terms, what does ppm stand for?
What environmental factor affects the relationship between ppm and mg/m3?
What environmental factor affects the relationship between ppm and mg/m3?
What is the largest source of Pb (lead) in the atmosphere?
What is the largest source of Pb (lead) in the atmosphere?
What is the term used to describe air pollutants that may cause cancer or other serious health effects?
What is the term used to describe air pollutants that may cause cancer or other serious health effects?
Why are substances considered air pollutants only at relatively high concentrations?
Why are substances considered air pollutants only at relatively high concentrations?
What causes geogenic radioactivity?
What causes geogenic radioactivity?
What has industrial development led to in terms of air pollution?
What has industrial development led to in terms of air pollution?
Which activity can contribute to elevated concentrations of harmful chemicals like VOCs in a building?
Which activity can contribute to elevated concentrations of harmful chemicals like VOCs in a building?
What type of emissions were found to continue causing problems even after reducing particle emissions?
What type of emissions were found to continue causing problems even after reducing particle emissions?
What is one of the main contributors to indoor pollution in buildings?
What is one of the main contributors to indoor pollution in buildings?
In what types of societies may resources not be sufficiently invested in air pollution control?
In what types of societies may resources not be sufficiently invested in air pollution control?
What issue does the use of inefficient and smoky fuels for heating and cooking create?
What issue does the use of inefficient and smoky fuels for heating and cooking create?
"Low-level" ozone is primarily formed due to the interaction of which two pollutants?
"Low-level" ozone is primarily formed due to the interaction of which two pollutants?
What health issues can arise from exposure to high levels of ambient sulfur dioxide concentrations?
What health issues can arise from exposure to high levels of ambient sulfur dioxide concentrations?
"Sick Building Syndrome" is associated with the accumulation of pollutants due to:
"Sick Building Syndrome" is associated with the accumulation of pollutants due to:
What is the main reason for the air quality problem indoors in many developed countries?
What is the main reason for the air quality problem indoors in many developed countries?
Which of the following is NOT mentioned as a health effect of ambient air pollution in the text?
Which of the following is NOT mentioned as a health effect of ambient air pollution in the text?
What effect does air pollution have on human health according to recent studies mentioned in the text?
What effect does air pollution have on human health according to recent studies mentioned in the text?
Which pollutant is associated with mucosal irritation such as acute or chronic bronchitis?
Which pollutant is associated with mucosal irritation such as acute or chronic bronchitis?
What is a characteristic of high levels of air pollution mentioned in the text?
What is a characteristic of high levels of air pollution mentioned in the text?
Which pollutants tend to occur together during summer months in most developed areas?
Which pollutants tend to occur together during summer months in most developed areas?
What is a classification of air pollutants based on the text?
What is a classification of air pollutants based on the text?
Which activity is NOT listed as a source of particulate matter (PM) according to the text?
Which activity is NOT listed as a source of particulate matter (PM) according to the text?
What do sulfur dioxide emissions contribute to based on the text?
What do sulfur dioxide emissions contribute to based on the text?
From where do emissions that may cause cancer in community air pollution usually come from?
From where do emissions that may cause cancer in community air pollution usually come from?
Which type of pollutants are formed as a result of reactions between primary pollutants and other elements in the atmosphere?
Which type of pollutants are formed as a result of reactions between primary pollutants and other elements in the atmosphere?
What was found to be the main effect of sulfur dioxide according to Amdur et al.'s study?
What was found to be the main effect of sulfur dioxide according to Amdur et al.'s study?
At what concentration of sulfur dioxide do persons with asthma who exercise typically experience symptoms?
At what concentration of sulfur dioxide do persons with asthma who exercise typically experience symptoms?
What is a major constituent of air pollution that is capable of forming acid and triggering broncho constriction?
What is a major constituent of air pollution that is capable of forming acid and triggering broncho constriction?
Which chemical species cause acid precipitation and can be transported long distances in the atmosphere?
Which chemical species cause acid precipitation and can be transported long distances in the atmosphere?
What process occurs when acid aerosols like sulfur dioxide, sulfates, and nitrogen dioxide deposit deeply in the distal lung and airspace?
What process occurs when acid aerosols like sulfur dioxide, sulfates, and nitrogen dioxide deposit deeply in the distal lung and airspace?
What is the secondary pollutant created by the oxidation of nitric oxide under conditions of sunlight?
What is the secondary pollutant created by the oxidation of nitric oxide under conditions of sunlight?
What is the major problem that sulfur dioxide caused during the period of rapid economic growth in many countries?
What is the major problem that sulfur dioxide caused during the period of rapid economic growth in many countries?
Which group tends to suffer more from the effects of sulfur dioxide according to the text?
Which group tends to suffer more from the effects of sulfur dioxide according to the text?
What levels of exposure to nitrogen dioxide should not be exceeded according to WHO guideline levels?
What levels of exposure to nitrogen dioxide should not be exceeded according to WHO guideline levels?
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