Practice Plume Reflection And Concentration Models (1.7) - Gaussian Dispersion Model

Practice: Plume Reflection and Concentration Models

Lesson 1.7Gaussian Dispersion Model

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9 questions

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2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What does emission rate indicate?
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Think about what is being measured in terms of quantity.
Question 2.
Define fugitive emissions.
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Consider how emissions can be unplanned.
3Question 3.
What is the emission rate?
- Total emissions released per time
- Total emissions per volume
- Total emissions per distance
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Think about what is measured over time.
4Question 4.
True or False: Fugitive emissions are always planned.
- True
- False
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Consider the definition of fugitive emissions.
Question 5.
A factory emits nitrogen oxides at a rate of 40 lbs/hr. If the emission factor for the process is 0.02 lbs pollutant per unit of activity (here the activity is 2000 units), calculate the emission rate. Would the emission rate change if the activity was doubled?
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Refer back to the relationships between emission factor and activity rate.
Question 6.
Given a plume height of 50 meters with reflection considered, how can we mathematically illustrate the change at ground level concentration (using hypothetical numbers for concentration)?
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Remember the principles behind adding contributions from sources and using the equations presented.

5 more questions in this section. Enroll free to practise them all.