Practice Correlation For Mass Transfer Coefficients (4) - Evaporation from Different Surfaces

Practice: Correlation for Mass Transfer Coefficients

Lesson 4Evaporation from Different Surfaces

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8 questions

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Exercise
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2 questions · about 1 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
Define mass transfer coefficient.
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Think about its role in environmental engineering.
Question 2.
What does 'flux' refer to?
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Consider the context of pollutant movement.
3Question 3.
What does mass transfer coefficient measure?
- A. Temperature change
- B. Rate of substance movement
- C. Volume of liquid
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Consider what it tells us about transfer efficiency.
4Question 4.
True or False: DNAPLs are lighter than water.
- True
- False
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Recall characteristics of DNAPLs.
Question 5.
You have a river contaminated with a DNAPL affecting the water quality downstream. If the concentration in the sediment is 20 mg/L and in the water is 5 mg/L, using a mass transfer coefficient of 0.1 cm/hr, estimate the flux into the water.
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Make sure to plug in your values carefully and use the correct units.
Question 6.
A study results in a correlation for evaporation from water stated as K = 0.025 * (vel^0.5). If the average wind speed is 10 m/s, calculate the mass transfer coefficient for evaporation.
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Remember to evaluate the units based on the provided correlation.

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