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Water Pollution Quiz: Energy and Environment

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Water Pollution Quiz: Energy and Environment

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Questions and Answers

What is the unit of DOi and DO?

[g/L]

[L/mg]

[mg/L] (correct)

[L/g]

What is the formula for Dilution Factor (D)?

D = Vb+Vs

D = Vs/Vb

D = Vb-Vs

D = Vb/Vs (correct)

What is the unit of time (t) in the BOD formula?

[days] (correct)

[weeks]

[months]

[hours]

What is the formula for BODt in terms of UBOD, k, and t?

BODt = UBOD * (1-e-kt) Signup and view all the answers

What is the unit of k in the BOD formula?

[day^-1] Signup and view all the answers

If the BOD5 of a wastewater is 150 mg/L at 20 ℃, what would be BOD8 if the test were run at 15 ℃?

175 mg/L Signup and view all the answers

What is the value of k in the BOD formula if BOD5 is 150 mg/L and UBOD is 200 mg/L?

0.23 per day Signup and view all the answers

What is the purpose of the Dilution Factor (D) in BOD calculation?

To convert the sample volume to standard units Signup and view all the answers

What is the significance of temperature in BOD calculation?

It affects the value of k in the BOD formula Signup and view all the answers

What is the unit of UBOD in the BOD formula?

[mg/L] Signup and view all the answers