CEE 160 - Environmental
Engineering: Quiz with MCQs
on Water Quality, Treatment
Processes, and Bioreactor
Kinetics
Which of the following describes a steady-state system:
a. Accumulation rate = 0
b. Reaction Rate = 0
c. Input rate = 0
d. Output rate = 0 - answer a. Accumulation rate = 0
Suppose some pollutant decomposes with a reaction rate coefficient k
equal to 0.25/day. What is the half-life of the pollutant?
a. 2.52 day
b. 2.77 day
c. 25.7 day
d. 0.17 day - answer b. 2.77 day
Which of the following describes the line labeled 'decay' in the graph on
the right?
a. It describes decay reaction in a conservative system
b. It is a plug flow reactor
c. C = C0 - kt
d. C = C0e^(-kt) - answer c. C = C0 - kt
What is the concentration of PO43- in M (mol/L) at equilibrium with the
presence of solid Ca3(PO4)2 (Ksp = 1x10^-27; Ca = 20; P = 31; O = 16)
, a. 2.1 x 10^-6 M
b. 3.1 x 10^-6 M
c. 55 x 10^-6 M
d. None of the above. - answer b. 3.1 x 10^-6 M
What is the percentage carbon, hydrogen and oxygen by weight in glucose
(C6H12O6)? (C = 12; H = 1; O = 16)
a. 6% C; 12% H; 82% O
b. 40% C; 6.7% H; 53% O
c. 72% C; 12% H; 16% O
d. None of the above. - answer b. 40% C; 6.7% H; 53% O
What is environmental justice?
a. Fair treatment and meaningful involvement of all people.
b. Equitable distribution of environmental risks and benefits.
c. Fair and meaningful participation in environmental decision-making.
d. Recognition of community ways of life, local knowledge, and cultural
difference.
e. The capability of communities and individuals to function and flourish in
society.
f. All of the above. - answer f. All of the above.
What are the environmental factors and conditions that you should
consider in setting up a BOD5 test?
a. Use black or brown incubation bottles to avoid light exposure.
b. Incubate in open wide-mouth bottles to enhance reaeration rate.
c. Make proper dilution to ensure the final dissolved oxygen is completely
exhausted.
d. Seed the bottle with biocide to inhibit the interference by bacterial
activities. - answer a. Use black or brown incubation bottles to avoid light
exposure.
Engineering: Quiz with MCQs
on Water Quality, Treatment
Processes, and Bioreactor
Kinetics
Which of the following describes a steady-state system:
a. Accumulation rate = 0
b. Reaction Rate = 0
c. Input rate = 0
d. Output rate = 0 - answer a. Accumulation rate = 0
Suppose some pollutant decomposes with a reaction rate coefficient k
equal to 0.25/day. What is the half-life of the pollutant?
a. 2.52 day
b. 2.77 day
c. 25.7 day
d. 0.17 day - answer b. 2.77 day
Which of the following describes the line labeled 'decay' in the graph on
the right?
a. It describes decay reaction in a conservative system
b. It is a plug flow reactor
c. C = C0 - kt
d. C = C0e^(-kt) - answer c. C = C0 - kt
What is the concentration of PO43- in M (mol/L) at equilibrium with the
presence of solid Ca3(PO4)2 (Ksp = 1x10^-27; Ca = 20; P = 31; O = 16)
, a. 2.1 x 10^-6 M
b. 3.1 x 10^-6 M
c. 55 x 10^-6 M
d. None of the above. - answer b. 3.1 x 10^-6 M
What is the percentage carbon, hydrogen and oxygen by weight in glucose
(C6H12O6)? (C = 12; H = 1; O = 16)
a. 6% C; 12% H; 82% O
b. 40% C; 6.7% H; 53% O
c. 72% C; 12% H; 16% O
d. None of the above. - answer b. 40% C; 6.7% H; 53% O
What is environmental justice?
a. Fair treatment and meaningful involvement of all people.
b. Equitable distribution of environmental risks and benefits.
c. Fair and meaningful participation in environmental decision-making.
d. Recognition of community ways of life, local knowledge, and cultural
difference.
e. The capability of communities and individuals to function and flourish in
society.
f. All of the above. - answer f. All of the above.
What are the environmental factors and conditions that you should
consider in setting up a BOD5 test?
a. Use black or brown incubation bottles to avoid light exposure.
b. Incubate in open wide-mouth bottles to enhance reaeration rate.
c. Make proper dilution to ensure the final dissolved oxygen is completely
exhausted.
d. Seed the bottle with biocide to inhibit the interference by bacterial
activities. - answer a. Use black or brown incubation bottles to avoid light
exposure.
