課程名稱︰環境工程概論
課程性質︰選修
課程教師︰林正芳
開課學院：工學院
開課系所︰環工所
考試日期（年月日）︰ 2007/10/29
考試時限（分鐘）：
是否需發放獎勵金：是 謝謝
（如未明確表示，則不予發放）
試題 :
Introduction to Environmental Engineering
Exam I
10/29/2007
Multiple Choice Questions: Choose ONE correct answer for each question and
fill it in the answer sheet. Answer in other areas will not be graded.
1.5 points per question, 30 points total.
1. Which step is NOT included in a conventional
wastewater treatment process?
A. Primary sedimentation
B. Reverse osmosis
C. Aeration Tank
D. Return sludge
2. Which statement regarding water pollution is
NOT true?
A. Urban runoff is non-point source pollution
B. Sewage discharge is point source pollution
C. Sand and soil are nature particles, need not
be treated
D. Organic pollutants will potentially
consume oxygen in water
3. Which of the following statement concerning
oxygen consumption in water is true?
A. NBOD is a result of ammonia oxidation
B. The lowest dissolve oxygen downstream of
a sewage discharge is at the very beginning
of discharge port
C. Aquatic animals like fish could consume
dissolve oxygen hence increase the BOD
D. Theoretically, BOD is always higher than
COD
4. From the following unit processes, chose the
most probable process sequence for potable water
treatment of a river water receiving land
drainage:
1) clarifier. 2) flocculator. 3) aeration. 4)
chlorinator. 5) storage. 6) rapid sand filter. 7)
chemical mix. 8) activated carbon adsorption 9)
membrane filtration
A. 36459
B. 3127645
C. 4618475
D. 7216845
5. Particle migration by gravity is the principle
behind particulate removal in a:
A. Clarifier
B. Wet scrubber
C. Chlorine contact tank
D. Nanofiltration
6. Which is the form of free chlorine residual in
water in a reaction of Cl2 with water?
A. NH2Cl
B. NHCl2
C. HOCl
D. ClO2
7. The ultimate BOD for a wastewater is 350 mg/L,
what is the BOD5 if K=0.2 d-1?
A. 300
B. 315
C. 275
D. 142
8. The process responsible for gaseous dinitrogen
(N2) formation from mineral nitrogen compounds
on earth for return to the atmosphere is
A. Deamination
B. Photosynthesis
C. Nitrogen fixation
D. Denitrification
9. Which of the following is prokaryotic and
autotrophic?
A. Cyanobacteria
B. Protozoa
C. Viruses
D. Algae
10. Which of the following falls into the category of
nutrients as a measure of water quality:
A. Metals
B. Phosphorus
C. Oxygen
D. BOD
11. The undesirable formation of trihalomethanes in
water is most probable with the addition of:
A. Ozone
B. Chlorine
C. Chlorine dioxide
D. Chloramine
12. A five day BOD for a wastewater sample was
reported as 350 mg/L. A 3mL volume of the
wastewater was added to the BOD bottle (300
mL in volume). The oxygen consumed in the
bottle for the five day period was:
A. 350 mg/L
B. 15 mg/L
C. 3.5 mg/L
D. 120 mg/L
13. Which of the following unit processes is part of
secondary treatment (in wastewater treatment)
A. Grit chamber
B. Primary clarifier
C. Air stripping tower
D. Aeration tank
14. Which of the following unit processes provides
solids removal characterized by hindered settling
(type II settling)?
A. Bar racks
B. Grit chamber
C. Primary clarifier
D. Trickling filter
15. Methane is a gaseous end product of which of the
following unit processes of wastewater treatment:
A. Trickling filter
B. Secondary clarifier
C. Anaerobic digester
D. Activated sludge
16. Which of the following unit processes requires
periodic backwashing:
A. Slow sand filter
B. Rapid sand filter
C. Flocculator
D. Clarifier
17. The primary purpose of drinking water
disinfection is to:
A. Remove BOD
B. Sterilize the water
C. Kill pathogens
D. Lower the Ph
18. Which of the following treatments is suitable
(better) for removing volatile organic solvent
contamination from groundwater?
A. Air sparging
B. Phytoremediation
C. Electrokinetics
D. Multi-phase extraction
19. Which of the following statement regarding
remediation is NOT true?
A. Soil remediation takes a long time
B. The plastic cover for the remediation site is
to prevent air circulation
C. Electrokinetic techniques could be used for
metal decontamination
D. Permeable reactive barriers could
chemically remove contaminants
20. Which of the following contaminants is the
toughest one to be removed by bioremediation?
A. Chromium
B. Cellulose
C. Naphthalene
D. Catechol
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