Poly6 MA Grade 2 Wastewater Practice
Exam 2026-2027. Questions & Correct
Verified Answers. Graded A
_______ is a metal recovery technique. (PAGE 87)
a. Electrodialysis
b. Evaporation
c. Reverse Osmosis
d. All of the above - ANSd. All of the above
________ channel system exists wherever there is a free or unconfined
liquid surface. (SLIDE 38)
a. Closed
b. Air
c. Water
d. Open - ANSd. Open
________ is a form of chemical treatment. (SLIDE 50)
a. pH manipulation
b. Reverse Osmosis
c. Flocculation
d. Anaerobic Digestion - ANSa. pH manipulation
1
,A ______ meter measures pressure before and after a known restricted
section of pipe. (SLIDE 39)
a. Venturi
b. Propeller
c. Doppler Ultrasonic
d. Electromagnetic - ANSa. Venturi
A grab sample is... (PAGE 72)
a. An individual aliquot collected over a period of time not to exceed 15
minutes.
b. A combination of a series of aliquots taken on a flow or time proportional
basis over a period of time.
c. Tested as required by sewage discharge permits.
d. All of the above - ANSa. An individual aliquot collected over a period of
time not to exceed 15 minutes.
Acid solutions have the ___________ ion and basic solutions have the
__________ ion. (SLIDE 30)
a. O2 (oxygen), H+ (hydrogen)
b. H+ (hydrogen), OH- (hydroxide)
c. OH- (hydroxide), H+ (Hydrogen)
d. H+ (hydrogen), O2 (oxygen) - ANSb. H+ (hydrogen), OH- (hydroxide)
2
, Acids have a high concentration of... (SLIDE 30)
a. Hydroxide ions (OH)
b. Water molecules (H2O)
c. BODs
d. Hydrogen ions (H) - ANSd. Hydrogen ions (H)
Activated carbon can adsorb _______. (PAGE 92)
a. An infinite amount of a compound
b. Contaminants at low concentrations
c. A & B
d. None of the above - ANSb. Contaminants at low concentrations
An example of a closed channel measuring device is a(n)... (SLIDE 39)
a. Parshall flume
b. Orifice meter
c. Peristaltic pump
d. Diaphragm valve - ANSb. Orifice meter
Bearing failures can be caused by... (PAGE 65)
a. Misalignment
b. Lubrication failure
c. Contamination
d. All of the above - ANSd. All of the above
3
Exam 2026-2027. Questions & Correct
Verified Answers. Graded A
_______ is a metal recovery technique. (PAGE 87)
a. Electrodialysis
b. Evaporation
c. Reverse Osmosis
d. All of the above - ANSd. All of the above
________ channel system exists wherever there is a free or unconfined
liquid surface. (SLIDE 38)
a. Closed
b. Air
c. Water
d. Open - ANSd. Open
________ is a form of chemical treatment. (SLIDE 50)
a. pH manipulation
b. Reverse Osmosis
c. Flocculation
d. Anaerobic Digestion - ANSa. pH manipulation
1
,A ______ meter measures pressure before and after a known restricted
section of pipe. (SLIDE 39)
a. Venturi
b. Propeller
c. Doppler Ultrasonic
d. Electromagnetic - ANSa. Venturi
A grab sample is... (PAGE 72)
a. An individual aliquot collected over a period of time not to exceed 15
minutes.
b. A combination of a series of aliquots taken on a flow or time proportional
basis over a period of time.
c. Tested as required by sewage discharge permits.
d. All of the above - ANSa. An individual aliquot collected over a period of
time not to exceed 15 minutes.
Acid solutions have the ___________ ion and basic solutions have the
__________ ion. (SLIDE 30)
a. O2 (oxygen), H+ (hydrogen)
b. H+ (hydrogen), OH- (hydroxide)
c. OH- (hydroxide), H+ (Hydrogen)
d. H+ (hydrogen), O2 (oxygen) - ANSb. H+ (hydrogen), OH- (hydroxide)
2
, Acids have a high concentration of... (SLIDE 30)
a. Hydroxide ions (OH)
b. Water molecules (H2O)
c. BODs
d. Hydrogen ions (H) - ANSd. Hydrogen ions (H)
Activated carbon can adsorb _______. (PAGE 92)
a. An infinite amount of a compound
b. Contaminants at low concentrations
c. A & B
d. None of the above - ANSb. Contaminants at low concentrations
An example of a closed channel measuring device is a(n)... (SLIDE 39)
a. Parshall flume
b. Orifice meter
c. Peristaltic pump
d. Diaphragm valve - ANSb. Orifice meter
Bearing failures can be caused by... (PAGE 65)
a. Misalignment
b. Lubrication failure
c. Contamination
d. All of the above - ANSd. All of the above
3
