2024 WASTEWATER OPERATOR
CERTIFICATION STUDY GUIDE
GRADE 1 EXAM WITH CORRECT
ANSWERS
Basic Chemistry:
What piece of laboratory glassware is primarily used to mix checmicals and
measure approximately volumes? - CORRECT-ANSWERSbeaker
Basic Chemistry:
The electrical potential between two points is measured in - CORRECT-
ANSWERSvolts
Basic Chemistry:
What is the most common use today for a positive-displacement pump -
CORRECT-ANSWERSchemical feed pump
Basic Chemistry:
Which lab glassware will give the most accurate measurements of liquids -
CORRECT-ANSWERSburettes
Basic Chemistry:
Which lab glassware is used for measuring volumes - CORRECT-
ANSWERSgraduated cylinders
Basic Chemistry:
People working in and around wastewater must be immunized for -
CORRECT-ANSWERStetanus
Basic Chemistry:
Which lab tests has a zero holding time - CORRECT-ANSWERSchlorine
residual
, Basic Chemistry:
Which one of the following statements concerning colloids is false?
a. solutes have a greater effect on freezing and boiling points of liquids than
do colloids
b. only very small colloids will pass through a semipermeable membrane
c. the average wavelength of white light is smaller than the dimensions of
colloidal particles
d. dialysis is the separation of colloids from solutes through a semipermeable
membrane - CORRECT-ANSWERSd. dialysis is the separation of colloids from
solutes through a semipermeable membrane
Basic Chemistry:
Describe "colloids" - CORRECT-ANSWERSan ion opposite in charge to a
colloidal particle will force its way into the colloidal particle
Basic Chemistry:
Water is used as a standard because it has unique properties and is readily
available in its pure state. Which standard is not correct?
a. Celsius scale
b. the calorie
c. the kilogram
d. specific gravity - CORRECT-ANSWERSthe kilogram
Basic Chemistry:
What acids are formed when water reacts with nonmetal oxides?
a. acid hydroxides
b. acid anhydrides
c. acid oxides
d. acid hydrates - CORRECT-ANSWERSacid anhydrides
Basic Chemistry:
Which one of the following is not a hydrate:
a. alum
b. blue nitrate
CERTIFICATION STUDY GUIDE
GRADE 1 EXAM WITH CORRECT
ANSWERS
Basic Chemistry:
What piece of laboratory glassware is primarily used to mix checmicals and
measure approximately volumes? - CORRECT-ANSWERSbeaker
Basic Chemistry:
The electrical potential between two points is measured in - CORRECT-
ANSWERSvolts
Basic Chemistry:
What is the most common use today for a positive-displacement pump -
CORRECT-ANSWERSchemical feed pump
Basic Chemistry:
Which lab glassware will give the most accurate measurements of liquids -
CORRECT-ANSWERSburettes
Basic Chemistry:
Which lab glassware is used for measuring volumes - CORRECT-
ANSWERSgraduated cylinders
Basic Chemistry:
People working in and around wastewater must be immunized for -
CORRECT-ANSWERStetanus
Basic Chemistry:
Which lab tests has a zero holding time - CORRECT-ANSWERSchlorine
residual
, Basic Chemistry:
Which one of the following statements concerning colloids is false?
a. solutes have a greater effect on freezing and boiling points of liquids than
do colloids
b. only very small colloids will pass through a semipermeable membrane
c. the average wavelength of white light is smaller than the dimensions of
colloidal particles
d. dialysis is the separation of colloids from solutes through a semipermeable
membrane - CORRECT-ANSWERSd. dialysis is the separation of colloids from
solutes through a semipermeable membrane
Basic Chemistry:
Describe "colloids" - CORRECT-ANSWERSan ion opposite in charge to a
colloidal particle will force its way into the colloidal particle
Basic Chemistry:
Water is used as a standard because it has unique properties and is readily
available in its pure state. Which standard is not correct?
a. Celsius scale
b. the calorie
c. the kilogram
d. specific gravity - CORRECT-ANSWERSthe kilogram
Basic Chemistry:
What acids are formed when water reacts with nonmetal oxides?
a. acid hydroxides
b. acid anhydrides
c. acid oxides
d. acid hydrates - CORRECT-ANSWERSacid anhydrides
Basic Chemistry:
Which one of the following is not a hydrate:
a. alum
b. blue nitrate
