025-2026 PMT 108 EXAM WITH
2
QUESTIONS & ELABORATE ANSWERS
ow should petri dishes be stored in the HPC incubation process? - CORRECT
H
ANSWER-- Invert Petri Dish
- Stack no more than 4 high
- Not touching any other stacks or sides and top of the incubator
hat term describes: A chemical or physical process that kills microorganisms such as
W
bacteria, viruses and protozoa? - CORRECT ANSWER-Disinfectant
Which DPD tablet is used to find: TAC? - CORRECT ANSWER-#4
hat are the components of the LaMotte Kit? - CORRECT ANSWER-- Chlorine color
W
comparator (0.1- 1-0 mg/l)
- Chlorine color comparator (1.0-6.0 mg/l)
- pH color comparator (6.8-8.2 mg/l)
- Tablets: DPD #1 ,2, 3, 4 and phenol red
- Tablet crusher
- Test tube, glass and cap, fragile, marked at 10mL
hat does the quanti-tray system contain? - CORRECT ANSWER-- IDEXX Sample
W
Bottle: 100 mL
- Colilert reagent
- Quanti- Tray
- IDEXX Quanti- Tray sealer plus
hich HPC method is most often used in swimming pools? - CORRECT
W
ANSWER-Membrane filter method
hat is the de-chlorninating agent found in the sample container? - CORRECT
W
ANSWER-Sodium thiosulfate (Na2S2O3)
hat are some factors that need to be considered when selecting a water source? -
W
CORRECT ANSWER-- Sources of pollution
- Hydrological studies
, - Proposed intake
- Water uses identified for the particular water source by responsible government
agencies
hat term describes: A physical separation sufficient to prevent backflow between the
W
free- flowing discharge end of a potable water system outlet and any other system? -
CORRECT ANSWER-Air Gap
hat term describes: Self- closing device that is designed to allow the flow of fluids in
W
one direction and to close if there is a reversal flow? - CORRECT ANSWER-Check
Valve
hat term describes: Application of chlorine to produce the desired total chlorine
W
residual without reference to the amount of free or combined chlorine present? -
CORRECT ANSWER-Marginal Chlorination
hat are some examples of ground water? - CORRECT ANSWER-- Well
W
- Spring
escribe chemical qualities (characteristics) of potable water standards: - CORRECT
D
ANSWER-- Presence/ absence of constituents
- Interaction between constituents
- pH
- Hardness/ softness
escribe physical qualities (characteristics) of potable water standards: - CORRECT
D
ANSWER-- Color
- Odor
- Turbidity
- Temperature
What is unique about the NPDWR? - CORRECT ANSWER-It is federally enforcable
hich legislation: has been adopted by individual states and is concerned with public
W
water systems from a health standpoint? - CORRECT ANSWER-National Primary
Drinking Water Regulation (NPDWR)
hich law: Is the main federal law that ensures the quality of Americans' drinking
W
water? - CORRECT ANSWER-The Safe Drinking Water Act (SDWA)
2
QUESTIONS & ELABORATE ANSWERS
ow should petri dishes be stored in the HPC incubation process? - CORRECT
H
ANSWER-- Invert Petri Dish
- Stack no more than 4 high
- Not touching any other stacks or sides and top of the incubator
hat term describes: A chemical or physical process that kills microorganisms such as
W
bacteria, viruses and protozoa? - CORRECT ANSWER-Disinfectant
Which DPD tablet is used to find: TAC? - CORRECT ANSWER-#4
hat are the components of the LaMotte Kit? - CORRECT ANSWER-- Chlorine color
W
comparator (0.1- 1-0 mg/l)
- Chlorine color comparator (1.0-6.0 mg/l)
- pH color comparator (6.8-8.2 mg/l)
- Tablets: DPD #1 ,2, 3, 4 and phenol red
- Tablet crusher
- Test tube, glass and cap, fragile, marked at 10mL
hat does the quanti-tray system contain? - CORRECT ANSWER-- IDEXX Sample
W
Bottle: 100 mL
- Colilert reagent
- Quanti- Tray
- IDEXX Quanti- Tray sealer plus
hich HPC method is most often used in swimming pools? - CORRECT
W
ANSWER-Membrane filter method
hat is the de-chlorninating agent found in the sample container? - CORRECT
W
ANSWER-Sodium thiosulfate (Na2S2O3)
hat are some factors that need to be considered when selecting a water source? -
W
CORRECT ANSWER-- Sources of pollution
- Hydrological studies
, - Proposed intake
- Water uses identified for the particular water source by responsible government
agencies
hat term describes: A physical separation sufficient to prevent backflow between the
W
free- flowing discharge end of a potable water system outlet and any other system? -
CORRECT ANSWER-Air Gap
hat term describes: Self- closing device that is designed to allow the flow of fluids in
W
one direction and to close if there is a reversal flow? - CORRECT ANSWER-Check
Valve
hat term describes: Application of chlorine to produce the desired total chlorine
W
residual without reference to the amount of free or combined chlorine present? -
CORRECT ANSWER-Marginal Chlorination
hat are some examples of ground water? - CORRECT ANSWER-- Well
W
- Spring
escribe chemical qualities (characteristics) of potable water standards: - CORRECT
D
ANSWER-- Presence/ absence of constituents
- Interaction between constituents
- pH
- Hardness/ softness
escribe physical qualities (characteristics) of potable water standards: - CORRECT
D
ANSWER-- Color
- Odor
- Turbidity
- Temperature
What is unique about the NPDWR? - CORRECT ANSWER-It is federally enforcable
hich legislation: has been adopted by individual states and is concerned with public
W
water systems from a health standpoint? - CORRECT ANSWER-National Primary
Drinking Water Regulation (NPDWR)
hich law: Is the main federal law that ensures the quality of Americans' drinking
W
water? - CORRECT ANSWER-The Safe Drinking Water Act (SDWA)
