T2 Water Treatment Exam 2025 With
100% Correct Answers
What is .75 written as a percent? - CORRECT ANSWER✔✔75%
What is 25% written as a decimal? - CORRECT ANSWER✔✔.25
What is 23.785 squared? - CORRECT ANSWER✔✔23.785 x 23.786= 565.73
How many seconds are in two days? - CORRECT ANSWER✔✔60x60x48=172,800
If a person drinks 1/2 gallon of water a day how much have they drank in a year? - CORRECT
ANSWER✔✔.5x365=182.5
The raw water measures a ph of 6.5 and finished water measures a ph of 7.5. What factor
increase is this? - CORRECT ANSWER✔✔A ph increase of 1 is a tenfold increase in alkalinity.
If the ph of a water sample is above 7 it will have more of which of the following ions? -
CORRECT ANSWER✔✔OH- or hydroxide. A ph below 7 has more hydrogen H+ ions.
What are the three main components that comprise alkalinity in drinking water? - CORRECT
ANSWER✔✔Bicarbonate, Carbonate, and Hydroxide
Water that has a total hardness of 300mg/L as CaCO3 is considered to be_____? - CORRECT
ANSWER✔✔Too hard for drinking water
, As a certified operator, what are your main duties in the eyes of the state? - CORRECT
ANSWER✔✔Produce safe water according to state standards AND accurately document and
report the results
A public water system: - CORRECT ANSWER✔✔Has at least *15 service connections or regularly
serves and average of at least 25* individuals daily at least 60 days out of the year
What chemicals at the water treatment facility are MassDEP most concerned about regulating
from a public health perspective? - CORRECT ANSWER✔✔Chlorine, Hydrofluosilicic acid, Strong
caustic and acid chemicals
What is safe water? - CORRECT ANSWER✔✔Water free from disease causing organisms and
toxic substances
What are some of the major components of MassDEP's Chemical feed strategies? - CORRECT
ANSWER✔✔Chemical feed rates should be flow paced, a means to measure treated water flow,
chemical pumps shall be interlocked to start and stop with the flow of water
Rain water which enters surface water bodies from the streams is called: - CORRECT
ANSWER✔✔Surface runoff
What effect does algae have on surface water ph? - CORRECT ANSWER✔✔Ph increases during
the day and decreases at night
Why do intake systems for surface water treatment plants contain intakes at multiple levels? -
CORRECT ANSWER✔✔To allow the operator flexibility in water quality received at the WTF
What is the zone of saturation? - CORRECT ANSWER✔✔Groundwater
What are the three main types of well construction? - CORRECT ANSWER✔✔Dug, driven, drilled
100% Correct Answers
What is .75 written as a percent? - CORRECT ANSWER✔✔75%
What is 25% written as a decimal? - CORRECT ANSWER✔✔.25
What is 23.785 squared? - CORRECT ANSWER✔✔23.785 x 23.786= 565.73
How many seconds are in two days? - CORRECT ANSWER✔✔60x60x48=172,800
If a person drinks 1/2 gallon of water a day how much have they drank in a year? - CORRECT
ANSWER✔✔.5x365=182.5
The raw water measures a ph of 6.5 and finished water measures a ph of 7.5. What factor
increase is this? - CORRECT ANSWER✔✔A ph increase of 1 is a tenfold increase in alkalinity.
If the ph of a water sample is above 7 it will have more of which of the following ions? -
CORRECT ANSWER✔✔OH- or hydroxide. A ph below 7 has more hydrogen H+ ions.
What are the three main components that comprise alkalinity in drinking water? - CORRECT
ANSWER✔✔Bicarbonate, Carbonate, and Hydroxide
Water that has a total hardness of 300mg/L as CaCO3 is considered to be_____? - CORRECT
ANSWER✔✔Too hard for drinking water
, As a certified operator, what are your main duties in the eyes of the state? - CORRECT
ANSWER✔✔Produce safe water according to state standards AND accurately document and
report the results
A public water system: - CORRECT ANSWER✔✔Has at least *15 service connections or regularly
serves and average of at least 25* individuals daily at least 60 days out of the year
What chemicals at the water treatment facility are MassDEP most concerned about regulating
from a public health perspective? - CORRECT ANSWER✔✔Chlorine, Hydrofluosilicic acid, Strong
caustic and acid chemicals
What is safe water? - CORRECT ANSWER✔✔Water free from disease causing organisms and
toxic substances
What are some of the major components of MassDEP's Chemical feed strategies? - CORRECT
ANSWER✔✔Chemical feed rates should be flow paced, a means to measure treated water flow,
chemical pumps shall be interlocked to start and stop with the flow of water
Rain water which enters surface water bodies from the streams is called: - CORRECT
ANSWER✔✔Surface runoff
What effect does algae have on surface water ph? - CORRECT ANSWER✔✔Ph increases during
the day and decreases at night
Why do intake systems for surface water treatment plants contain intakes at multiple levels? -
CORRECT ANSWER✔✔To allow the operator flexibility in water quality received at the WTF
What is the zone of saturation? - CORRECT ANSWER✔✔Groundwater
What are the three main types of well construction? - CORRECT ANSWER✔✔Dug, driven, drilled
