WATER DISTRIBUTION PRACTICE TEST D1 /D2 QUESTIONS
WITH DETAILED VERIFIED AND 100% ACCURATE
ANSWERS
The only absolutely reliable method of backflow prevention is the use of
Correct Answers Air Gap
The bubbles formed in a positive multiple tube fermentation test are
Correct Answers Carbon Dioxide
The maximum rate of withdrawal of gas from a 150lb chlorine cylinder
in 24-hours is Correct Answers 40 lbs
If you encounter a liquid chlorine leak in a one tone container, what
action should you take first, to reduce the severity of the leak? Correct
Answers Rotate the container to place the leak at the top
The most commonly used water disinfectant in the United States is
Correct Answers Chlorine
When collecting a distribution system sample, the water should be
allowed to run for a period of time prior to sample collection. How long
Correct Answers As long as necessary to permit cleaning of service line
Sample bottles wich are furnished by a certified laboratory for collection
of bacteriological samples Correct Answers Are ready to use
, The difference between water pressure upstream and downstream of a
pump when it is not in operations is know as the Correct Answers Total
static head
A device that automatically shuts off flow in an elevated storage tank
when the water level in the tank reache a preset level is termed a Correct
Answers Altitude valve
In an occupied trench requiring personal egress what is the maximum
allowable distance between a worker and an exit letter Correct Answers
25 feet
A water bearing formation in the soil is referred to as Correct Answers
An aquifer
The distance between the static water level and the pumping water level
is termed the Correct Answers Drawdown
To prevent the entry of surface contamination into a well is the purpose
of Correct Answers Sanitary seal
The presence of coliform bacteria in a distribution system Correct
Answers Indicates that pathogenic organisms may be present also
The most common valve type in water distribution system is the Correct
Answers Gate valve
WITH DETAILED VERIFIED AND 100% ACCURATE
ANSWERS
The only absolutely reliable method of backflow prevention is the use of
Correct Answers Air Gap
The bubbles formed in a positive multiple tube fermentation test are
Correct Answers Carbon Dioxide
The maximum rate of withdrawal of gas from a 150lb chlorine cylinder
in 24-hours is Correct Answers 40 lbs
If you encounter a liquid chlorine leak in a one tone container, what
action should you take first, to reduce the severity of the leak? Correct
Answers Rotate the container to place the leak at the top
The most commonly used water disinfectant in the United States is
Correct Answers Chlorine
When collecting a distribution system sample, the water should be
allowed to run for a period of time prior to sample collection. How long
Correct Answers As long as necessary to permit cleaning of service line
Sample bottles wich are furnished by a certified laboratory for collection
of bacteriological samples Correct Answers Are ready to use
, The difference between water pressure upstream and downstream of a
pump when it is not in operations is know as the Correct Answers Total
static head
A device that automatically shuts off flow in an elevated storage tank
when the water level in the tank reache a preset level is termed a Correct
Answers Altitude valve
In an occupied trench requiring personal egress what is the maximum
allowable distance between a worker and an exit letter Correct Answers
25 feet
A water bearing formation in the soil is referred to as Correct Answers
An aquifer
The distance between the static water level and the pumping water level
is termed the Correct Answers Drawdown
To prevent the entry of surface contamination into a well is the purpose
of Correct Answers Sanitary seal
The presence of coliform bacteria in a distribution system Correct
Answers Indicates that pathogenic organisms may be present also
The most common valve type in water distribution system is the Correct
Answers Gate valve
