WATER DISTRIBUTION D1/D2 TEST
ASSESSMENTS & QUIZZES WITH
CORRECT SOLUTIONS A+ GRADED
K
C
LO
YC
D
U
ST
, The only absolutely reliable method of backflow prevention is the use of
Air Gap
The bubbles formed in a positive multiple tube fermentation test are
Carbon Dioxide
The maximum rate of withdrawal of gas from a 150 lb chlorine cylinder in 24-hours is
K
40 lbs
C
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?
Rotate the container to place the leak at the top
LO
The most commonly used water disinfectant in the United States is
Chlorine
YC
When collecting a distribution system sample, the water should be allowed to run for a period of
time prior to sample collection. How long
As long as necessary to permit cleaning of service line
D
Sample bottles wich are furnished by a certified laboratory for collection of bacteriological
samples
Are ready to use
U
The difference between water pressure upstream and downstream of a pump when it is not in
ST
operations is know as the
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
Altitude valve
In an occupied trench requiring personal egress what is the maximum allowable distance
between a worker and an exit letter
ASSESSMENTS & QUIZZES WITH
CORRECT SOLUTIONS A+ GRADED
K
C
LO
YC
D
U
ST
, The only absolutely reliable method of backflow prevention is the use of
Air Gap
The bubbles formed in a positive multiple tube fermentation test are
Carbon Dioxide
The maximum rate of withdrawal of gas from a 150 lb chlorine cylinder in 24-hours is
K
40 lbs
C
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?
Rotate the container to place the leak at the top
LO
The most commonly used water disinfectant in the United States is
Chlorine
YC
When collecting a distribution system sample, the water should be allowed to run for a period of
time prior to sample collection. How long
As long as necessary to permit cleaning of service line
D
Sample bottles wich are furnished by a certified laboratory for collection of bacteriological
samples
Are ready to use
U
The difference between water pressure upstream and downstream of a pump when it is not in
ST
operations is know as the
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
Altitude valve
In an occupied trench requiring personal egress what is the maximum allowable distance
between a worker and an exit letter
