WATER DISTRIBUTION TEST #4 QUESTIONS WITH
COMPLETE SOLUTIONS
when spraying a tank how many people should be available?
1 in the tank and 2 backups people for assistance if emergency
After chlorinating with 200 ppm of a tank, what is the procedure
for filling it with water.
let stand for least 30 minutes, fill with water with residual of 3.0
mg/L and let stand for 3-6 hours, then take BACT-T samples.
what are other methods to disinfect a new tank?
fill up tank with at least 10mg/L of water for 24hrs.
Name a stipulation concerning disinfecting a new tank?
first time newly constructed tank, 50 ppm (instead of 3ppm)
when placing a tank back in service for 24 hours.
what disinfection method is used for different size storage tanks.
tank over 100,000 gal. use gaseous chlorine, below 100,000 gal.
us HTH
when divers are used to inspect a tank what is the proper
procedure?
they need to be disinfected with 200 mg/L
name procedures to prevent icing in storage tanks.
flow rate into and out adjusted to allow circulation 50%
variation within 24 hrs. or used air bubble to circulate water
, how often maintenance should be done on storage tanks?
covered tanks every 3-5 yrs. and uncovered annually or twice a
year.
most booster pump are connected to service high elevation and
controlled by?
solenoid switch to altitude valve.
what are regulator stations main function?
reduce psi and maintain even acceptable psi down stream.
what is excessive psi and what's normal psi in the system?
100 and 60-90
how often should you operate and overhaul regulator station?
once a month and inspected annually
record of data, date of installation, start up data, failure, and
service performed on equipment should be record on what?
nameplate
what type of ventilation is necessary storage facility
force-draft
Hydraulic transients are commonly called?
surge, shock or water hammer
the major hydraulic concerns of a water distribution system are
whether water will flow, & in what direction
water should be delivered with a working pressure of?
COMPLETE SOLUTIONS
when spraying a tank how many people should be available?
1 in the tank and 2 backups people for assistance if emergency
After chlorinating with 200 ppm of a tank, what is the procedure
for filling it with water.
let stand for least 30 minutes, fill with water with residual of 3.0
mg/L and let stand for 3-6 hours, then take BACT-T samples.
what are other methods to disinfect a new tank?
fill up tank with at least 10mg/L of water for 24hrs.
Name a stipulation concerning disinfecting a new tank?
first time newly constructed tank, 50 ppm (instead of 3ppm)
when placing a tank back in service for 24 hours.
what disinfection method is used for different size storage tanks.
tank over 100,000 gal. use gaseous chlorine, below 100,000 gal.
us HTH
when divers are used to inspect a tank what is the proper
procedure?
they need to be disinfected with 200 mg/L
name procedures to prevent icing in storage tanks.
flow rate into and out adjusted to allow circulation 50%
variation within 24 hrs. or used air bubble to circulate water
, how often maintenance should be done on storage tanks?
covered tanks every 3-5 yrs. and uncovered annually or twice a
year.
most booster pump are connected to service high elevation and
controlled by?
solenoid switch to altitude valve.
what are regulator stations main function?
reduce psi and maintain even acceptable psi down stream.
what is excessive psi and what's normal psi in the system?
100 and 60-90
how often should you operate and overhaul regulator station?
once a month and inspected annually
record of data, date of installation, start up data, failure, and
service performed on equipment should be record on what?
nameplate
what type of ventilation is necessary storage facility
force-draft
Hydraulic transients are commonly called?
surge, shock or water hammer
the major hydraulic concerns of a water distribution system are
whether water will flow, & in what direction
water should be delivered with a working pressure of?
