NC C-Distribution Study Guide 2
Question and answers already passed
2025
4 Steps of pipe handling - correct answer ✔Inspection
Unloading
Stacking
Stringing
Pipe Installation begins - correct answer ✔When pipe arrives onsite
Water Main Depth - correct answer ✔30 inches or below frost line, whichever
is greater.
Protection against cave-ins - correct answer ✔Sloping/Benching
Shoring
Shielding (protects not prevents)
Sheeting
angle of repose - correct answer ✔Angle at which soil will not slide
backwards
ANSI/AWWA Standard C652-11 - correct answer ✔Disinfection of storage
tanks and distribution systems using:
Continuous Feed - 50ppm for 24 hrs
Slug - 300ppm for 3hrs
, Tablet - glued every 500 ft sits for 24 hrs
Galvanized Pipe problem - correct answer ✔May have lead goosenecks
Multijet Meter - correct answer ✔May over register if clogged
ISO - correct answer ✔Insurance Services Office
Sets fire insurance rates
Flushing hydrant - correct answer ✔Requires standpipe to prevent cross
connection
Hydrant nozzle caps - correct answer ✔Only hand tightened to the point
unauthorized persons cannot remove by hand
Elevated Storage Tanks - correct answer ✔Must maintain 20 psi during peak
fire flow or 30 psi if not used for fire flow.
Vacuum Breaker - correct answer ✔Apparatus that protects from back-
siphonage but NOT back pressure
Atmospheric Vacuum Breaker - correct answer ✔A devise designed to
prevent back siphonage by letting air from the atmosphere into the line to
break the backflow siphon at the event of pressure loss
Pressure Vacuum Breaker - correct answer ✔A device designed to prevent
back siphonage, consisting of one independently operating spring-loaded
check valve and an independently operating spring loaded air-inlet valve.
Question and answers already passed
2025
4 Steps of pipe handling - correct answer ✔Inspection
Unloading
Stacking
Stringing
Pipe Installation begins - correct answer ✔When pipe arrives onsite
Water Main Depth - correct answer ✔30 inches or below frost line, whichever
is greater.
Protection against cave-ins - correct answer ✔Sloping/Benching
Shoring
Shielding (protects not prevents)
Sheeting
angle of repose - correct answer ✔Angle at which soil will not slide
backwards
ANSI/AWWA Standard C652-11 - correct answer ✔Disinfection of storage
tanks and distribution systems using:
Continuous Feed - 50ppm for 24 hrs
Slug - 300ppm for 3hrs
, Tablet - glued every 500 ft sits for 24 hrs
Galvanized Pipe problem - correct answer ✔May have lead goosenecks
Multijet Meter - correct answer ✔May over register if clogged
ISO - correct answer ✔Insurance Services Office
Sets fire insurance rates
Flushing hydrant - correct answer ✔Requires standpipe to prevent cross
connection
Hydrant nozzle caps - correct answer ✔Only hand tightened to the point
unauthorized persons cannot remove by hand
Elevated Storage Tanks - correct answer ✔Must maintain 20 psi during peak
fire flow or 30 psi if not used for fire flow.
Vacuum Breaker - correct answer ✔Apparatus that protects from back-
siphonage but NOT back pressure
Atmospheric Vacuum Breaker - correct answer ✔A devise designed to
prevent back siphonage by letting air from the atmosphere into the line to
break the backflow siphon at the event of pressure loss
Pressure Vacuum Breaker - correct answer ✔A device designed to prevent
back siphonage, consisting of one independently operating spring-loaded
check valve and an independently operating spring loaded air-inlet valve.
