ICC U1 Test Questions And
Correct Answers
Observation wells are installed _____the excavation, while monitoring wells are
installed _______the excavation.
Inside, Outside
After piping areas are backfilled, _______psi air pressure may be maintained in the
piping, provided no product has been in the piping.
10 psi
In traffic areas, ensure that the trench is sufficiently deep to permit _______inches of
bedding and at least _____ inches of compacted backfill above piping.
6, 18
T or F - Flexible connectors may be used for non-metallic or metallic piping.
True
What must be used on all pressurized piping systems to detect leaks?
,PLLD (Pressurized Line Leak Detector)
Test new piping at _____psi for a period of ____minutes, soaping all joints.
50 psi, 60 minutes (1 hour)
When sand is used: Sand is backfilled in 12 to 18 inch lifts and compacted after each
lift. This needs to continue to a level that is _____% of the tanks height.
60%
True of False: Couplings provided to protect pipe threads may be used underground,
provided they are at least 18 inches below grade.
False. Couplings furnished to protect pipe threads are disposable, and not to be used.
True or False: Placement of the UST directly on the hold-down pad may be acceptable,
depending on the manufacturer's specifications.
False: Placement of the the tank directly on the hold down pad is never permitted.
The _____degree factor should be used to avoid undermining nearby structures.
45 degree
, At least _____ feet of backfill is required between tanks and between the tank and
excavation walls.
2 feet
To provide a firm foundation, a tank should be set on a bed of backfill material at least
_____ foot thick.
One foot
When a bottom hold down pad is used beneath a steel tank, the thickness of the
bedding material can be reduced to _____ inches.
6 inches
Pressure imposed on tanks should not exceed _____ psi.
5 psi
Overfill alarms must be set at ______% of tank capacity.
90%
The maximum burial depth for Fiberglass tanks is _____ feet.
Correct Answers
Observation wells are installed _____the excavation, while monitoring wells are
installed _______the excavation.
Inside, Outside
After piping areas are backfilled, _______psi air pressure may be maintained in the
piping, provided no product has been in the piping.
10 psi
In traffic areas, ensure that the trench is sufficiently deep to permit _______inches of
bedding and at least _____ inches of compacted backfill above piping.
6, 18
T or F - Flexible connectors may be used for non-metallic or metallic piping.
True
What must be used on all pressurized piping systems to detect leaks?
,PLLD (Pressurized Line Leak Detector)
Test new piping at _____psi for a period of ____minutes, soaping all joints.
50 psi, 60 minutes (1 hour)
When sand is used: Sand is backfilled in 12 to 18 inch lifts and compacted after each
lift. This needs to continue to a level that is _____% of the tanks height.
60%
True of False: Couplings provided to protect pipe threads may be used underground,
provided they are at least 18 inches below grade.
False. Couplings furnished to protect pipe threads are disposable, and not to be used.
True or False: Placement of the UST directly on the hold-down pad may be acceptable,
depending on the manufacturer's specifications.
False: Placement of the the tank directly on the hold down pad is never permitted.
The _____degree factor should be used to avoid undermining nearby structures.
45 degree
, At least _____ feet of backfill is required between tanks and between the tank and
excavation walls.
2 feet
To provide a firm foundation, a tank should be set on a bed of backfill material at least
_____ foot thick.
One foot
When a bottom hold down pad is used beneath a steel tank, the thickness of the
bedding material can be reduced to _____ inches.
6 inches
Pressure imposed on tanks should not exceed _____ psi.
5 psi
Overfill alarms must be set at ______% of tank capacity.
90%
The maximum burial depth for Fiberglass tanks is _____ feet.
