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U1 TEST WITH 100- SURE ANSWERS.
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U1 TEST WITH 100- SURE ANSWERS.
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10/3/24, 4:50 AMEUNICE
U1 TEST WITH 100% SURE ANSWERS
Observation wells are installed ____ the Inside, Outside
excavation, while monitoring wells are
installed ___ the excavation.
After piping areas are backfilled, _____ psi air 10 psi
pressure may be maintained in the piping,
provided no product has been in the piping.
In traffic areas, ensure that the trench is 6, 18
sufficiently deep to permit _____ inches of
bedding and at least ____ inches of
compacted backfill above piping.
T or F - Flexible connectors may be used for True
non-metallic or metallic piping.
What must be used on all pressurized piping PLLD (Pressurized Line Leak Detector)
systems to detect leaks?
Test new piping at ___ psi for a period of 50 psi, 60 minutes (1 hour)
____minutes, soaping all joints.
When sand is used: Sand is backfilled in 12 to 60%
18 inch lifts and compacted after each lift.
This needs to continue to a level that is ____ %
of the tanks height.
True of False: Couplings provided to protect False. Couplings furnished to protect pipe threads are disposable, and not to be used.
pipe threads may be used underground,
provided they are at least 18 inches below
grade.
True or False: Placement of the UST directly False: Placement of the the tank directly on the hold down pad is never permitted.
on the hold-down pad may be acceptable,
depending on the manufacturer's
specifications.
The ___ degree factor should be used to 45 degree
avoid undermining nearby structures.
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, 10/3/24, 4:50 AM
At least ____ feet of backfill is required 2 feet
between tanks and between the tank and
excavation walls.
To provide a firm foundation, a tank should One foot
be set on a bed of backfill material at least
_____ foot thick.
When a bottom hold down pad is used 6 inches
beneath a steel tank, the thickness of the
bedding material can be reduced to _____
inches.
Pressure imposed on tanks should not 5 psi
exceed __ psi.
Overfill alarms must be set at ____ % of tank 90%
capacity.
The maximum burial depth for Fiberglass 7 feet
tanks is ____ feet.
1. Ground and surface water
2. Unstable soil
Five factors that aggravate excavations are: 3. Backfill areas
4. Frost
5. Product and Vibrations
1. Soil Conditions
Slope of an excavation is determined by 2. Depth
what 4 factors? 3. Shoring requirements
4. Safety
True or False: A tank shipped with a liquid True
filled interstice need not be subjected to the
pre-installation air/soap test.
True or False: You should pressurize the True
interstice with air from the inner tank.
Pressure testing a tank should be monitored 1 hour
for how long?
True or False: Pressurizing the interstice with True
air pressure from the inner tank, after
disconnecting the outside source, prevents
over-pressurization.
True or False: It is standard practice to lower False
galvanic anodes by the lead wire.
Paving over tanks in traffic areas should 12 inches or 1 foot
extend at least ____ inches beyond the
perimeter of the tank.
Regarding tanks: In areas subject to vehicle 30 and 6
traffic. At least ____ inches of backfill and _____
inches of asphalt must be used.
True or False: Field coating of exposed True: Factory coatings should be used as much as possible.
metal fitting should be limited and used
sparingly.
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