KENTUCKY UST CERTIFICATION TEST PREP 160
CERTIFICATION EVALUATION 2026
COMPREHENSIVE QUESTIONS ANSWERS
◉ when installing dielectric bushings in a cathodically protected
steel tank prior to placing the tank in the excavation you should
Answer: make sure that no electric current can pass through the
dielectric flanges or bushings
◉ industry codes as well as the specifications of individual
manufacturers do not entirely agree as to the minimum space that
should be maintained between tanks and stalled in stable soil
conditions. what ranges of minimum spacing between tanks derived
from various industry codes and manufacture specifications which
range is most accurate. Answer: from 12 inches to 24 inches
◉ acceptable bedding material for steel tanks include.... Answer:
clean washed well granulated gravel sand or Rock between 1/8 inch
and 1/2 inch in size
pea gravel with a minimum diameter of 1/8 inch and a maximum
diameter of 3/4 inch
number 8 crushed stone
,◉ how should steel tanks should be lowered into the excavation
Answer: through the use of lifting lugs installed by the manufacture
and use of lifting equipment of sufficient capacity to lift and lower
the tank
◉ when installing a steel tank which has zinc anodes welded directly
onto the tank for cathodic protection you should Answer: remove
the plastic wrapping around the anodes prior to installation
◉ if local authorities and tank manufacturers permit a sand slurry
mixture to be used for backfilling a tank what steps should be taken
to ensure that use of the slurry is proper? Answer: use only
Personnel trained in the sand slurry method by the tank
manufacturer and use the method only with the manufacturer's
prior approval
◉ in making a tank excavation if you discover that the specific call
for the burial depth of the steel tank to be greater than the tank
diameter what should you do? Answer: consult the tank
manufacturer to determine if reinforcements will be required
◉ what is the minimum depth of bedding required for a pipe trench
in traffic areas? Answer: 6 inches
,◉ measured from the finish grade what is the minimum burial depth
for the piping system of an underground tank and traffic areas?
Answer: 18 inches
◉ when planning your trenches for the piping system how much
slope toward the tank should be allowed for each linear foot of
piping? Answer: 1/8 inch
◉ excessive deflection of an installed tank particularly tanks made of
fiberglass reinforced plastic can create residual stress on the tank.
after you have measured the amount of deflection in a tank you have
just installed how do you determine if the deflection is acceptable?
Answer: check with the tank manufacture if the actual deflection
exceeds the limits established by that manufacturer
◉ what is the major cause of deflection in a newly-installed tank?
Answer: improper bedding
voids under the tank bottom
poor compaction of backfill material
◉ if both pea gravel and sand are used as backfill in the same
excavation what material should be used to prevent migration of
sand fines into voids in the pea gravel Answer: Filter Fabric
, ◉ if a bottom hold down pad is used as a means of anchoring the
tank what is the minimum distance the pad should extend beyond
the sides and ends of the tank? Answer: 18 inches Beyond each side
and 12 inches Beyond each end
◉ when installing a bottom hold down pad what should be the
proximity of the tank to the hold down pad? Answer: an adequate
bedding of backfill material must separate the tank and the pad.
◉ for purposes of making tank Anchorage calculations what is the
approximate weight of 1 cubic foot of sand or pea gravel? Answer:
60 pounds
◉ what is an acceptable minimum burial depth of cover for steel
underground tanks in traffic areas as specified in NFPA 30? Answer:
3 feet of Earth
◉ what is an acceptable minimum burial depth of cover required for
non-metallic underground tanks in traffic areas as specified in NFPA
30? Answer: 3 feet of Earth
◉ what are dead men anchors? Answer: beams of reinforced
concrete placed in the excavation with cables and or straps attached
CERTIFICATION EVALUATION 2026
COMPREHENSIVE QUESTIONS ANSWERS
◉ when installing dielectric bushings in a cathodically protected
steel tank prior to placing the tank in the excavation you should
Answer: make sure that no electric current can pass through the
dielectric flanges or bushings
◉ industry codes as well as the specifications of individual
manufacturers do not entirely agree as to the minimum space that
should be maintained between tanks and stalled in stable soil
conditions. what ranges of minimum spacing between tanks derived
from various industry codes and manufacture specifications which
range is most accurate. Answer: from 12 inches to 24 inches
◉ acceptable bedding material for steel tanks include.... Answer:
clean washed well granulated gravel sand or Rock between 1/8 inch
and 1/2 inch in size
pea gravel with a minimum diameter of 1/8 inch and a maximum
diameter of 3/4 inch
number 8 crushed stone
,◉ how should steel tanks should be lowered into the excavation
Answer: through the use of lifting lugs installed by the manufacture
and use of lifting equipment of sufficient capacity to lift and lower
the tank
◉ when installing a steel tank which has zinc anodes welded directly
onto the tank for cathodic protection you should Answer: remove
the plastic wrapping around the anodes prior to installation
◉ if local authorities and tank manufacturers permit a sand slurry
mixture to be used for backfilling a tank what steps should be taken
to ensure that use of the slurry is proper? Answer: use only
Personnel trained in the sand slurry method by the tank
manufacturer and use the method only with the manufacturer's
prior approval
◉ in making a tank excavation if you discover that the specific call
for the burial depth of the steel tank to be greater than the tank
diameter what should you do? Answer: consult the tank
manufacturer to determine if reinforcements will be required
◉ what is the minimum depth of bedding required for a pipe trench
in traffic areas? Answer: 6 inches
,◉ measured from the finish grade what is the minimum burial depth
for the piping system of an underground tank and traffic areas?
Answer: 18 inches
◉ when planning your trenches for the piping system how much
slope toward the tank should be allowed for each linear foot of
piping? Answer: 1/8 inch
◉ excessive deflection of an installed tank particularly tanks made of
fiberglass reinforced plastic can create residual stress on the tank.
after you have measured the amount of deflection in a tank you have
just installed how do you determine if the deflection is acceptable?
Answer: check with the tank manufacture if the actual deflection
exceeds the limits established by that manufacturer
◉ what is the major cause of deflection in a newly-installed tank?
Answer: improper bedding
voids under the tank bottom
poor compaction of backfill material
◉ if both pea gravel and sand are used as backfill in the same
excavation what material should be used to prevent migration of
sand fines into voids in the pea gravel Answer: Filter Fabric
, ◉ if a bottom hold down pad is used as a means of anchoring the
tank what is the minimum distance the pad should extend beyond
the sides and ends of the tank? Answer: 18 inches Beyond each side
and 12 inches Beyond each end
◉ when installing a bottom hold down pad what should be the
proximity of the tank to the hold down pad? Answer: an adequate
bedding of backfill material must separate the tank and the pad.
◉ for purposes of making tank Anchorage calculations what is the
approximate weight of 1 cubic foot of sand or pea gravel? Answer:
60 pounds
◉ what is an acceptable minimum burial depth of cover for steel
underground tanks in traffic areas as specified in NFPA 30? Answer:
3 feet of Earth
◉ what is an acceptable minimum burial depth of cover required for
non-metallic underground tanks in traffic areas as specified in NFPA
30? Answer: 3 feet of Earth
◉ what are dead men anchors? Answer: beams of reinforced
concrete placed in the excavation with cables and or straps attached
