KENTUCKY UST EXAM SCRIPT 2025/2026 QUESTIONS
WITH ANSWERS MARKED A+
✔✔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. - ✔✔from 12 inches to 24 inches
✔✔acceptable bedding material for steel tanks include.... - ✔✔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 - ✔✔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 - ✔✔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? - ✔✔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? - ✔✔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? -
✔✔6 inches
✔✔measured from the finish grade what is the minimum burial depth for the piping
system of an underground tank and traffic areas? - ✔✔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? - ✔✔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? - ✔✔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? - ✔✔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 -
✔✔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? -
✔✔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? - ✔✔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? - ✔✔60 pounds
✔✔what is an acceptable minimum burial depth of cover for steel underground tanks in
traffic areas as specified in NFPA 30? - ✔✔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? - ✔✔3 feet of Earth
✔✔what are dead men anchors? - ✔✔beams of reinforced concrete placed in the
excavation with cables and or straps attached
✔✔in dry areas where tank floatation is not a problem and which are not subject to
traffic what is the minimum depth of cover recommended? - ✔✔1 foot of backfill material
plus four inches of reinforced concrete
and/or
1 foot of backfill covered by Filter Fabric and 1 foot of Earth
, ✔✔mid anchoring is a method of? - ✔✔of preventing tank flotation by pouring reinforced
concrete over the top 1/3 of the tank with a membrane of non conductive material
separating the concrete from the tank
✔✔for steel and FRP and FRP clad tanks the bottom of the excavation should be
covered with a bedding of backfill material to a depth of at least? - ✔✔1 foot
✔✔if they hold down pad is used in the bottom of the excavation the betting may be
reduced to a depth of? - ✔✔6 inches
✔✔native soil may be used as a backfill for tanks when? - ✔✔never. Naitive soil is
unacceptable as a backfill material
✔✔the preferred backfill material for fiberglass reinforced plastic tanks is what? -
✔✔pea gravel with a minimum diameter of 1/8 inch and a maximum diameter of 3/4
inch
✔✔the recommended backfill material for steel or fiberglass clad steel tanks may be all
but one of the following materials which is NOT accepted as backfill
sand?
compacted clay?
pea gravel?
crushed rock? - ✔✔compacted clay is not acceptable as backfill
✔✔use of sand slurry as a controlled mixture of sand and water may be permitted for
backfilling a tank excavation provided what? - ✔✔the operation is performed only by
personnel trained by the tank manufacturer and with the tank manufacturers prior
approval.
✔✔compaction of bedding and backfill materials is essential for what reason? -
✔✔compaction ensures proper support of the tank and prevents its movement or
settlement.
✔✔a Filter Fabric should be installed between the backfill and adjacent unstable soils
Bob's schwabe areas or landfills why? - ✔✔to prevent the backfill from migrating in this
diminishing support of the tank or Paving.
✔✔is sand and pea gravel are used in the same excavation they should be separated
with Filter Fabric in order to? - ✔✔prevents sand fines from migrating into the voids
between the pea gravel particles
WITH ANSWERS MARKED A+
✔✔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. - ✔✔from 12 inches to 24 inches
✔✔acceptable bedding material for steel tanks include.... - ✔✔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 - ✔✔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 - ✔✔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? - ✔✔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? - ✔✔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? -
✔✔6 inches
✔✔measured from the finish grade what is the minimum burial depth for the piping
system of an underground tank and traffic areas? - ✔✔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? - ✔✔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? - ✔✔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? - ✔✔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 -
✔✔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? -
✔✔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? - ✔✔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? - ✔✔60 pounds
✔✔what is an acceptable minimum burial depth of cover for steel underground tanks in
traffic areas as specified in NFPA 30? - ✔✔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? - ✔✔3 feet of Earth
✔✔what are dead men anchors? - ✔✔beams of reinforced concrete placed in the
excavation with cables and or straps attached
✔✔in dry areas where tank floatation is not a problem and which are not subject to
traffic what is the minimum depth of cover recommended? - ✔✔1 foot of backfill material
plus four inches of reinforced concrete
and/or
1 foot of backfill covered by Filter Fabric and 1 foot of Earth
, ✔✔mid anchoring is a method of? - ✔✔of preventing tank flotation by pouring reinforced
concrete over the top 1/3 of the tank with a membrane of non conductive material
separating the concrete from the tank
✔✔for steel and FRP and FRP clad tanks the bottom of the excavation should be
covered with a bedding of backfill material to a depth of at least? - ✔✔1 foot
✔✔if they hold down pad is used in the bottom of the excavation the betting may be
reduced to a depth of? - ✔✔6 inches
✔✔native soil may be used as a backfill for tanks when? - ✔✔never. Naitive soil is
unacceptable as a backfill material
✔✔the preferred backfill material for fiberglass reinforced plastic tanks is what? -
✔✔pea gravel with a minimum diameter of 1/8 inch and a maximum diameter of 3/4
inch
✔✔the recommended backfill material for steel or fiberglass clad steel tanks may be all
but one of the following materials which is NOT accepted as backfill
sand?
compacted clay?
pea gravel?
crushed rock? - ✔✔compacted clay is not acceptable as backfill
✔✔use of sand slurry as a controlled mixture of sand and water may be permitted for
backfilling a tank excavation provided what? - ✔✔the operation is performed only by
personnel trained by the tank manufacturer and with the tank manufacturers prior
approval.
✔✔compaction of bedding and backfill materials is essential for what reason? -
✔✔compaction ensures proper support of the tank and prevents its movement or
settlement.
✔✔a Filter Fabric should be installed between the backfill and adjacent unstable soils
Bob's schwabe areas or landfills why? - ✔✔to prevent the backfill from migrating in this
diminishing support of the tank or Paving.
✔✔is sand and pea gravel are used in the same excavation they should be separated
with Filter Fabric in order to? - ✔✔prevents sand fines from migrating into the voids
between the pea gravel particles
