U1 UST INSTALLATION RETROFITTING EXAM SCRIPT
2025/2026 QUESTIONS WITH ANSWERS GRADED A+
✔✔101. Run piping in a single trench between the tank area and the
________________ and between the tank and vent risers. - ✔✔A.Dispensing
B. Retrofitting
C. Convoy
D. Interstitial-spacing
Answer A.
✔✔102. Provide at least ____in of clearance between piping and electrical conduit,
utilities, other system components, and any nearby structures - ✔✔A. 12
B. 13
C. 4
D. 6
Answer D.
✔✔103. In traffic areas, ensure that the trench is sufficiently deep to permit ______in of
bedding and at least _______in of compacted back-fill material and pavement above
the top of the pipe. - ✔✔A. 18,6
B. 6,18
C. 8, 16
D. 12, 8
Answer B.
✔✔104. Carefully grade and compact bedding to ensure a minimum slope of ______in
per foot toward the tank for vapor, vent, gravity fill, and suction supply lines. In
pressurized systems, slope may not be necessary. - ✔✔A. 1/6
B. 1/18
C. 100
D. 2/8
Answer A
✔✔105. For safe ___________ piping configurations, the entire piping run must slope
down to the tank, allowing product to drain safely if air should enter - ✔✔A. Re-bar
B. Continuous
C. Suction
D. Dilated
answer C
✔✔106. Use clean sand or pea gravel 3/4" max or crushed rock 1/2" max for piping
back fill material. Remove any chocks or bracing beforehand - ✔✔A. 3/4
B. 4/3
C. 2/6
, D. 4/8
Answer A
✔✔107. Clearly mark trenches and protect them during construction to prevent damage
to _____________ from traffic, excavation, grade stakes, or other construction
conditions. Use tracer tape. - ✔✔A. Excavation
B. Back-fill
C. Piping
D. Stakes
Answer C
✔✔108. Flexible connectors may be installed at the tank end of each product line,
____________, and vapor-recovery line, and at the base of dispensers. - ✔✔A. Fill
housing
B. Tank basin
C. Interstitial-spacing
D. A and C
E. None of the above
Answer E
✔✔109. Do not twist or kink flexible connectors nor bend the __________ past
manufacturer's recommendations. - ✔✔A. Hypotenuse
B. Radius
C. Apex
D. Parabola
Answer B.
✔✔110. Do not interchange piping and couplings from different ______________ -
✔✔A. Locations
B. Sites
C. Manufacturers
D. Friends
Answer C.
✔✔111. Ensure that both primary and secondary piping consist of _____________
lengths between containment sumps. - ✔✔A. Miscellaneous
B. Continuous
C. Different
D. None of the above\
Answer B
✔✔112. Pay attention to ___________ ____________ and trenching requirements. -
✔✔A. Horizontal radius
B. Vertical radius
C. Congruent radius
2025/2026 QUESTIONS WITH ANSWERS GRADED A+
✔✔101. Run piping in a single trench between the tank area and the
________________ and between the tank and vent risers. - ✔✔A.Dispensing
B. Retrofitting
C. Convoy
D. Interstitial-spacing
Answer A.
✔✔102. Provide at least ____in of clearance between piping and electrical conduit,
utilities, other system components, and any nearby structures - ✔✔A. 12
B. 13
C. 4
D. 6
Answer D.
✔✔103. In traffic areas, ensure that the trench is sufficiently deep to permit ______in of
bedding and at least _______in of compacted back-fill material and pavement above
the top of the pipe. - ✔✔A. 18,6
B. 6,18
C. 8, 16
D. 12, 8
Answer B.
✔✔104. Carefully grade and compact bedding to ensure a minimum slope of ______in
per foot toward the tank for vapor, vent, gravity fill, and suction supply lines. In
pressurized systems, slope may not be necessary. - ✔✔A. 1/6
B. 1/18
C. 100
D. 2/8
Answer A
✔✔105. For safe ___________ piping configurations, the entire piping run must slope
down to the tank, allowing product to drain safely if air should enter - ✔✔A. Re-bar
B. Continuous
C. Suction
D. Dilated
answer C
✔✔106. Use clean sand or pea gravel 3/4" max or crushed rock 1/2" max for piping
back fill material. Remove any chocks or bracing beforehand - ✔✔A. 3/4
B. 4/3
C. 2/6
, D. 4/8
Answer A
✔✔107. Clearly mark trenches and protect them during construction to prevent damage
to _____________ from traffic, excavation, grade stakes, or other construction
conditions. Use tracer tape. - ✔✔A. Excavation
B. Back-fill
C. Piping
D. Stakes
Answer C
✔✔108. Flexible connectors may be installed at the tank end of each product line,
____________, and vapor-recovery line, and at the base of dispensers. - ✔✔A. Fill
housing
B. Tank basin
C. Interstitial-spacing
D. A and C
E. None of the above
Answer E
✔✔109. Do not twist or kink flexible connectors nor bend the __________ past
manufacturer's recommendations. - ✔✔A. Hypotenuse
B. Radius
C. Apex
D. Parabola
Answer B.
✔✔110. Do not interchange piping and couplings from different ______________ -
✔✔A. Locations
B. Sites
C. Manufacturers
D. Friends
Answer C.
✔✔111. Ensure that both primary and secondary piping consist of _____________
lengths between containment sumps. - ✔✔A. Miscellaneous
B. Continuous
C. Different
D. None of the above\
Answer B
✔✔112. Pay attention to ___________ ____________ and trenching requirements. -
✔✔A. Horizontal radius
B. Vertical radius
C. Congruent radius
