U1 UST Installation/Retrofitting Exam Questions and Answers | Verified and Updated 2026 | Guaranteed Pass

U1 UST Installation/Retrofitting Exam Questions and Answers | Verified and Updated 2026 | Guaranteed Pass 1. One of the significant causes of leaks in underground liquid storage systems is ____________ ________________ - answer-Improper Installation 2. Written Plans are required to - answer-obtain permits, solicit bids, and provide precise guidance for installers. 3. The plans should - answer-Describe the property, identify the size and location of the tanks, indicate the liquids to be stored and provide the location of the dispensers and piping. 4. Storage systems discussed in this recommended practice are usually regulated by - answerFederal, state or local agencies. 5. All owners should ensure that the equipment to be installed meets - answer-applicable regulatory requirements before being installed 6. Consult the local authorities who have jurisdiction in the area before storage-system plans are - answer-finalized or construction is initiated. 7. All owners should ensure that the equipment to be installed meets all applicable regulatory requirements before - answer-Being installed.8. To avoid damage tanks must not be - answer-dropped, dragged, or handled with sharp objects. 9. Tanks must not be dropped, dragged, or handled with sharp objects to avoid - answerDamage to the tank 10. The only time tanks really should be moved is when - answer-for inspections and testing. 11. If a tanks is damaged at all throughout the moving process it must be - answer-Repaired in accordance with the manufacture's instructions. 12. The proper way to move a tank is by lifting it, using the - answer-Lift lugs that are installed by the manufacturer. 13. Tanks should be carefully lifted and lowered using - answer-Cables or chains of adequate length. 14. When two lifting lugs are being used, the angle between the lifting cable and vertical should be no more than - answer-30 degrees. 15. Stockpile piping materials and equipment in a _____________ _________ on the job site - answer-Secure area 16. Confirm adherence to specifications by reporting to the owner about any - answer-detected damage that could result in leakage or premature corrosion. 17. Pressure test single-walled tanks with _____ to _______ psig air pressure, soaping all surfaces, seams and fittings while inspecting for bubbles. - answer-3 to 518. Air testing with over ___ psig (3 Psig for 12-Ft. Diameter FRP tanks) is hazardous and may damage the tank - answer-5 psig 19. Do not air test a tank that has previously contained - answer-flammable or combustible liquids 20. Place ______ barricades at the ends of tanks being tested. - answer-Warning 21. Avoid tank ends, man-ways, and fittings while the tank is under - answer-Pressure 22. Release pressure in the tank before disconnecting any - answer-gauges or test fittings. 23. Be aware some manufactures do not tighten fittings to allow for _____________ _____________ during shipping and storage. - answer-Temperature changes 24. True or False: Air tests are inconclusive without soaping and careful inspection for bubbles? - answer-True 25. Tanks gauges must have a scale that will permit detection of small changes in __________ that might go undetected on gauges with a ___________ _________. - answer-Pressure, broader range. 26. Since the best accuracy of gauges is at mid-range, and test pressures must not exeed 5 psig, use a gauge with a maximum limit of ____ or ______ - answer-10 or 15 psig 27. Check the gauges __________ and _________ before use - answer-operation and accuracy28. Underground storage systems may include vapor-recovery - answer-Piping and equipment 29. What can cause premature storage-system failures _________ - answer-Debris and other foreign materials 30. Tank installers should have gone through training programs to improve their skills and insure the install is __________ - answer-Successful 31. __________ kinds of plans are required to obtain permits, solicit bids, and provide precise guidance for installers - answer-written 32. ___________________ should insure that the equipment to be installed meets all applicable regulatory requirements before beginning an installation - answer-Owners 33. Tanks should be ___________ inspected before installation - answer-Visually 34. 2 Gauges should be used to reduce ___________ ____________ - answer-gauge failure 35. A pressure-relief device should e used to prevent _______________ ____________ - answer-Over pressurization 36. True of False: Over pressurization could be a result of temperature changes - answer-True 37. To avoid damaging the interstitial space between tank walls from over-pressurization, avoid pressurizing the inner tank to a maximum of______ psig - answer-5 psig 38. Double wall tanks pressure should be monitored for _____ hour - answer-139. If a compartment has single walled bulkheads, test the compartments on ___________ ___________ of the same bulkhead at different times. - answer-A. Opposite sides B. Different sides C. Adjacent sides D. Congruent sides Answer B 40. If the compartmented tank has double-walled bulkheads, compartments may be tested at the _____________ __________ - answer-A. First time B. Second time C. Same time D. Last time Answer C 41. Carefully inspect _______________ and __________________ surfaces of a tank shipped with a liquid-filled interstice for signs of leakage - answer-Interior, exterior 42. A double-walled tank shipped with a _____________ on the interstice need not be subjected to an air/soap test. - answer-A. Ballard B. Gauge C. Skid D. Vacuum Answer D 43. To avoid undermining foundations of existing structures excavation must be done - answerA. Carefully B. TentativelyC. Quickly D. Efficiently Answer A 44. What is the determinant of the total depth of the tank excavation. - answer-A. Tank diameter, bedding-thickness, hold-down pad(If required), depth of cover, and slope and length of piping. B. Slope and length of piping, depth of cover, hold down pad(If required), thickness, amount of dirt C. Thickness, hold-down pad(If required), depth of cover, bedding, previous leaks or spills D. Slope and length of piping, thickness, amount of dirt, depth of cover, bedding, thickness. Answer A 45. Much of a buried tanks support is derived from __________ - answer-A. Compacted backfill B. Chain-falls C. Reinforced steal walls D. Concrete Answer A 46. _______ ____________ are geotextiles designed to prevent movement of back-fill materials, while permitting water to pass through - answer-Filter fabrics47. To provide a firm foundation for the tank, set the tank on a bed of ___________ material one foot thick that extends one foot beyond the ends and sides of the tank. - answer-backfill 48. ___ feet of backfill must be placed between adjacent tanks and between tanks and excavation walls. - answer-A. 1 B. 2 C. 3 D. 4 Answer B 49. In areas subject to vehicle traffic, cover may consist of at least _________ inches of compacted backfill and ________ inches of asphaltic concrete, or___________ inches of reinforced concrete - answer-30, 6, 18 50. Maximum burial depth, measured from the top of the tank, are established by tank __________ and ________________ - answer-A. Manufacturers and the installers B. Independent testing laboratories C. Installers and independent testing labs D. Installers and the tank owner E. Manufacturers F. Both B and E Answer F 51. For fiberglass tanks ______ feet is the standard max depth for the tank - answer-7 52. ________ feet is the typical burial depth for steel tanks - answer-553. Excavated materials that cannot be immediately removed from the site should be safely stockpiled at least _______ feet away from the edge of the tank excavation - answer-2 54. Common deficiencies that adversely affect the structural integrity and coating of tanks include - answer-A. use of incorrect backfill material B. Inadequate or improper placement or compaction of backfill materials C. rocks of debris left in the excavation D. Voids under the lower quadrant of the tank E. Failure to prevent migration of backfill materials F. All of the above Answer F 55. If a product is used for ballast do not fill tank about _______ percent ? - answer-95 56. Water in a storage tank can promote internal _____________ and degrade fuel quality. - answer-Corrosion 57. Back fill material should be - answer-A. Stagnate B. A-Morph-is C. Egregious D. Free flowing Answer D 58. Cover the bottom of the excavation with suitably graded and properly placed back fill material to a depth of at least _________ Foot/feet deep - answer-A. 0.5 Foot B. 1 foot C. 1.5 FeetD. 2 Feet Answer B 59. What are the standard back fill materials for a fiberglass tank. - answer-A. pea gravel and crushed rock B. pea gravel and dirt C. pea gravel and water D. sawdust and pea gravel Answer A 60. When dealing with a fiberglass tank the bottom of the excavation or hold-down pad must be covered with a minimum of ______ foot/ feet of suitably graded and compacted back fill material. - answer-A. 10 B. 3 C. 1 D. 2 Answer C 61. Place sand and back fill into the excavation in twelve to eighteen inch lifts and compact after each lift. Repeat this process up to at least _________ % of the tank. - answer-A. 60 B. 65 C. 55 D. 70 Answer A 62. During construction the tank should not be used to support - answer-A. Cribbing B. BracingC. Blocking D. All of the above Answer D 63. A ______________ should be used where installation are located in areas subject to high water tables of flooding. - answer-Anchoring 64. During installation, tank vents and other openings that are not liquid-tight should be extended above the ____________ flood-stage water level until piping is complete. - answerMaximu