U1 UST Installation/Retrofitting Exam Questions And Answers Verified 100% Correct

U1 UST Installation/Retrofitting Exam Questions And Answers Verified 100% Correct Carefully inspect _______________ and __________________ surfaces of a tank shipped with a liquid-filled interstice for signs of leakage - ANSWER Interior, exterior 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 . To avoid undermining foundations of existing structures excavation must be done - ANSWER A. Carefully B. Tentatively C. Quickly D. Efficiently ANSWER A 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 Much of a buried tanks support is derived from __________ - ANSWER A. Compacted backfill B. Chain-falls C. Reinforced steal walls D. Concrete ANSWER A _______ ____________ are geotextiles designed to prevent movement of back-fill materials, while permitting water to pass through - ANSWER Filter fabrics 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 . ___ 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 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 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 . For fiberglass tanks ______ feet is the standard max depth for the tank - ANSWER 7 ________ feet is the typical burial depth for steel tanks - ANSWER 5 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 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 - - i B. A Morph s C. Egregious D. Free flowing ANSWER D 58 - ANSWER A. Stagnate . Cover the bottom of the excavation with suitably graded and properly placed back fill material to a depth of at least _________ Foot/feet deep B. 1 foo t C. 1.5 Fee t D. 2 Fee ANSWER B - ANSWER A. 0.5 Foot t 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