UST Certification Study Guide 2022/2023 Solved 100% Correct
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When tanks arrive at the job site, how should they be unloaded? - ANSWER-Lifted off with a cable attached to the tank lifting lugs.
As an alternative lifting method, should a cable or chain be wrapped around the tank? - ANSWER-No, Never.
When you are lifting a tank, using the lifting lugs, wh...
UST Certification Study Guide 2022/2023
Solved 100% Correct
When tanks arrive at the job site, how should they be unloaded? - ANSWER-Lifted off with a cable attached to the tank lifting lugs.
As an alternative lifting method, should a cable or chain be wrapped around the tank? - ANSWER-No, Never.
When you are lifting a tank, using the lifting lugs, which of these procedures should be followed? - ANSWER-Attach a triangle cable through the lugs, with not more than a 30-
degree angle from the center line.
After you unload a new tank on a clean, level surface at the job site, what else would you do prior to inspection and pretesting? - ANSWER-Chock the tank to prevent it from rolling.
Which of the following items should be physically check for damage or imperfections at the job site? - ANSWER-- Piping (steel and fiberglass).
- Fittings, vents, fill-boxes, anodes, etc.
- The tanks themselves.
Sti-P3 tanks are delivered with shipping plugs in tank openings. What should be done to
these plugs prior to testing? - ANSWER-Remove the plugs and replace them with standard threaded plugs, properly doped.
Should dielectric bushings be installed in all openings of a sti-P3 tank? - ANSWER-Yes.
All openings.
What is the maximum air pressure to which a steel tank should be subjected in a pre-
installation test? - ANSWER-5 Pounds
For fiberglass reinforced plastic (FPR) tanks, up to 12 feet in diameter, what is an acceptable air pressure to which the tanks may be subjected in a pre-installation test? - ANSWER-3 Pounds
For FRP tanks over 12 feet in diameter, what is the maximum air pressure to which the tanks should be subjected in a pre-installation test? - ANSWER-3 Pounds
When you are conducting an air test on a tank, the type of gauge that should be used is...? - ANSWER-A pressure gauge with a maximum limit of 10-15 psig.
When conducting a pre-installation air test on a new single wall tank... - ANSWER-Soap
the surface of the tank and observe any air bubbles in the soap. The proper procedure for conducting a pre-installation air test of a steel tank is to... - ANSWER-Apply 3 to 5 pounds of air pressure and soap all surfaces and weld seams visible through the coating, while inspecting for bubbles.
The proper procedure for conducting a pre-installation air test of an FRP tank, under 12 feet in diameter, is to... - ANSWER-Apply 3 pounds of air pressure and soap all surfaces, while inspecting for any sign of a leak, either audible or visible in the form of bubbles on the surface.
The proper procedure for conducting a pre-installation air test of a double-walled tank is to... - ANSWER-Pressurize the inner tank, monitor the pressure for 1 hour, and then pressurize the space between the inner and outer tanks with air from the inner tank.
When conducting a pre-installation air test on a double-walled tank, which of the following is correct? - ANSWER-Release pressure on the outer tank (interstice) first, then release the pressure on the inner tank, after the test is completed.
When shipped, a steel tank is covered with a coating that is an important part of the tank's corrosion prevention system. "Holidays" which show up in the coating at the installation site... - ANSWER-Should be touched up with a compatible coating, after proper surface preparation.
Touch up of "holidays" in steel tank coatings, at the installation site, should be done... - ANSWER-According to the manufacturer's instructions.
Dielectric bushings are usually made of... - ANSWER-Nonmetallic material.
Factors to consider in determining the size, shape, and depth of a tank excavation include... - ANSWER-- The tank manufacturer's recommendations.
- Requirements for compacting bedding and backfill, as well as stability of the soil.
- Depth of cover.
In the absence of local requirements, the recommended minimum distance between a tank excavation and adjacent structures or property lines is - ANSWER-5 feet.
Reinforcement of a steel underground tank may be required by the tank manufacturer if... - ANSWER-The burial depth is greater than the tank diameter.
According to FRP tank manufacturers' specifications, the burial depth for an FRP tank should not exceed... - ANSWER-7 feet.
Ballast, whether water or fuel, should be added to the tank at what stage of the installation? - ANSWER-After the tank has been backfilled to the top of the tank.
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