U3 ICC Tank Tightness Testing 2025/2026 Exam Questions With Correct Detailed Answers ||100% Guaranteed Pass <Brand New Version>

U3 ICC Tank Tightness Testing 2025/2026 Exam Questions With Correct Detailed Answers ||100% Guaranteed Pass &lt;Brand New Version&gt; 1. With an acoustical non-volumetric test, all the following are true except: a. Does not provide a leak rate b. Potential increase in leak during the test period c. If the nitrogen pressure exceeds the tank's normal operating pressure there is a risk of rupture d. The measured leak rate can be masked by a high water table. - ANSWER d. The measured leak rate can be masked by a high water table. 2. When a tracer chemical, such as helium, is used to pressurize an empty tank which test variable is most likely to mask a leak? a. Water table b. Vapor pocket c. Atmospheric pressure changes d. Temperature change - ANSWER a. Water table 3. A tank shipped with an interstice on which a vacuum is drawn: a. Must still have a soap water test of the entire exterior surface to check for potential leaks before it is installed b. Need not be subjected to the pre installation air/soap test provided the tank arrives within limits designed by the manufacturer c. Must be hydrostatically tested before installation d. Must have the vacuum increased to 15 Hg of vacuum for a period no less than 1 hour and not decay beyond manufacturers allowable pressure loss. - ANSWER b. Need not be subjected to the pre installation air/soap test provided the tank arrives within limits designed by the manufacturer 4. Prior to installing a 8' diameter double wall tank, the inner tank must be pressurized to a maximum of _____ psig for a period of ____ hour(s). a. 3, 1 b, 3, 24 c. 5, 1 d. 5, 24 - ANSWER c. 5, 1 5. The proper procedure for pressurizing a double walled tank includes: a. Pressurizing the interstice before pressurizing the primary tank to conduct a soap water test first. b. Pressurizing the primary tank and the interstice immediately afterwards c. Pressurizing the primary tank and the interstice following the recommended test duration d. Pressurizing the primary tank and interstice simultaneously to avoid causing damage to either tank wall. - ANSWER c. Pressurizing the primary tank and the interstice following the recommended test duration 6. The P.E.L. for benzene exposure is ___ ppm in an 8hour period or ___ ppm in 15 minutes max. - ANSWER 1 & 5 7. At what exposure level does benzene cause molecular change to the blood? - ANSWER d. 25 ppm 8. An eductor is used to vapor free a tank. How tall does the exhaust need to be? - ANSWER 12 feet 9. While pressure washing a tank, the wand should be: - ANSWER Electrically bonded to the tank 10. Flammable liquids (class 1) are defined as having: a. A flash point of less than 100 degrees Celsius b. A flash point of 100 degrees Fahrenheit or more c. A flash point of less than 100 degrees Fahrenheit - ANSWER c. A flash point of less than 100 degrees Fahrenheit 11. Gasoline vapors are: a. Lighter than air b. Heavier than air - ANSWER b. Heavier than air 12. Gasoline vapors are defined as having: a. Low vapor pressure and high flash point b. High vapor pressure and high flash point c. High vapor pressure and low flash point d. Low vapor pressure and low flash point - ANSWER c. High vapor pressure and low flash point