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MS closed book Practice Test Questions and Answers 100% Pass

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  • Api 653
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  • Api 653

MS closed book Practice Test Questions and Answers 100% Pass API 653 covers the following activity? A. Tank design B. Tank fabrication C. Tank operation D. Tank reconstruction - D. Tank reconstruction Corroded roof plates on a fixed roof tank shall not be less than? - .09" thick average ove...

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  • January 10, 2025
  • 15
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Api 653
  • Api 653
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EmilyCharlene
MS closed book Practice Test
Questions and Answers 100% Pass

API 653 covers the following activity?


A. Tank design


B. Tank fabrication


C. Tank operation


D. Tank reconstruction - ✔✔D. Tank reconstruction


Corroded roof plates on a fixed roof tank shall not be less than? - ✔✔.09" thick average

over any 100 square inches.


A new nameplate shall be added to a tank after? - ✔✔It has been reconstructed.


For a reconstructed tank, the shell thickness readings used to determine the allowed

liquid height must have been taken within the last? - ✔✔180 days


Pitting has been found on the shell. Corrective action must take place when the? -

✔✔Remaining thickness is less than 50% of Tmin.


What is the Critical Zone? - ✔✔The bottom within 3" of the shell.




EMILY CHARLENE © 2025, ALL RIGHTS RESERVED 1

, A tank is 20 years old and has a bottom thickness of .170". Original bottom thickness

was .250". Determine the interval for the next internal inspection. - ✔✔17.5 years


Widely scattered pits in a tank shell can be ignored if the extent of the pitting does not

exceed: - ✔✔2" in any vertical 8"


Which of the following is an advantage of a sacrificial anode type of cathodic

protection? - ✔✔Annual maintenance costs are generally low.


In what section of the tank are hot taps permitted? - ✔✔Only in the liquid section of the

tank.


An API 653 hydro test shall be held at least: - ✔✔24 hours


During an API repair, if API 653 conflicts with the design standard, which standard

governs? - ✔✔API 653


Which of the following activities is considered an alteration in API 653? - ✔✔The

addition of a 16 NPS nozzle.


Repaired of replaced bottom welds shall be examined with either a vacuum box or by

using: - ✔✔A tracer gas test.


Weld procedures for tank repairs shall be qualified according to: - ✔✔Section IX


A lap patch is installed on a tank bottom and the patch plate extends across a tank

bottom weld. What is the minimum dimension for this patch plate? - ✔✔12 inches




EMILY CHARLENE © 2025, ALL RIGHTS RESERVED 2

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