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API 653 RECERTIFICATION QUIZ 2026
100% PASS ASSURED EXAMINATION
SOLUTIONS
Per API 653 , with of the following is
required when converting an existing tank to
operation at elevated temperatures when it was
not originally designed and constructed to API
650, Appendix M? - correct answer- The Shell
to bottom joint shall be evaluated for fatigue
When removing an existing tank bottom, all
arc-gouged areas of the tank shell-to-bottom
shall be: - correct answer- examined using
magnetic particle inspection, and defective
areas repaired and re-examined.
If RBI assessment has been conducted and the
tank has cathodic protection plus a thin-film
lining, the maximum inspection interval is: -
correct answer- 14 years
When installing a new nozzle in a tank of
unknow material, what stress value should be
used to calculate the required shell thickness
and reinforcement? - correct answer- 20,000
lbf/in2
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In regards to underside corrosion on tank
bottoms, the corrosion rate of steel in a wet
environment. - correct answer- may double with
every 18 °F increase in temperature above 77
°F.
Grade 350W/50W is acceptable for tank plate to
a maximum thickness of: - correct answer- 45mm
(1.75in) if fully killed and made to a fine
grain practice.
If an RBI assessment has been conducted and
the tank has a release prevention barrier, the
maximum initial inspection interval is: -
correct answer- 25 years
As an alternative to the procedures in API 653
for the evaluation of any thinning of the tank
shell below minimum required wall thickness
may be evaluated for continued service using
which code? - correct answer- API RP 579,
section 4, 5 or 6.
API 653 RECERTIFICATION QUIZ 2026
100% PASS ASSURED EXAMINATION
SOLUTIONS
Per API 653 , with of the following is
required when converting an existing tank to
operation at elevated temperatures when it was
not originally designed and constructed to API
650, Appendix M? - correct answer- The Shell
to bottom joint shall be evaluated for fatigue
When removing an existing tank bottom, all
arc-gouged areas of the tank shell-to-bottom
shall be: - correct answer- examined using
magnetic particle inspection, and defective
areas repaired and re-examined.
If RBI assessment has been conducted and the
tank has cathodic protection plus a thin-film
lining, the maximum inspection interval is: -
correct answer- 14 years
When installing a new nozzle in a tank of
unknow material, what stress value should be
used to calculate the required shell thickness
and reinforcement? - correct answer- 20,000
lbf/in2
, 2 | Page
In regards to underside corrosion on tank
bottoms, the corrosion rate of steel in a wet
environment. - correct answer- may double with
every 18 °F increase in temperature above 77
°F.
Grade 350W/50W is acceptable for tank plate to
a maximum thickness of: - correct answer- 45mm
(1.75in) if fully killed and made to a fine
grain practice.
If an RBI assessment has been conducted and
the tank has a release prevention barrier, the
maximum initial inspection interval is: -
correct answer- 25 years
As an alternative to the procedures in API 653
for the evaluation of any thinning of the tank
shell below minimum required wall thickness
may be evaluated for continued service using
which code? - correct answer- API RP 579,
section 4, 5 or 6.
