API 653 RECERTIFICATION (ACTUAL 2025/2026) QUIZ
QUESTIONS WITH VERIFIED 100% CORRECT ANSWERS.
During welding operations the inspector should confirm - ----
-Answers----The welding parameters are supported by the
WPS and WPQ
If a release prevention system utilizing a nonconductive,
impervious external liner is installed under a new tank, what
should be done? - -----Answers----Anodes shall be placed
between the external liner and the tank bottom in a conductive
material.
The activity that is used to a currently determine the remaining
bottom thickness in areas where indications are found it is
called? - -----Answers----Sizing (Proc up)
Minimum dimension of a shell flash patch? - -----Answers---
-12"
Max size of shell Lap-patch? - -----Answers----48"x72"
Minimum repair plate dimension? - -----Answers----4"
The likelihood of caustic stress corrosion cracking can be
reduce by: - -----Answers----Stress relieving
, Scribe the flexible joint across the two moving faces and raise
end of swing line to check? - -----Answers----Joints freedom
of movement
Minimum size of bottom lap-patch that does not cross a
bottom seam? - -----Answers----6"
Minimum amount of shell UT on shell plate? - -----Answers--
--At least 5 equally spaud areas for UT.
On fixed roof, planks long enough to span at least - -----
Answers----Two roof raffer
At what PH does a thin iron sulfide layer deposit on the steel
and provides some protection to corrosion - -----Answers---
-> 4.5
Max Temperature for Coal tar Epoxy - -----Answers----120F
to 170F
where gas-tight roofs are required - -----Answers----Leak
testing may be accomplished
The present of clay, wood, gravel, or crushed stores as
contaminants in a sand pad may cause - -----Answers----
Pitting corrosion at each point of contact
QUESTIONS WITH VERIFIED 100% CORRECT ANSWERS.
During welding operations the inspector should confirm - ----
-Answers----The welding parameters are supported by the
WPS and WPQ
If a release prevention system utilizing a nonconductive,
impervious external liner is installed under a new tank, what
should be done? - -----Answers----Anodes shall be placed
between the external liner and the tank bottom in a conductive
material.
The activity that is used to a currently determine the remaining
bottom thickness in areas where indications are found it is
called? - -----Answers----Sizing (Proc up)
Minimum dimension of a shell flash patch? - -----Answers---
-12"
Max size of shell Lap-patch? - -----Answers----48"x72"
Minimum repair plate dimension? - -----Answers----4"
The likelihood of caustic stress corrosion cracking can be
reduce by: - -----Answers----Stress relieving
, Scribe the flexible joint across the two moving faces and raise
end of swing line to check? - -----Answers----Joints freedom
of movement
Minimum size of bottom lap-patch that does not cross a
bottom seam? - -----Answers----6"
Minimum amount of shell UT on shell plate? - -----Answers--
--At least 5 equally spaud areas for UT.
On fixed roof, planks long enough to span at least - -----
Answers----Two roof raffer
At what PH does a thin iron sulfide layer deposit on the steel
and provides some protection to corrosion - -----Answers---
-> 4.5
Max Temperature for Coal tar Epoxy - -----Answers----120F
to 170F
where gas-tight roofs are required - -----Answers----Leak
testing may be accomplished
The present of clay, wood, gravel, or crushed stores as
contaminants in a sand pad may cause - -----Answers----
Pitting corrosion at each point of contact
