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API 653 RECERTIFICATION QUIZ QUESTIONS AND ANSWERS 2024
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API 653 RECERTIFICATION QUIZ QUESTIONS AND ANSWERS 2024
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API 653 RECERTIFICATION QUIZMinimum 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
Holiday testing of thin-film linings should be performed with? - ANSWERS-Low
voltage wet sponge detector
, Anchor bolts that's have distortions or excessive cracking may be indications of: -
ANSWERS-Serious foundation settlement or a Tank overpressure uplift condition.
what happen when concrete has been exposed to sufficiently high temperature
for a period of time. - ANSWERS-Loss of water of hydration (Calcining)
The permeability of a leak detection barrier shall not exceed - ANSWERS-1 × 10-7
cm (4 × 10-5 mils) per second
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? - ANSWERS-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: - ANSWERS-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: - ANSWERS-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? -
ANSWERS-20,000 lbf/in2
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