A weld-on patch plate used for repairing a tank bottom shall? correct answersNever be placed over an area of global dishing.
New welds attaching existing shell plates to existing or new shell plates should follow what two inspection methods? correct answersVisual and RT
When a tank bottom is ...
A weld-on patch plate used for repairing a tank bottom shall? correct answersNever be placed over an
area of global dishing.
New welds attaching existing shell plates to existing or new shell plates should follow what two
inspection methods? correct answersVisual and RT
When a tank bottom is removed by using arc-gauging, the areas of the tanks shell-to- bottom weld shall
be? correct answersMagnetic-particle examined and defective areas repaired and re-examined
At what frequency shall visible and fluorescent light meters used with liquid penetrant testing be
calibrated. correct answersA min. of once a year.
Fitness for service evaluations may be used to exempt a repair from hydrostatic testing if performed by
a? correct answersEngineer experienced in tank design and evaluation methodologies used.
Flame arrestors should be inspected when? correct answersAt appropriate intervals.
When corrosion is found on the underside of a tank roof and the top side of the tank shell, structural
members such as roof girders and rafters will most likely be thinning at what rate? correct answersTwice
the rate of the roof or shell.
Assessment of internal tank settlement requires placement of measurement points across the tank
diameter at intervals of not more than? correct answers10 feet
In a API standard 653 repair a replacement plate meets but does not cross a horizontal weld. prior to
welding of a new vertical joint the horizontal weld should be cut beyond the new vertical joint at min.
length of? correct answers12 inches
, Surface prep, anchor patterns typically required for coatings are generally how many mils. deep? correct
answers1.5-4 Mils.
A limitation of PT is that standard penetrant systems are limited to welds having a max temp. of? correct
answers125°F
In calibrating magnetizing equipment ammeter, what is the max deviation allowed relative to the actual
current value as shown by the test meter? correct answers+/- 10%of full scale
The max deposition rate for pulsed arc transfer mode is? correct answersAbout 200 in./min.
Consequence factors to consider in an RBI assessment of a tank include? correct answersMode of failure
The pattern of caustic cracking observed on the steel surface appears sometimes as cracks that? correct
answersHave spider-web appearance initiating at weld flaws.
When a in-service tank inspection is performed, what is the recommended method of documenting
leaks on a riveted shell? correct answersLocate leaks by sketch or photo.
An example of a non-essential variable for a tank bottom scanner qualification test is? correct
answersPlate cleanliness.
The annual cathodic protection surveys for a impressed current system may? correct answersInclude one
or more electrical measurements performed previously in the initial survey.
For tank repairs, safeguards for personal health and safety, and prevention of property damage shall be
developed to the guidelines given in which standard. correct answersAPI 2015 and API 2217A
How far beyond the outer periphery of the foundation ring wall should the drip ring extend? correct
answers3 inches
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