API 653 Exam with Questions and Correct Verified Answers
A weld-on patch plate used for repairing a tank bottom shall? - Answer-Never 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? - Answer-Visual and RT
When a tank bottom is removed by using arc-gauging, the areas of the tanks shell-to- bottom weld shall
be? - Answer-Magnetic-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. - Answer-A min. of once a year.
Fitness for service evaluations may be used to exempt a repair from hydrostatic testing if performed by
a? - Answer-Engineer experienced in tank design and evaluation methodologies used.
Flame arrestors should be inspected when? - Answer-At 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? - Answer-Twice 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? - Answer-10 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? - Answer-12 inches
, Surface prep, anchor patterns typically required for coatings are generally how many mils. deep? -
Answer-1.5-4 Mils.
A limitation of PT is that standard penetrant systems are limited to welds having a max temp. of? -
Answer-125°F
In calibrating magnetizing equipment ammeter, what is the max deviation allowed relative to the actual
current value as shown by the test meter? - Answer-+/- 10%of full scale
The max deposition rate for pulsed arc transfer mode is? - Answer-About 200 in./min.
Consequence factors to consider in an RBI assessment of a tank include? - Answer-Mode of failure
The pattern of caustic cracking observed on the steel surface appears sometimes as cracks that? -
Answer-Have 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? - Answer-Locate leaks by sketch or photo.
An example of a non-essential variable for a tank bottom scanner qualification test is? - Answer-Plate
cleanliness.
The annual cathodic protection surveys for a impressed current system may? - Answer-Include 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. - Answer-API 2015 and API 2217A
A weld-on patch plate used for repairing a tank bottom shall? - Answer-Never 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? - Answer-Visual and RT
When a tank bottom is removed by using arc-gauging, the areas of the tanks shell-to- bottom weld shall
be? - Answer-Magnetic-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. - Answer-A min. of once a year.
Fitness for service evaluations may be used to exempt a repair from hydrostatic testing if performed by
a? - Answer-Engineer experienced in tank design and evaluation methodologies used.
Flame arrestors should be inspected when? - Answer-At 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? - Answer-Twice 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? - Answer-10 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? - Answer-12 inches
, Surface prep, anchor patterns typically required for coatings are generally how many mils. deep? -
Answer-1.5-4 Mils.
A limitation of PT is that standard penetrant systems are limited to welds having a max temp. of? -
Answer-125°F
In calibrating magnetizing equipment ammeter, what is the max deviation allowed relative to the actual
current value as shown by the test meter? - Answer-+/- 10%of full scale
The max deposition rate for pulsed arc transfer mode is? - Answer-About 200 in./min.
Consequence factors to consider in an RBI assessment of a tank include? - Answer-Mode of failure
The pattern of caustic cracking observed on the steel surface appears sometimes as cracks that? -
Answer-Have 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? - Answer-Locate leaks by sketch or photo.
An example of a non-essential variable for a tank bottom scanner qualification test is? - Answer-Plate
cleanliness.
The annual cathodic protection surveys for a impressed current system may? - Answer-Include 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. - Answer-API 2015 and API 2217A
