API 653 Questions Monkey Puzzle

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    A.Corrosion on the bottom side of floor plates in aboveground storage tanks is affected

    most by:

    1. Composition of the contents stored in the tank.

    2. Welding procedures used during construction of the tank.

    3. The metal used for construction of the floor.

    4. Soil characteristics directly underneath the tank.

    B. Except for cast iron parts, internal coils and supports may be:

    1. Dye penetrant tested.

    2. Leak tested.

    3. ammer tested.

    4. !agnetic particle tested.

    C.At the next out-of-service inspection on a tank that has had a hot tap performed, the

    visual inspection should include:

    1. Si"e of the hot tap no""le holes.

    2. Thickness of the plate at the hot tap.

    3. eight of the hot tap from the tank #ottom.

    4. Trimming of the hot tap no""le.

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    . !f arc strikes, gouges, or tears from temporary attachments are identified, they:

    1. !ust #e e$aluated on a case%#y%case #asis.

    2. !ust #e repaired #y &elding &ith an appropriate repair procedure.

    3.!ust #e repaired #y remo$ing the plate area containing the scars and &elding in a #utt&elded patch.

    4. 're accepta#le( pro$ided they are more than 2 feet from any &eld seam.

    E.

    !n an examination of a tank"s bottom #eld seam by vacuum box testing, the vacuum test

    for each test is:

    1. ' near pefect $acuum.

    2. ) to 1 pound per s*uare inch negati$e +$acuum,.

    3. 't least 2 pounds per s*uare inch gauge( negati$e +$acuum,.

    4. 14.-- pounds per s*uare inch a#solute( at mean sea le$el.

    $. %artial or complete &acking of a tank shell is considered:

    1. /outine maintenance.

    2. ' minor alteration.

    3. ' minor repair.

    4. ' ma0or repair.

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    '.(hen a tank is being dismantled for relocation, the roof, shell, and bottom plates may

    be cut:

    1. To one%half the si"e of the original plates.

    2. 'long the eisting &eld seams for transportation to the ne& site.

    3.To a si"e no smaller than one%half the maimum &eight allo&ed #y the transporting$ehicle including the crane.

    4. To pieces of any si"e that are readily transporta#le to the ne& site.

    ).

    uring a tank reconstruction, under #hat circumstances may a ne# shell-to-bottom

    #eld be exempt fromhydrostatic testing*

    1.When the root pass has #een $isually inspected and the final &eld is fully eamined(

    $isually and radiographically.

    2. ' shell%to%#ottom &eld is ne$er eempted from hydrostatic testing.

    3.When the root pass has #een $isually inspected and the final &eld is fully eamined(

    $isually and #y $acuum #o.

    4.When the &elding method has #een re$ie&ed and appro$ed #y an engineer eperienced

    in tank design in accordance &ith ' Standard -5.

    !. !n atmospheric conditions, bottom coatings may be applied if the steel temperature is:

    1. 26 7 a#o$e the de& point.

    2. 6 7 #elo& the de& point.

    3. 156 7 a#o$e the de& point.

    4. 't the de& point.

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    +.!n evaluating the level of cathodic protection by measuring potentials at the tank

    perimeter, correction of measurements may be reuired to ad&ust for:

    1. 8oltage +/, drop in the soil.

    2. The type of system 9 sacrificial or impressed current.

    3. re$ailing &eather at the time of measurement.

    4. The age of the tank #ottom.

    .

    According to A%! tandard /01, section 2, #hich of the follo#ing bears ultimate

    responsibility for compliance #ith the provisions of the tandard.

    1. nspector.

    2. 8endor : fa#ricator.

    3. ;&ner : operator.

    4. ' Committee.

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    By Jannie de BeerPage 5 of 5