API 653 Exam Questions And Complete Solutions

API 653 Exam Questions And Complete Solutions what is the minimum thickness for a tank floor plate with no means for leak detection or secondary containment if an RBI program is not in place - Answer -0.1 inch reference table 4.4 API 653 when a full hydrostatic test is required, it shall be held for - Answer -24-hours reference 12.3.1 API 653 how many radiographs shall be taken in a square 2 in x 24 in but welded insert play in a 1-inch thick shell - Answer -6 total one horizontal one vertical one in each corner : reference 12.2.1.6.2 API 653 what is the minimum number of radiographs that shall be taken on a circular but welded insert plate in a shell 1/2 in thick - Answer -one : reference 12.2.16 .1 API 653 how much time do you need to keep the radiographs of a reconstructed tank - Answer - 1 year reference 13.2.3 API 653 who should conduct visual inspection and review and NDE results? - Answer -the authorized inspector how much time should the operator keep the cathodic protection records - Answer -5 years minimum diagnostic length of a radiograph is - Answer -6 inches the total metal lost / the period of time over which the metal loss occurred is the - Answer -corrosion rate the presence of rock under the steel bottom of an AST would have what effect - Answer -promote severe Underside corrosion when do you use thin-film linings - Answer -when the tank is new or has light corrosion a formal visual external inspection by an authorized inspector shall be made - Answer - at least every five years or RCA / 4N years whichever is less radiographic density shall be check by densitometer calibrated on a step wedge film traceable to - Answer -a National Standard a welder deposits more metal than Allowed by the WPS what should be done - Answer - re-qualify the welder what is the maximum critical length for plate thickness determination - Answer -40 inches when is it necessary for a hydrostatic test on a reconstructed tank - Answer -always between thin film and thick film Linings which lining is best for crude oil tank that operates at 190 degrees F - Answer -thin film what is the maximum spacing for MT prods - Answer -8 inches