API 653 Exam 148 Questions with Verified Answers,100% CORRECT

API 653 Exam 148 Questions with Verified Answers 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 - CORRECT ANSWER 0.1 inch reference table 4.4 API 653 when a full hydrostatic test is required, it shall be held for - CORRECT 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 - CORRECT 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 - CORRECT ANSWER one : reference 12.2.16 .1 API 653 how much time do you need to keep the radiographs of a reconstructed tank - CORRECT ANSWER 1 year reference 13.2.3 API 653 who should conduct visual inspection and review and NDE results? - CORRECT ANSWER the authorized inspector how much time should the operator keep the cathodic protection records - CORRECT ANSWER 5 years minimum diagnostic length of a radiograph is - CORRECT ANSWER 6 inches the total metal lost / the period of time over which the metal loss occurred is the - CORRECT ANSWER corrosion rate the presence of rock under the steel bottom of an AST would have what effect - CORRECT ANSWER promote severe Underside corrosion when do you use thin-film linings - CORRECT ANSWER when the tank is new or has light corrosion a formal visual external inspection by an authorized inspector shall be made - CORRECT 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 - CORRECT ANSWER a National Standard a welder deposits more metal than Allowed by the WPS what should be done - CORRECT ANSWER re-qualify the welder what is the maximum critical length for plate thickness determination - CORRECT ANSWER 40 inches when is it necessary for a hydrostatic test on a reconstructed tank - CORRECT ANSWER always between thin film and thick film Linings which lining is best for crude oil tank that operates at 190 degrees F - CORRECT ANSWER thin film what is the maximum spacing for MT prods - CORRECT ANSWER 8 inches what is the height of the lead symbol B that shall be attached to the back of each film holder during each exposure to determine if Backscatter radiation is exposing the film - CORRECT ANSWER 1/2 inch any work on a tank that changes its physical dimensions or configuration is called an - CORRECT ANSWER alteration which Annex of API 653 provides guides about above ground storage tanks inspector certification - CORRECT ANSWER Annex D the maximum permissible limit of exposure to organic lead in a normal 8 hour work day is - CORRECT ANSWER 2 micrograms of organic lead per cubic feet the full course width for shell plate as per API 650 shall be a minimum of - CORRECT ANSWER 72 in in accordance with API standard 653, critical zone for repairs to a tank bottom is that portion, which is - CORRECT ANSWER measured radially inward within 3 inches of the Inside Edge of the shell as per API standard 653 a routine in-service visual external inspection of an above ground storage tank shall be done every - CORRECT ANSWER one month how many types of authorized inspection agencies can exist - CORRECT ANSWER four types who has ultimate responsibility for complying with the provisions of the API 653 standard - CORRECT ANSWER the owner-operator jacking of a tank is an alteration or repair - CORRECT ANSWER repair in which case is external inspection permitted in lieu of internal inspection - CORRECT ANSWER when you have access to the underside of the bottom does a relocated tank need hydrostatic testing - CORRECT ANSWER yes which nde technique is used to fully check shell welds - CORRECT ANSWER hydrostatic testing reinforcement pad welds should be pneumatically tested at which pressure - CORRECT ANSWER 15 PSIG during a hydrostatic test at least how many measurement points shall be surveyed - CORRECT ANSWER 8 points during a hydrostatic test for a new tank at least how many measurements sets shall be taken - CORRECT ANSWER at least six sets which type of Tanks use wind girders - CORRECT ANSWER open-top tanks the total resistance of tank to Earth should not exceed approximately - CORRECT ANSWER 25 ohms vacuum box testing requires how many PSIG of vacuum minimum - CORRECT ANSWER 3 PSIG API 653 standard covers maintenance repair relocation and reconstruction of Tanks constructed according to what standards - CORRECT ANSWER API 650 and API 12C guided bend test are used to - CORRECT ANSWER determine the degree of soundness and ductility of Groove weld joints tension tests are used to - CORRECT ANSWER determined the ultimate strength of Groove weld joints how many tension tests are required for procedure qualification - CORRECT ANSWER two tension tests which nde technique are volumetric - CORRECT ANSWER radiography and ultrasound radiography can be used to qualify welders performance - CORRECT ANSWER true apart from 6G which pipe position can be used to qualify a welder for all other positions - CORRECT ANSWER 2G and 5G the 1 foot method designed shall not be used in tanks over which diameter - CORRECT ANSWER 200 ft maximum design internal pressure in an AST is not exceeding - CORRECT ANSWER 2.5 PSIG at which temperature is risk of brittle fracture is considered minimal - CORRECT ANSWER 50° f tank shell thickness below 1/2 inch is there risk of brittle fracture - CORRECT ANSWER no it is minimal an image quality indicator penetrameter is used to - CORRECT ANSWER determine the image quality of a radiograph API 650 limits design temperature to be no more than - CORRECT ANSWER 93° C or 200° Fahrenheit plate for reconstructed tank has been out in the open for more than 180 days can it be used for tank shells - CORRECT ANSWER yes but only with a UTM assessment if impact testing was not done on an original tank material of unknown toughness the hot Taps shall be limited to what diameter - CORRECT ANSWER NPS 4 in tank ulceration, before hydrostatic test is required if nozzles larger than which diameter ________ below are below liquid level - CORRECT ANSWER NPS 12 is it permitted to use cast iron for pressure parts of a tank - CORRECT ANSWER no A new A35 tank is to be hydrostatically tested. what maximum allowable stress should be used to determine the maximum hydrostatic height - CORRECT ANSWER 24,900 routine Visual and service inspections of above ground storage tanks from the ground may be done by - CORRECT ANSWER owner-operator image quality indicators are usually placed in which side of the radiographic arrangement - CORRECT ANSWER source side if a welder test for a 6G position he qualifies for - CORRECT ANSWER all positions for repair of shell plate thicker than one in the base metal within three inches of the repair shall be preheated to what temperature - CORRECT ANSWER 140° f the maximum spacing of measurement points around the circumference of a tank during a hydrostatic test is - CORRECT ANSWER 32 ft the maximum acceptable undercutting a vertical butt welds in a reconstructed tank shall be limited to - CORRECT ANSWER 1/64 inch how many tensile tests are required to qualify a 1/4 inch plate Groove weld - CORRECT ANSWER two for what diameter tank is the variable design method for calculating shell thickness mandatory - CORRECT ANSWER 200 ft at the maximum pole spacing a magnetic yoke is expected to lift at least - CORRECT ANSWER 10 lb magnetizing power of magnetic yokes shall be checked every - CORRECT ANSWER every time prior to use when there is no RBI assessment the internal inspection interval of an above ground storage tank shall not exceed - CORRECT ANSWER 20 years the minimum number of settlement points around a tank periphery is - CORRECT ANSWER 8 if corrosion rates are not known external UT measurements of a new tank shell shall be made not later than how many years - CORRECT ANSWER 5 welders participating and tank construction should be tested According to which standard - CORRECT ANSWER asme IX a welder is qualified to B31.3. Is he authorized to weld in the tank - CORRECT ANSWER no what is the minimum amount of manholes for a single deck external floating roof that is 15m in diameter - CORRECT ANSWER two a riveted tank shell with a butt joint has 3 rows at each side of the Joint Center Line. What is the joint efficiency? - CORRECT ANSWER 0.85 what is the value used for joint efficiency in API 650 shell design calculations - CORRECT ANSWER 1 since which edition of API 650 has a joint efficiency of 1.0 been allowed - CORRECT ANSWER 7th edition is PT required for areas where temporary attachments have been removed if the show is A36 Steel - CORRECT ANSWER no essential variables for SMAW procedure qualification are summarized in which paragraph of ASME IX - CORRECT ANSWER QW- 253 openings in tank shells larger than required to accommodate a ________ inch standard weight coupling shall be reinforced - CORRECT ANSWER NPS 2 it is allowed to have course plates thinner than those in the course above it - CORRECT ANSWER no the minimum allowable thickness of an annular plate ring is - CORRECT ANSWER 0.1" misalignment in completed vertical joints for Shell plates greater than 16 mm should not exceed - CORRECT ANSWER 3 mm is API 653 used to inspect refrigerated tanks - CORRECT ANSWER no to be a major alteration, a nozzle installed below liquid level must be what size - CORRECT ANSWER larger than NPS 12 UT examination methods shall be in accordance with - CORRECT ANSWER asme boiler and pressure vessel code section V vertical welds on new tanks must be fully radiograph if the shell thickness exceeds which thickness - CORRECT ANSWER 1 inch is welder identification required for roof welds - CORRECT ANSWER no welder or welding operators identification marks shall be located adjacent to completed weld at intervals not exceeding - CORRECT ANSWER 3 feet which standard is mandatory for new material to be used in an existing tank - CORRECT ANSWER the current applicable standard which is the maximum allowable slope of a frangible roof of a tank 15m or greater - CORRECT ANSWER 2:12 which type of roof is used to reduce Vapor space and product loss - CORRECT ANSWER floating roof tank the area on a tank bottom where settlement begins is called the - CORRECT ANSWER break over point a tank for which corrosion rates and service history are not known and documented is known as - CORRECT ANSWER a candidate tank a procedure for installing the nozzle in the Shell of a tank that is in service is called - CORRECT ANSWER hot tap installing a shell penetration NPS 6 in size, 24" high from the bottom, is it considered a shell penetration - CORRECT ANSWER no a tank for which corrosion rates and services are known and documented is known as - CORRECT ANSWER a control tank any work necessary to maintain or restore a tank to a condition suitable for safe operation is called a - CORRECT ANSWER repair should you consider jacking up a tank show a major alterations/repair? - CORRECT ANSWER yes an authorized___________ is representative of an organization's Integrity Department - CORRECT ANSWER inspector when the results of a tank inspection show that a change has occurred from the original physical condition of that tank, should it be repaired? - CORRECT ANSWER no, and examination shall be made for suitability of service Ruth plates to be repaired or those with an average thickness of less than _______ in any 100 square inches - CORRECT ANSWER 0.09 in before changing the service of a tank to operation at temperatures above 200° F the requirements of which appendix shall be considered? - CORRECT ANSWER appendix M of API 650 the evaluation of the existing tank shell shall be conducted by a - CORRECT ANSWER storage tank engineer when a tank shell has a corroded area with a thickness lower than allowed, there are 3 options, which are - CORRECT ANSWER -damaged areas shall be repaired the -allowable liquid level of the tank reduced -tank retired how many types of shell Distortion does API 653 consider - CORRECT ANSWER 5 types, -out of roundness -buckled areas -flat spots -peeking and banding at a weld joints cracks in the shelter bottom weld are allowed under which condition? - CORRECT ANSWER none. They are never allowed if a repair is needed, what is the first step you have to take? - CORRECT ANSWER a repair procedure shall be developed and implemented the condition of wind girders is part of the shell analysis - CORRECT ANSWER yes is grinding to eliminate weld defects permissible - CORRECT ANSWER yes, if the resulting profile satisfies base thickness in weld size requirements in the evaluation of tank shells which operate at elevated temperatures, the value of allowable stress for each shell course should be a minimum of _______ times the material yield strength - CORRECT ANSWER 0.8 when evaluating a shell of a tank at elevated temperatures, what value of yield strength should be assumed if the material is not known? - CORRECT ANSWER 30,000 lb per square inch which RP covers of selection basis for cathodic protection? - CORRECT ANSWER API 651 plate thickness in the critical zone of the bottom of a tank in no case shall be less than - CORRECT ANSWER 0.1 inch the projection of the bottom plate beyond the outside toe of the shelter bottom weld shall be at least - CORRECT ANSWER 3/8 inch unless special reasons indicate different, the interval between inspections of a tank (both internal and external) should be determined by - CORRECT ANSWER it's service history if inspecting an insulated tank during the five-year external inspection, do you need to remove all the of the insulation? - CORRECT ANSWER no, you only need to remove insulation to the extent necessary for a thorough inspection during a five-year external inspection, to what extent shall be tank grounding systems inspected? - CORRECT ANSWER visual inspection is required corrosion rates are known, external UT measurements of a new tank shell shall be made - CORRECT ANSWER at the lesser of RCA/2N years or 15 years when a new tank has no release prevention systems, the interval from initial service until the initial internal inspection shall not exceed ___ years - CORRECT ANSWER 10 when a tank has a release prevention system consisting of an original nominal bottom thickness 5/16 inch or greater, what is the initial internal inspection interval - CORRECT ANSWER 12 years when a tank has an RPS consisting of cathodic protection of the soil side of the primary tank bottom, which is the initial internal inspection interval - CORRECT ANSWER 12 years when a tank has an RPS consisting of a thin film lining of the product side of the tank bottom, which is the initial internal inspection interval - CORRECT ANSWER 12 years when a tank has an RPS consisting of fiberglass reinforced lining of the product side of the tank bottom, which is the initial internal inspection interval - CORRECT ANSWER 13 years when a tank has an RPS consisting of cathodic protection plus a thin film lining, which is the initial internal inspection interval - CORRECT ANSWER 14 years when a tank has an RPS consisting of cathodic Protection Plus fiberglass reinforced lining, which is the initial internal inspection interval - CORRECT ANSWER 15 years when a tank has an RPS consisting of a release prevention barrier and a similar service assessment, which is the initial internal inspection interval - CORRECT ANSWER 20 years when a tank has an RPS consisting of release prevention barrier when a risk-based inspection was performed, which is the initial internal inspection interval - CORRECT ANSWER 25 years hobby assessment shall consist of a systematic evaluation of both the ________ and the associated consequence of failure - CORRECT ANSWER likelihood of failure how many types of Records should an operator keep at all times? - CORRECT ANSWER 3, construction records, inspection history and repair / alterations history all you shall joints shall be _________ joints with complete penetration and fusion - CORRECT ANSWER butt welded each existing shell joint should comply with - CORRECT ANSWER the as-built standard who can authorize repair? - CORRECT ANSWER inspector or engineer experience in storage tank design the minimum dimension for a replacement shell plate is - CORRECT ANSWER 12 inches when welding shell seams, which seam should weld first: horizontal or vertical? - CORRECT ANSWER vertical lapped patch shell repairs shall not be used on any shell course thickness that exceeds - CORRECT ANSWER 1/2 in lapped patch show repair plates shall not be less than - CORRECT ANSWER 3/16 inch the shape of the repair plate may be circular, oblong, square, or rectangular. All Corners, except at the Shell to bottom joint, shall be rounded to a minimum radius of - CORRECT ANSWER 2 inches lapped patch repair plates positioned on the shell interior shall be located such that the toe-to-toe weld clearances are a minimum of __________ to the shell to bottom weld - CORRECT ANSWER 6 inches the minimum lapped patch repair plate Dimension is - CORRECT ANSWER 4 inches what is the maximum vertical dimension of a lapped patch repair plate? - CORRECT ANSWER 48 inches what is the maximum horizontal dimension of a lapped repair plate? - CORRECT ANSWER 72 inches can you put a patch plate over 1/2 inch diameter hole, then weld the inner perimeter of the hole? - CORRECT ANSWER no. The whole must be at least 2 inch diameter the repair plate thickness required calculation shall have a joint efficiency not exceeding - CORRECT ANSWER 0.7 can you put a 3/8 inch patch plate over a 1/4 inch shell? - CORRECT ANSWER no the repair plate thickness required calculation shall use a joint efficiency not exceeding - CORRECT ANSWER 0.35 lapped patch shell shall not exceed - CORRECT ANSWER 1/2 inch the repair plate thickness shall not exceed - CORRECT ANSWER one third of the shell plate or 1/8 inch if there was a small leak and product stored is corrosive, can you use the lapped patch method? - CORRECT ANSWER no pick the correct manual welding rod that must be used to make hot taps or for reconstruction of above ground storage tanks - CORRECT ANSWER E7018 - CORRECT ANSWER