API 570 Model Questions-1

8/10/2019 API 570 Model Questions-1

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API 570 Model question-1

The following is a collection of questions remembered by various students who took API 570 examin the ast!

The answers will be found in the following reference ublications

API 570, RP 574, RP 578, ASME Sec.V, Sec.IX, B 1. ! B 1".5#$%

"! #hat is the height of the raised face on regularly furnished class $00 %aised &ace &langes'A! 0!0()! 0!0*+! 0!"*,! 0!-5

.ection/age %eference Publication

-! In a iing system1 2P. 31 .4. material A65$ rade )1 the thickness near a wel is 0!"89! The system is designed tooerate at (75 P.I at 500:&! #hat is the actual remaining corrosion allowance'

A! 0!07(

)! 0!080+! 0!0*",! 0!"


$! #hich of the following are nonessential variables for .4A#'A! +hange of electrode)! +hange in the groove design+! +hange in the P#;T,! +hange in the welding rocess


3! #hen designating an inne advantage of isotoe radiograhy is it A! #ill detect all defects in a ie weld

)! +an be erformed by anyone with little or no training+! +an not suly a ermanent visual record,! Is not an ignition source in the resence of hydrocarbons


7! A iing circuit1 $00?long1 oerates at 500:&! #hat is the linear thermal exansion of the circuit if the circuit wasconstructed using A "0(6) iing'

A! $!(- inches

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)! 7!-3 inches+! "0!8( inches,! "3!38 inches


8! An emloyer may accet a erformance qualification made for another emloyer rovided the A! Insector secifically aroves

)! Piing engineer aroves+! Action is allowed by A.4@1 .ection ,! >ther emloyer is a subcontractor for the current emloyer


*! uided bend secimens for welder qualifications shall have no oen defects in the weld or heat affected =oneexceeding

A! "/"(9 )! "/89 +! $/"(9 ,! no oen defects allowed


"0! The insector is reviewing a radiograh of a ie weld1 the ie wall is B9 thick! #hat is the hole tye ICI designationif the enetrameter is laced on the source side'A! "-)! "5+! "7

,! -0


""! In a iing system1 the most suscetible location for cracking is A! Around suorts

)! In welds+! In bolting,! In the areas of temorary clams


"-! #hat is the DP92o! for .A 3"3 rade A'A! ")! -+! $,! "")


"$! #hat is the minimum thickness of a class "500 2P. 3 blind flange'A! "!"-9 )! "!889 +! -!"-9 ,! -!889


"3! The reheat =one shall extend at least beyond each edge of the weldA! (T)! "- inches E$0cmF+! wall thickness divided by $,! -5 mm E" inchF


"5! ,uring rocedure qualification1 how many nick6break secimens are required if the ie is 2P. 8 ./801 0!500 wall'A! "

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)! -+! 3,! 2one


"(! The owner/user shall maintain aroriate ermanent and rogressive records of each iing system! The recordsshall include

A! All original construction data)! .ystem serviceG classificationG identification numbers+! All A.4@ requirements,! >riginal heat and batch numbers of the system


"7! The maximum carbon content of a mild steel weld deosit is A! 0!"5H carbon)! 0!-0H carbon+! 0!$0H carbon,! 0!"7H carbon


"8! #hat is the recommended reheat temerature for " 9 thick carbon steel'A! $00:&)! -$5:&+! "75:&,! 2one


"*! An alternative to insection of buried iing is to leak test the system with liquid at a ressure at least

A! " B times the 4aximum oerating ressure

)! " times the 4aximum oerating ressure+! "0H greater than the 4aximum oerating ressure,! Actual


-0! The & number of .&A65!" J 5!5 isKA! ")! -+! $,! All of the above


-"! As a art of general maintenance1 any reair organi=ation may make reairs to a iing system as long asKA! The insector is satisfied with the cometency of the reair organi=ation)! The iing engineer is on site+! The reair organi=ation has a contract,! Their hourly rate is accetable


--! #elded


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A! Lero Eno evident imerfectionsF)! M "/$- inch+! M " mm,! )oth ) and +


-3! +hanging the weld rogression from uhill to down hill will have a ma

API 570 Model Questions-1

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