Additional API 571 Practice Questions Flashcards _ Quizlet

4/2/2016

Addi ti onal API 571 Pr actice Questi ons fl ashcar ds | Qui zl et

Additional API 571 Practice Questions 12 terms by Jmehatt by Jmehatt

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What type mechanical testing can confirm temper embrittlement and what is the main type of failure mode?

a 4.2.3.5

a) It may be confirmed by impact testing and may result in catastrophic brittle fracture b) It can only be confirmed through metallographic examination and may result in brittle fracture c) It may be confirm c onfirmed ed by tensile testing and may result long term creep failure d) It can be confirmed by 100% radiography and may result in long term creep failure

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Additional API 571 Practice Questions flashcards | Quizlet

Most cases of sigma phase embrittlement are found in the form of   ______ during startup or shutdown when the material is below about 500oF (260°C): a) cracking in both wrought and cast (welded) metals b) coalesced chromium carbides that may or may not be found with NDE techniques c) chromium carbide precipitation that can be found with metallographic examination d) all forms of carbide precipitation that can be found with metallographic examination

a 4.2.6.5 b)

Carbon steels, low alloy steels, and 400 series stainless steels are of prime concern for: a) 885°F embrittlement b) Sigma phase embrittlement c) a and b d) Brittle fracture

d 4.2.7.2

To prevent stress ruptures: a) minimize localized temperature excursions. b) utilize burners which produce a more diffuse flame pattern. c) maintain refractory in serviceable condition in refractory lined equipment. d) all of the above.

d 4.2.10.6 a) c) e)

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Additional API 571 Practice Questions flashcards | Quizlet

Dissimilar metal weld cracking typically: a) forms at the toe of the weld in the heat-affected zone of the ferritic material b) occurs in welds joining tubes c) occurs in support lugs or attachments of cast or wrought 300 Series SS to 400 Series ss d) all of the above

d 4.2.12.5 a) b)

In fired heater tubes, inspection of  dissimilar metal weld cracking can be performed by: a) visual, MT and PT inspect ion b) MT and PT inspection c) visual inspect ion only d) None of the a bove

a 4.2.12.7 a)

Erosion-corrosion occurs when corrosion contributes to erosion by: a) removing protective films or scales b) removing protective films or scales and exposmg the metal surface to aqueous corrosion under the combined action of er osion and corrosion c) exposing the metal surface to aqueous corrosion under the combined action of erosion and corrosion d) accelerating th e anode-cath ode potential

a 4.2.14.1 b)

Inspection techniques that can be used to detect fatigue cracks at known areas of stress concentration a re: a) PT, MT and SWUT b) PT and MT c) VT and WFMT d) UT and RT

a 4.2.16.7 a)

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In many cases, reheat cracks are confined to: a) weld h eat affected zone and some type of stress concentration location b) fine intergr anular precipitation sites c) fine intergranular precipitation sites in aqueous corrosion environments d) all of the above

a 4.2.19.3 c)

 Joint configurations in heavy wall sections that are not designed to minimize restraint during welding and PWHT are prone to: a) fatigue cracking during fabrication , including PWHT b) thermal fatigue cracking during service c) reheat cracking during PWHT or in service at elevated temperatures d) HIC during PWHT

c 4.2.19.3 d) 4.2.19.6 a)

Corrosion of piping, pressure vessels and structural components resulting from water trapped under insulation or fireproofing are most likely to occur in: a) carbon steel and coated low alloy steels b) 300 Series SS and duplex stainless steels c) nickel and titanium alloys d) tantalum alloys

b 4.3.3.2

The most important variables that affect and differentiate the various forms of wet H2S damage are: a) environmental conditions (PH, H2S level, contaminants, temperature) b) material properties (hardness, microstructure, strength c) tensile stress level (applied or residual) d) all of the above

d 5.1.2.3.3 a)

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