additional api 571 practice questions flashcards _ quizlet

4/2/2016 Additional API 571 Practice Questions flashcards | Quizlet

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Additional API 571 Practice Questions

12 terms by Jmehatt

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What type mechanical testing can

confirm temper embrittlement and

what is the main

type of failure mode?

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 confirmed 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

a

4.2.3.5

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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)



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)



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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