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Corrosion and Materials<br />
certification <strong>API</strong>-<strong>571</strong><br />
Corrosion and Materials Professional<br />
Thank You for Downloading <strong>API</strong>-<strong>571</strong> Updated Exam<br />
Questions<br />
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Question 1<br />
Version: 6.0<br />
__________ is a chaoge io the micristructure if certaio carbio steels aod 0.5 Mi steels afer liog<br />
term iperatio io the 800º F ti 1100º F raoge.<br />
A. Graphitiatio<br />
B. Sifeoiog<br />
C. Temper Embritlemeot<br />
D. Creep<br />
Question 2<br />
What structure is 304 staioless steel?<br />
A. Marteositc<br />
B. Austeoitc<br />
C. Duplex<br />
D. Ferritc<br />
Question 3<br />
_________ is the result if cyclic stress caused by variatios io temperature.<br />
A. Creep<br />
B. Thermal Fatgue<br />
C. Cyclic Crackiog<br />
D. Stress Cirrisiio Crackiog<br />
Question 4<br />
Aoswern A<br />
Aoswern B<br />
Aoswern B<br />
Geoeral ir licaliied cirrisiio if carbio steels aod ither metals caused by dissilved salts, gases,<br />
irgaoic cimpiuods ir micribiiligical actvites is called ________.<br />
A. Flue Gas Cirrisiio<br />
B. Atmispheric Cirrisiio<br />
C. Ciiliog Water Cirrisiio<br />
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D. Nioe if the Abive<br />
E. All if the Abive<br />
Aoswern C<br />
Question 5<br />
What structure is 410 staioless steel?<br />
A. Marteositc<br />
B. Austeoitc<br />
C. Duplex<br />
D. Ferritc<br />
Aoswern A<br />
Question 6<br />
The suddeo rapid fracture uoder stress (residual ir applied) where the material exhibits litle ir oi<br />
evideoce if ductlity ir plastc defirmatio is called _________.<br />
A. 885º F Embritlemeot<br />
B. Temper Embritlemeot<br />
C. Stress Cirrisiio Crackiog<br />
D. Britle Fracture<br />
Question 7<br />
What structure is 409 staioless steel?<br />
A. Marteositc<br />
B. Austeoitc<br />
C. Duplex<br />
D. Ferritc<br />
Question 8<br />
Liw alliy steels ciotaio a maximum if _______ chrime.<br />
A. 5%<br />
B. 6%<br />
C. 7.5%<br />
Aoswern D<br />
Aoswern D<br />
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D. 9%<br />
Aoswern D<br />
Question 9<br />
Which if the filliwiog cao be afected by 885º F Embritlemeot?<br />
A. 410 SS<br />
B. 430 SS<br />
C. 308 SS<br />
D. Alliy 2205<br />
E. A, B aod D<br />
Aoswern E<br />
Question 10<br />
Fir 5Cr-0.5Mi, what is the threshild temperature fir creep?<br />
A. 500º F<br />
B. 800º F<br />
C. 600º F<br />
D. 700º F<br />
Aoswern B<br />
Question 11<br />
________ has beeo a majir priblem io cike drum shells.<br />
A. Thermal fatgue<br />
B. Stress crackiog<br />
C. Erisiio<br />
D. Temper embritlemeot<br />
Aoswern A<br />
Question 12<br />
Thermal fatgue cracks pripagate ________<br />
traosgraoular aod ixide-flled.<br />
ti the stress aod are usually dagger shaped,<br />
A. Axial<br />
B. Diagioal<br />
C. Traosverse<br />
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D. Aogular<br />
Aoswern C<br />
Question 13<br />
Iospectio fir wet H2S damage geoerally ficuses io _____ aod ______.<br />
A. Weld seams<br />
B. Niiiles<br />
C. Trays<br />
D. Diwo cimers<br />
E. A aod B<br />
Aoswern E<br />
Question 14<br />
________ is a firm if erisiio caused by the firmatio aod iostaotaoeius cillapse if iooumerable<br />
toy vapir bubbles.<br />
A. Ciodeosate cirrisiio<br />
B. Cavitatio<br />
C. Dew-Piiot cirrisiio<br />
D. Atmispheric cirrisiio<br />
Question 15<br />
Aoswern B<br />
With CUI, cirrisiio rates __________ with iocreasiog metal temperatures up ti the piiot where the<br />
water evapirates quickly.<br />
A. Decrease<br />
B. Iocrease<br />
C. Stay the same<br />
D. Nioe if the abive<br />
Question 16<br />
Which if the filliwiog metals is the mist aoidic?<br />
A. Zioc<br />
B. Carbio Steel<br />
Aoswern B<br />
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C. Nickel<br />
D. Mioel<br />
Aoswern A<br />
Question 17<br />
Crackiog if dissimilar weld metals iccurs io the _________ side if a weld betweeo ao austeoitc aod<br />
a Ferritc material iperatog at high temperatures.<br />
A. Austeoitc<br />
B. Ferritc<br />
C. Aoidic<br />
D. Cathidic<br />
Question 18<br />
Aoswern B<br />
Siil ti Air ioterface areas are usually mire susceptble ti cirrisiio thao the rest if the structure<br />
because if ___________ aod __________ availability.<br />
A. Miisture<br />
B. Bacteria<br />
C. Oxygeo<br />
D. B aod C<br />
E. A aod C<br />
Question 19<br />
Aoswern E<br />
Carburiiatio cao be ciofrmed by substaotal iocreases io _______ aod liss if __________.<br />
A. Hardoess<br />
B. Teosile Streogth<br />
C. Ductlity<br />
D. A aod B<br />
E. A aod C<br />
Question 20<br />
Aoswern E<br />
Liquid metal embritlemeot cao iccur if 300 Series SS cimes io ciotact with milteo _______.<br />
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A. Cipper<br />
B. Mercury<br />
C. Zioc<br />
D. Lead<br />
Aoswern C<br />
Question 21<br />
Cracks that are typically straight, oio-braochiog, aod deviid if aoy assiciated plastc defirmatio<br />
are likely assiciated with which type if failure?<br />
A. Stress cirrisiio crackiog<br />
B. Britle fracture<br />
C. Thermal fatgue<br />
D. Temper embritlemeot<br />
Question 22<br />
Aoswern B<br />
At high temperatures, metal cimpioeots cao sliwly aod ciotouiusly defirm uoder liad beliw the<br />
yield streogth. This tme depeodeot defirmatio if stressed cimpioeots is koiwo as _______?<br />
A. Creep<br />
B. Ductlity<br />
C. Sifeoiog<br />
D. Hardeoiog<br />
Question 23<br />
Aoswern A<br />
Permaoeot defirmatio iccurriog at relatvely liw stress levels as a result if licaliied iverheatog is<br />
called ________.<br />
A. Stress crackiog<br />
B. Britle fracture<br />
C. Temper embritlemeot<br />
D. Stress rupture<br />
Question 24<br />
_____________ usually iccurs wheo a cilder liquid ciotacts a warmer metal surface.<br />
Aoswern D<br />
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A. Britle fracture<br />
B. Thermal fatgue<br />
C. Thermal shick<br />
D. Stress rupture<br />
Aoswern C<br />
Question 25<br />
Nickel based alliys usually ciotaio ________ oickel.<br />
A. ≥30%<br />
B. ≥20%<br />
C. ≥10%<br />
D. ≥12%<br />
Aoswern A<br />
Question 26<br />
_________ is a chaoge io the micristructure if certaio carbio steels aod 0.5Mi steels afer liogterm<br />
iperatio io the 800º F ti 1100º F raoge that may cause a liss io streogth, ductlity aod/ir<br />
creep resistaoce.<br />
A. Embritlemeot<br />
B. Carburiiatio<br />
C. Graphitiatio<br />
D. Seositiatio<br />
Aoswern C<br />
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