API-571 Exam Practice Test Instant Access

Question 1

Sulfidation is primarily caused by:

AImpacting particles.

BSulfur compounds decomposing at higher temperatures.

CSulfur compounds being created in the FCCU (Cat Cracking Unit).

DElemental sulfur collecting in stagnate areas, e.g. dead legs.

EOperators failing to adequately control the ph of sulfur streams.

Answer : B

Question 2

Which of the following is not a primary factor contributing to erosion?

AImpact angle (angle that impacting particles strike metal)

BSize of impacting particles

CVelocity of impacting particles

DDensity of impacting particles

ECorrosiveness of the environment

Answer : E

Question 3

The removal of a material's protective scale by impacting materials is called:

AErosion

BErosion-corrosion

CErosion or erosion-corrosion

DIPRSC (imparting particle removal of scale corrosion)

Answer : B

Question 4

The removal of surface material by impacting materials is called:

AErosion

BErosion corrosion

CErosion or erosion corrosion

DIPC (imparting particle corrosion)

Answer : A

Question 5

Thermal fatigue becomes of concern if the temperature swings exceed:

A50 oF.

B100 oF.

C200 oF.

D400 oF.

Answer : C

Question 6

A carbon steel bundle from the overhead condenser in the crude unit operates at 300 F and is in hydrochloric acid service. It showed severe pitting type corrosion when pulled for inspection. What type of material would be best suited for this service?

A5Cr-0.5Mo

B316 stainless steel

C9Cr-1Mo

DTitanium

Answer : D

Question 7

Which of the following materials are the least susceptible to caustic embrittlement?

ACarbon steel

BStainless steel

C9Cr-0.5 Mo

DNickel base alloys

Answer : D

API-571 Corrosion and Materials Exam Practice Test