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Full Access API API-571 Tutorials

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Total 454 questions

Corrosion and Materials Professional Questions and Answers

Question 9

With sulfidation, the presence of oxygen ________ corrosion

Options:

A.

Increases

B.

Decreases

C.

Has no effect on

D.

Stops

Question 10

MIC is often characterized by _______ within pits in carbon steel.

Options:

A.

Oxide

B.

Tubercles

C.

Worm holes

D.

Cup shaped pits

Question 11

300 series stainless steel heater tubes in an oil-burning furnace in the hydrocracker began to leak and the furnace was brought down. What was the probable cause of the cracking?

Options:

A.

Chloride stress corrosion

B.

Polythionic acid stress corrosion

C.

Amine stress corrosion

D.

Stress oriented hydrogen induced cracking

Question 12

Improved resistance to erosion is usually achieved through increasing substrate ________ using harder alloys, hard facing or face-hardening treatment.

Options:

A.

Composition

B.

Stress

C.

Hardness

D.

None of the above

Page: 3 / 17
Total 454 questions