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API
Corrosion and Materials certification
API-571 Free Questions
API API-571 Quiz:2 Topic:1 Questions:6-10

Home
API
Corrosion and Materials certification
API-571 Free Questions
API API-571 Quiz:2 Topic:1 Questions:6-10

API API-571 Quiz:2 Topic:1 Questions:6-10

Free Practice Mock Questions Set 6-10 (Quiz # 2) for API-571 Exam, according to official API Corrosion and Materials exam syllabus topic # 1

Question: 1

A vacuum tower operating at 740 F is being entered to inspect. Several sets of Type 410 SS trays are bent at various angles. The trays are removed in order to straighten them. When an attempt is made to straighten them cracks form at the bends. What type of damage mechanism would cause the cracks to form?

AHydrogen embrittlement

BSulfide stress corrosion cracking

C885 F embrittlement

DHigh temperature corrosion

Answer : C

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Question: 2

In most cases, brittle fracture occurs only at temperatures below the Charpy impact transition temperature. Steel cleanliness and ________ have a significant influence on toughness and resistance to brittle fracture.

AAlloy composition

BTensile strength

CGrain size

DPressure

Answer : C

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Question: 3

In piping and equipment, creep cracking can occur where high metal temperatures and _________ occur together. Creep cracking, once initiated, can progress rapidly.

APressures

BStress risers

CVelocities

DNone of the above

Answer : B

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Question: 4

_________ corrosion rates are found in a gas oil desulfurizers and hydrocrackers than naphtha desulfurizers and hydrocrackers by a factor of almost ''2''.

ALower

BHigher

CSulfidization

DHydrogen corrosion

Answer : B

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Question: 5

A 6'', A106 Gr B, flanged line carrying caustic wash water at 200 F has signs of atmospheric corrosion. Which of the following may have help accelerate the corrosion?

ASulfides

BFly ash

CCaustic

DNone of the above

Answer : B

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