최신 API-571 무료덤프 - API Corrosion and Materials Professional
Susceptibility to sulfidation is determined by the _________ of the material.
정답: C
Stainless steels with sigma can normally withstand normal operating stresses but upon cooling to temperatures below _______ may show a complete lack of fracture toughness as measured by a Charpy impact test.
정답: B
Which if the following materials are not susceptible to hydrogen stress cracking?
정답: B
_________ is a mechanical form of degradation that occurs when a component is exposed to cyclical stresses for an extended period, often resulting in sudden, unexpected failure.
정답: B
Which of the following is not a critical factor that contributes to a brittle fracture?
정답: B
In HF service, carbon steel forms a protective fluoride scale in dry concentrated acid. Loss of the protective scale through high _________ or turbulence will result in greatly accelerated corrosion rates.
정답: C
With decarburization, the decarburized layer will be free of carbide phases. Carbon steel
will be ______.
will be ______.
정답: A
With high temperature hydrogen attack, ________ using a combination of velocity ratio and backscatter have been the most successful in finding cracking.
정답: D
Corrosion from oxygen tends to be __________ type damage and can show up anywhere even if only very small amounts break through the scavenging system.
정답: C
The primary factors affecting high temperature oxidation are metal temperature and _______.
정답: B
_________ is the result of cyclic stress caused by variations in temperature.
정답: D
The rate of creep deformation is a function of the material, load and temperature. The rate of damage is sensitive to both load and temperature. Generally, an increase of about _______ or an increase of ________ on stress can cut the remaining life in half.
정답: C
Cooling water corrosion can result in many different forms of damage including general corrosion, pitting corrosion, ________, stress corrosion cracking and fouling.
정답: A
__________ are the most common type of equipment susceptible to carburization in the refining industry.
정답: B
With creep, increased stress due to loss in thickness from corrosion will ________ time to failure.
정답: D
A 6", A106 Gr B, flanged line carrying caustic wash water at 200(o) F has signs of atmospheric corrosion. Which of the following may have help accelerate the corrosion?
정답: D
Which of the following materials is affected by high temperature corrosion?
정답: B
What method is most used to assure boiler feed water corrosion is not occurring?
정답: B
Surface initiated cracks caused by environmental cracking of 300 Series SS and some nickel based alloys under the combined action of tensile stress, temperature and an aqueous chloride environmental is called ________. The presence of dissolved oxygen ___________ the propensity for cracking.
정답: B