Reliable API API-571 Dumps Questions | API-571 Test Sample Questions

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What is the duration of the API-571 Exam

Number of Questions: 70
Length of Examination: 3.25 hours
Format: Multiple choices, multiple answers

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API-571 Exam Reference

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100% Pass API - API-571 - Efficient Reliable Corrosion and Materials Professional Dumps Questions

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API Corrosion and Materials Professional Sample Questions (Q13-Q18):

NEW QUESTION # 13
The effects of hydrogen embrittlement ___________ with _________ temperatures.

A. Decrease, increasing
B. Decrease, decreasing
C. Increase, decreasing
D. Increase, increasing

Answer: A

NEW QUESTION # 14
The best method for finding damage from sigma phase embrittlement is:

A. Metallographic testing
B. Magnetic particle testing
C. Ductility testing
D. Hardness testing

Answer: A

Explanation:
As per API RP 571 on Sigma Phase Embrittlement:
"Sigma phase embrittlement occurs in stainless steels and nickel-based alloys due to the formation of a brittle intermetallic phase in the temperature range of 1050°F to 1650°F (565°C to 900°C)."
"This damage mechanism is not easily detected through surface or hardness testing and typically requires metallographic examination to confirm the presence of sigma phase in the microstructure." Metallographic testing allows clear identification of sigma phase particles and is thus the most reliable method, making option D correct.

NEW QUESTION # 15
Titanium Hydriding damage occurs primarily in sour water strippers and amine units in the overhead condensers, heat exchanger tubes and other titanium equipment operating above _________.

A. 300º F
B. 210º F
C. 270º F
D. 165º F

Answer: D

NEW QUESTION # 16
With sulfuric acid corrosion, carbon steel corrosion rates increase significantly if the flow velocity exceeds about ________m fps or at acid concentrations below _________.

A. 6-9, 80%
B. 4-6, 85%
C. 5-7, 75%
D. 2-3, 65%

Answer: D

NEW QUESTION # 17
Carbonate stress corrosion cracking and alkaline stress corrosion cracking are:

A. Not preventable by post-fabrication stress relieving of weldments.
B. Closely related corrosion mechanisms.
C. Different only in the level of alkalinity needed to initiate attack.
D. Mechanisms that affect carbon steels and austenitic stainless steels.

Answer: B

Explanation:
In API RP 571, Carbonate SCC and Alkaline SCC are both discussed under mechanisms that occur in basic (high pH) environments, often with similar contributing conditions and prevention methods. The document highlights:
"Carbonate SCC is considered a subcategory of alkaline stress corrosion cracking. It results from the concentration of alkaline carbonates under thermal insulation or deposits."
"Both mechanisms involve the same key parameters: elevated temperatures, tensile stress, and high pH solutions." (Reference: API RP 571, 3rd Edition, Section 4.2.2.4 and 4.2.2.3) Because these mechanisms share similar material susceptibility and operating conditions, they are indeed closely related-option B is therefore the accurate and supported answer.

NEW QUESTION # 18
......

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