1. Home
  2. API
  3. API-571

Corrosion and Materials Professional

Exam Details

  • Exam Code
    :API-571
  • Exam Name
    :Corrosion and Materials Professional
  • Certification
    :API Certifications
  • Vendor
    :API
  • Total Questions
    :454 Q&As
  • Last Updated
    :Jun 28, 2025

API API Certifications API-571 Questions & Answers

  • Question 261:

    Which of the following materials is least affected by brittle fracture?

    A. Carbon steel

    B. Chromes

    C. 300 series stainless steel

    D. 400 series stainless steel

    E. All stainless steels

  • Question 262:

    A prime location for erosion is:

    A. In catalyst piping.

    B. Downstream of a gate valve.

    C. Any superheated steam piping.

    D. Upstream of a pump.

  • Question 263:

    Protection in a boiler from boiler feed water corrosion is accomplished by:

    A. Injecting chlorines to kill microbiological bugs.

    B. Injecting caustic to lower the ph to < 4.0.

    C. Lowering solids content in boiler feed water to less than 50 ppm.

    D. Maintaining a protective corrosion layer of magnetite (Fe3O4).

  • Question 264:

    For pressure vessels, inspection should focus on welds of ________ operating in the creep range.

    A. CrMo alloys

    B. Carbon steel

    C. Stainless steel D. Low hydrogen electrodes

  • Question 265:

    Cooling water corrosion is a concern with water-cooled __________ and cooling towers in all applications across all industries.

    A. Pumps

    B. Vessels

    C. Piping

    D. Exchangers

  • Question 266:

    Caustic is sometimes added to process streams for ________ or as a reactant.

    A. Stability

    B. Corrosion control

    C. Neutralization

    D. Inhibiting

  • Question 267:

    At a given pressure, the H²S concentration in the sour water _________ as temperature _________.

    A. Increases, increases

    B. Decreases, decreases

    C. Increases, decreases

    D. Decreases, increases

  • Question 268:

    Ferritic stainless steels are usually not used in __________ applications.

    A. Non-pressure boundary

    B. Pressure boundary

    C. High temperature

    D. Low temperature

  • Question 269:

    A brittle fracture:

    A. Is caused by stress cycles.

    B. Is always the result of thermal stresses.

    C. Grow very rapidly with minimum deformation prior to failure.

    D. Grows slowly and is dependent on time and stress.

  • Question 270:

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

    A. Lower

    B. Higher

    C. Sulfidization

    D. Hydrogen corrosion

Related Exams:

Tips on How to Prepare for the Exams

Nowadays, the certification exams become more and more important and required by more and more enterprises when applying for a job. But how to prepare for the exam effectively? How to prepare for the exam in a short time with less efforts? How to get a ideal result and how to find the most reliable resources? Here on Vcedump.com, you will find all the answers. Vcedump.com provide not only API exam questions, answers and explanations but also complete assistance on your exam preparation and certification application. If you are confused on your API-571 exam preparations and API certification application, do not hesitate to visit our Vcedump.com to find your solutions here.