Practice Test Geeks(SPED) Society of Piping Engineers and Designers Certification Practice Test
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Corrosion Prevention & Protection Flashcards

7 cards from real SPED practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. Which standard governs external corrosion control for underground or submerged metallic piping systems in the United States?

    Answer: NACE SP0169

    NACE SP0169 (formerly RP0169) is the industry standard for control of external corrosion on underground or submerged metallic piping systems.

  2. Microbiologically influenced corrosion (MIC) in pipelines is most commonly caused by which type of bacteria?

    Answer: Sulfate-reducing bacteria (SRB)

    Sulfate-reducing bacteria (SRB) are the most common cause of MIC in pipelines; they produce H2S as a metabolic byproduct, which aggressively attacks steel.

  3. In pipeline design, what is the primary purpose of an electrical isolation fitting (insulating flange or coupling)?

    Answer: Electrically separate segments to allow independent cathodic protection

    Isolation fittings electrically separate pipeline sections to prevent cathodic protection current from leaking to adjacent structures and to allow independent CP systems.

  4. What does the term 'holiday' refer to in pipeline coating inspection?

    Answer: A defect, pinhole, or void in the coating

    A holiday is a defect in a protective coating — a pinhole, void, or area of disbondment — where the metal is exposed to the environment.

  5. Erosion corrosion in piping systems is most likely to occur at which locations?

    Answer: Elbows, tees, reducers, and areas of high-velocity turbulent flow

    Erosion corrosion is accelerated at flow disturbances such as elbows, tees, and reducers where high-velocity turbulent flow mechanically removes protective films and metal.

  6. What is the main advantage of zinc sacrificial anodes over magnesium anodes for cathodic protection in seawater?

    Answer: Zinc has a longer service life and lower consumption rate in seawater

    Zinc anodes have a lower consumption rate and more stable performance in seawater environments, providing efficient long-life protection compared to magnesium.

  7. Which in-line inspection (ILI) tool is specifically designed to detect internal and external metal loss from corrosion?

    Answer: Magnetic flux leakage (MFL) tool

    Magnetic flux leakage (MFL) tools detect metal loss by measuring flux leakage fields caused by corrosion-induced wall thickness reductions in ferromagnetic pipelines.