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Quality Control and Materials Flashcards

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

Read the first 7 Quality Control and Materials flashcards as text

  1. What is the primary function of a quality management system (QMS) as required by API Q1?

    Answer: To provide a framework ensuring products and services consistently meet customer and regulatory requirements

    API Q1 specifies requirements for a QMS that ensures consistent product quality, continual improvement, and compliance with applicable standards.

  2. In dye penetrant testing (PT), after applying the penetrant and the dwell time has elapsed, what is the next step?

    Answer: Remove excess penetrant and apply developer

    After the penetrant dwell time, excess penetrant is removed from the surface before developer is applied to draw out and reveal trapped penetrant.

  3. According to API standards, what is 'positive material identification' (PMI)?

    Answer: Verifying alloy composition using XRF or OES to confirm material grade

    PMI uses analytical techniques like X-ray fluorescence (XRF) or optical emission spectroscopy (OES) to verify alloy chemical composition in the field.

  4. What is 'hydrogen-induced cracking' (HIC) and in which environments does it commonly occur in oil and gas?

    Answer: Cracking caused by atomic hydrogen absorbed in wet H₂S service, leading to blistering and stepwise cracking

    HIC occurs when atomic hydrogen from wet H₂S service enters steel and recombines at internal defects, generating pressure that causes blistering and stepwise cracking.

  5. What does 'NACE MR0175/ISO 15156' specify in relation to oil and gas quality?

    Answer: Materials requirements for equipment used in H₂S-containing (sour) environments

    NACE MR0175/ISO 15156 defines materials requirements and testing methods to prevent sulfide stress cracking in sour oil and gas production environments.

  6. In welding quality control, what is the difference between a Welding Procedure Specification (WPS) and a Procedure Qualification Record (PQR)?

    Answer: A WPS is the written instruction; a PQR is the test record that supports and qualifies the WPS

    The WPS provides welding parameters and instructions, while the PQR documents the actual test weld data and test results that demonstrate the WPS produces sound welds.

  7. When inspecting flanged connections, which condition would be cause for rejection according to API piping inspection standards?

    Answer: Raised face flange surface showing radial scratches across the seating surface

    Radial scratches across the gasket seating surface create leak paths and can prevent proper sealing, making the flange face unacceptable without reconditioning.