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Core Responsibilities Flashcards

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

Read the first 7 Core Responsibilities flashcards as text

  1. When installing a pump suction line, the preferred configuration to prevent cavitation is:

    Answer: Long, straight horizontal run with an eccentric reducer flat-side up

    An eccentric reducer installed flat-side up prevents air pockets from collecting at the pump suction and reduces cavitation risk.

  2. Which type of valve is BEST suited for throttling flow control in a process line?

    Answer: Globe valve

    Globe valves are designed for throttling because their disc moves perpendicular to flow, providing good control over partial openings.

  3. A pipefitter notices that a gasket is compressed beyond its recommended torque spec. What is the most likely consequence?

    Answer: Gasket blowout or extrusion leading to leakage

    Over-torquing a gasket causes it to crush, crack, or extrude beyond the flange face, resulting in leakage.

  4. What is the correct sequence for bolt tightening on a pipe flange connection?

    Answer: Tighten opposite bolts in a cross or star pattern

    Cross-pattern tightening ensures even gasket compression and prevents flange cocking or uneven seating.

  5. A pipefitter must select the correct pipe hanger spacing for a 4-inch schedule 40 carbon steel line carrying water. The primary factor governing maximum span is:

    Answer: The allowable sag and stress in the pipe between supports

    Hanger spacing is determined by allowable pipe deflection and bending stress, as specified in MSS SP-69 or ASME B31 codes.

  6. Which of the following is a pipefitter's responsibility when reviewing an isometric drawing before fabrication?

    Answer: Verifying dimensions, material specs, and weld symbols match the design intent

    Before fabrication, a pipefitter must confirm that dimensions, material callouts, and weld details on the iso match the piping specification and P&ID.

  7. What does PWHT stand for, and why is it performed on certain welds in pressure piping?

    Answer: Post-Weld Heat Treatment — to relieve residual stresses and restore toughness after welding

    PWHT reduces residual welding stresses and restores ductility, and is required by code for certain materials, wall thicknesses, and services.