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Rigging, Hangers, and Supports 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 Rigging, Hangers, and Supports flashcards as text

  1. Pipe shoes (pipe saddles) are used on insulated lines primarily to:

    Answer: Transfer load to the support steel without compressing or damaging the insulation

    Pipe shoes extend below the insulation to rest on the support, keeping the insulation intact and continuous.

  2. The rated capacity of a synthetic web sling is reduced most significantly when the sling is used in a:

    Answer: Choker hitch

    A choker hitch reduces a synthetic sling's rated capacity to approximately 75–80% of its vertical hitch rating due to the choke point stress.

  3. When multiple pipe hangers are installed on a beam, the maximum spacing between supports is determined primarily by:

    Answer: Pipe material, diameter, operating temperature, and fluid weight

    Support spacing is calculated from allowable pipe sag (deflection) based on pipe size, wall thickness, material, and the combined weight of pipe, fluid, and insulation.

  4. A rigger observes that a load is drifting to one side during a crane lift. The correct action is to:

    Answer: Lower the load and rerig it correctly

    A load drifting sideways indicates the rigging attachment point is not directly above the load's center of gravity; the correct response is to lower and rerig.

  5. Variable spring hangers must be set to their 'cold' (installation) position before hydrostatic testing because:

    Answer: Water weight during testing is much greater than operating fluid weight

    Water is significantly heavier than most process fluids, so springs must be set for the cold/empty load to avoid overloading during the water-filled test.

  6. Which factor most directly determines the required hanger rod diameter for a given pipe support?

    Answer: The total load (pipe, fluid, insulation) carried by the rod

    Rod diameter is selected based on the total tensile load the rod must carry, which includes pipe weight, fluid weight, insulation weight, and any dynamic loads.

  7. Before a rigger uses a wire rope clip (U-bolt clip) to form an eye termination, the correct orientation requires:

    Answer: The U-bolt saddle on the dead (short) end of the rope

    The rule 'never saddle a dead horse' means the U-bolt (saddle) must bear on the dead (short) end, not the live load-bearing rope.