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Which equipment straightens a damaged unitary body?

  • A.A welding set
  • B.A heat gun, which softens the metal sufficiently for it to be pulled back into shape by hand without any equipment
  • C.A bench with hydraulic pulling towers
  • D.A hydraulic press, which applies a compressive force to the deformed panel in order to restore its original shape

Answer: C

The shell is clamped to a bench that holds the undamaged datum points and hydraulic towers pull the deformed structure back to its measured position. Measurement continues throughout the process. Heating modern high strength steels destroys their properties and is prohibited on many members, which is why sectioning and replacement is often specified instead. Reading the definition literally, rather than recalling a formula, is the reliable route through questions of this shape.

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