Ghana National Certificate II Welding and Fabrication preparation flashcards
Ghana National Certificate II Welding and Fabrication preparation · Build recall with a focused review session.
24 cards. Read the term and the definition here. The deck at the top of this page is optional.
- SMAW
- Shielded metal arc welding using a flux-coated consumable electrode, with actual classification and parameters governed by the relevant approved procedure.
- GMAW
- Gas metal arc welding using a continuously fed consumable electrode and appropriate external shielding under specified process conditions.
- GTAW
- Gas tungsten arc welding using a nonconsumable tungsten electrode, with separate filler added where the actual procedure requires it.
- Heat-affected zone
- Base material altered by welding heat without being melted as weld metal, with properties influenced by material and thermal history.
- Heat input
- A process-energy measure calculated using a stated formula and units, whose interpretation depends on whether efficiency and travel conditions are included.
- Interpass temperature
- The relevant temperature condition between weld passes, controlled according to the actual material and approved procedure rather than a universal number.
- Lack of fusion
- Incomplete joining at a relevant weld interface, distinct from gas porosity or a visible surface ripple alone.
- Porosity
- Gas-related cavities in weld material whose cause and acceptance need assessment under the actual process and service requirements.
- Liquid penetrant examination
- A method for suitable surface-breaking indications on appropriate nonporous materials, not a universal test for every internal discontinuity.
- Magnetic particle examination
- A method using magnetic effects to reveal relevant indications in suitable ferromagnetic materials, subject to technique and geometry limitations.
- Procedure qualification
- Evidence supporting a welding procedure within its applicable qualification basis, distinct from an individual welder’s performance qualification.
- Inspection traceability
- The link between recorded examination evidence and the actual weld, location, material, procedure, stage and accountable disposition.
- Controlled revision
- The approved version of technical information for the actual task, preventing different workers from following incompatible dimensions, details or instructions.
- Datum
- A stated reference used to relate dimensions and locations consistently, rather than an arbitrary convenient edge selected independently for each part.
- Written dimension
- The specified physical size or relationship stated on a drawing, distinct from measuring a potentially rescaled printed image with a ruler.
- System boundary
- The chosen extent of a model or task that determines which inputs, outputs, forces and responsibilities are included in the reasoning.
- Measurement uncertainty
- A characterization of the possible dispersion associated with a measurement result, distinct from the instrument’s smallest display increment.
- Acceptance criterion
- A defined requirement used to judge appropriate evidence, which must not be replaced by an attractive appearance or an undocumented expectation.
- Hold point
- A defined stage requiring appropriate verification or approval before work proceeds and makes the relevant feature difficult or impossible to inspect.
- Change control
- An accountable process for assessing and approving a departure from specified information, rather than silently substituting a convenient product or method.
- Temporary stability
- The needed resistance to instability during an intermediate construction stage, which cannot be assumed from the completed structure’s final load path.
- Task-specific control
- A protective measure selected for the actual hazard, equipment, conditions and competence, rather than a universal glove, distance or generic PPE instruction.
- Net quantity
- The amount calculated for the defined work before separately specified allowances, which must use consistent dimensions and measurement conventions.
- Handover evidence
- Relevant records, observations, accepted conditions and unresolved issues communicated to the responsible recipient at completion, beyond a neat visible surface.