Ghana National Certificate II Welding and Fabrication preparation key terms

Shielded metal arc welding using a flux-coated consumable electrode, with actual classification and parameters governed by the relevant approved procedure.

Gas metal arc welding using a continuously fed consumable electrode and appropriate external shielding under specified process conditions.

Gas tungsten arc welding using a nonconsumable tungsten electrode, with separate filler added where the actual procedure requires it.

Base material altered by welding heat without being melted as weld metal, with properties influenced by material and thermal history.

A process-energy measure calculated using a stated formula and units, whose interpretation depends on whether efficiency and travel conditions are included.

The relevant temperature condition between weld passes, controlled according to the actual material and approved procedure rather than a universal number.

Incomplete joining at a relevant weld interface, distinct from gas porosity or a visible surface ripple alone.

Gas-related cavities in weld material whose cause and acceptance need assessment under the actual process and service requirements.

A method for suitable surface-breaking indications on appropriate nonporous materials, not a universal test for every internal discontinuity.

A method using magnetic effects to reveal relevant indications in suitable ferromagnetic materials, subject to technique and geometry limitations.

Evidence supporting a welding procedure within its applicable qualification basis, distinct from an individual welder’s performance qualification.

The link between recorded examination evidence and the actual weld, location, material, procedure, stage and accountable disposition.

The approved version of technical information for the actual task, preventing different workers from following incompatible dimensions, details or instructions.

A stated reference used to relate dimensions and locations consistently, rather than an arbitrary convenient edge selected independently for each part.

The specified physical size or relationship stated on a drawing, distinct from measuring a potentially rescaled printed image with a ruler.

The chosen extent of a model or task that determines which inputs, outputs, forces and responsibilities are included in the reasoning.

A characterization of the possible dispersion associated with a measurement result, distinct from the instrument’s smallest display increment.

A defined requirement used to judge appropriate evidence, which must not be replaced by an attractive appearance or an undocumented expectation.

A defined stage requiring appropriate verification or approval before work proceeds and makes the relevant feature difficult or impossible to inspect.

An accountable process for assessing and approving a departure from specified information, rather than silently substituting a convenient product or method.

The needed resistance to instability during an intermediate construction stage, which cannot be assumed from the completed structure’s final load path.

A protective measure selected for the actual hazard, equipment, conditions and competence, rather than a universal glove, distance or generic PPE instruction.

The amount calculated for the defined work before separately specified allowances, which must use consistent dimensions and measurement conventions.

Relevant records, observations, accepted conditions and unresolved issues communicated to the responsible recipient at completion, beyond a neat visible surface.