Meisterprüfung Metalltechnik common mistakes
Meisterprüfung Metalltechnik · Understand the traps and how to avoid them.
When calculating a cutting speed or feed rate, the candidate substitutes diameter in centimetres or millimetres without converting, and reports the spindle speed in the wrong unit (e.g. min⁻¹ versus s⁻¹).
Formula collections are memorised as symbol strings (vc = π·d·n) without tracking units; under time pressure the candidate plugs numbers straight into the calculator and never writes the unit next to each quantity.
What to do instead
Always write the formula with units attached (vc in m/min, d in m, n in min⁻¹), convert d to metres before dividing, and carry units through every intermediate line. Finish with a plausibility check: a 10 mm drill in steel should land near 1000 min⁻¹, not 10 or 100 000.
On a technical drawing task the candidate omits or misplaces the datum references and tolerance symbols, or mixes up the ISO fit designation (e.g. writes H7/h6 where the drawing requires an interference fit).
The candidate reads the drawing as a picture rather than as a specification; hole-basis and shaft-basis systems are learned as tables to memorise rather than as a logic, so the direction of the tolerance is guessed.
What to do instead
Before drawing, list every functional requirement as a sentence ('the bearing outer ring must be a light press fit'), then derive the fit from the hole-basis system deliberately. Practise reading an existing drawing and naming datum A, B, C and each tolerance frame out loud before producing your own.
In the materials question the candidate names a steel grade (e.g. S235JR or C45) but cannot state its yield strength, its heat-treatment condition, or why it is unsuitable for a given load case, and confuses tensile strength with yield strength.
Material designations are memorised as labels without the underlying property set; the candidate never links the designation to the standard's property table or to the application.
What to do instead
Build a one-page property card for each of the ten grades you are most likely to be asked about: designation breakdown, Rm, Re, hardness, weldability, typical use. When answering, always quote the property and then the consequence ('Re = 235 N/mm², so at 200 N/mm² service stress the safety factor is only 1.17 - too low for a dynamic load').
When selecting a welding process and parameters the candidate gives a current value without electrode diameter, material thickness, joint type or position, and does not mention preheating or interpass temperature for a thick or high-carbon joint.
Welding parameters are recalled as single numbers from a table rather than as a set of coupled decisions; the candidate treats the question as 'name a current' instead of 'justify a process chain'.
What to do instead
Answer in a fixed four-step structure: joint and material → process and consumable → parameter set (current, voltage, speed, gas, electrode diameter) → heat control and post-weld measures. State the thickness and position explicitly, and justify each parameter with the reason it changes.
In the cost-calculation task the candidate computes the hourly machine rate from depreciation alone, forgets the imputed entrepreneur's wage, space cost and repair allowance, and then prices the job without material overhead, scrap allowance or risk.
The candidate confuses the calculation scheme with a single formula; overhead surcharges are added ad hoc at the end instead of being applied at the correct stage of the scheme.
What to do instead
Write the full scheme out before touching numbers: direct material → material overhead → direct labour → machine cost → production overhead → special direct costs → admin and sales overhead → profit. Check that every surcharge has an explicit base, and sanity-check the result against a known market price for a comparable job.
When asked about a contract or liability case the candidate answers with general fairness language ('the customer has to pay because he ordered it') instead of naming the legal basis - offer and acceptance, defect versus damage, the limitation period, or the applicable warranty regime.
Legal topics are studied as background reading rather than as a decision tree; the candidate has no routine for identifying which branch of law (BGB sale contract, Werkvertrag, commercial code) governs the case.
What to do instead
For every case, first classify the contract type, then the defect category (Sachmangel, Rechtsmangel), then the remedy and the limitation period. Answer with the paragraph-level structure in keywords: 'Werkvertrag → Abnahme → Mängelhaftung → Fristsetzung → Rücktritt oder Minderung', and only then add the practical conclusion.
In the labour and social law section the candidate misstates the notice periods, the role of the works council, or the difference between ordinary and extraordinary termination, and confuses the probationary period rules with the general notice period.
The candidate has picked up terms from workplace conversation without the statutory framework, so similar-sounding concepts (Kündigung versus Aufhebungsvertrag, Warnung versus Abmahnung) are blended together.
What to do instead
Learn a compact matrix: contract type, probation, statutory notice period by length of service, role of the works council, and the sequence of an Abmahnung. Rehearse by writing the timeline for one concrete dismissal case from first warning to termination letter.
In the vocational education section the candidate describes a training method in general terms but cannot name the four-step method's stages, the learning objectives taxonomy level, or the legal basis of the training contract and the trainee's duties.
Berufs- und Arbeitspädagogik is treated as the soft topic and revised last; the candidate has read about it but never structured an answer around a specific training situation.
What to do instead
Prepare a template for the four-step method (prepare, demonstrate, imitate and explain, practise and consolidate) and for one learning-objective formulation with a measurable verb. For the contract part, list the mandatory contents of the training contract and the trainee's duties in writing once.
On the occupational safety question the candidate names a hazard but stops there, without stating the protective measure in the correct hierarchy (eliminate, substitute, technical, organisational, personal) or the legal source (Arbeitsschutzgesetz, Betriebssicherheitsverordnung, DGUV rules).
The candidate answers from experience ('wear gloves') and skips the systematic hazard assessment, so the answer is a collection of measures rather than a reasoned risk assessment.
What to do instead
Answer in the fixed sequence: hazard identification → risk evaluation → measure by the STOP hierarchy → residual risk → effectiveness check. Always name the legal basis and the required document (Gefährdungsbeurteilung, Betriebsanweisung, Unterweisung) alongside the measure.
In the master project presentation the candidate presents the technical solution in detail but cannot state the project's goal, the chosen alternative and why the others were rejected, the cost and schedule outcome, or the documentation trail - and runs over time without a rehearsal.
The project is treated as a workshop task rather than as a managed project; there is no written project order, no milestone plan and no rehearsal, so the presentation is improvised from memory.
What to do instead
Write a one-page project order at the start (goal, scope, deliverables, milestones, budget, risk), keep a dated decision log, and rehearse the presentation three times against a hard timer with a fixed slide skeleton: problem, goal, alternatives, solution, cost and schedule, result, lessons learned.