Electrical and Electronics Fundamentals Assessment for Technicians, Apprentices and Maintenance TeamsA meter reading you trust and should not is the most expensive mistake in maintenance. Do you know which readings those are?

Methodology: Thirty-eight original exercises across five formats, interleaved so that no format runs for more than a few exercises: fourteen single-choice questions, eight true-or-false claims, six select-every-that-applies exercises, five match-the-following exercises and five numeric estimates on a slider. One response instruction is declared for the whole instrument and it is a KNOWLEDGE instruction: what the physics says happens, what an instrument actually measures and what current practice asks for, never what the respondent would personally do. Construct statement: this instrument measures what somebody knows about the physics of electrical circuits, measurement, motors, protection and fault location, at the level expected of a technician at the end of a first supervised year. It does not measure manual skill, safe working behaviour on a live installation, knowledge of any country's wiring regulations or colour code, speed of work, or fitness to hold any licence or role, and it is not a qualification. Five competencies are declared and each carries at least six exercises: circuit fundamentals, measurement and instruments, motors and drives, protection and earthing, and fault finding. Scoring is a band ladder with Angoff cuts and SEM honesty (playbook C14). A minimally competent candidate is defined in one sentence in the seed. Every exercise carries an authored Angoff estimate: the proportion of minimally competent candidates expected to answer it correctly. The unweighted mean of those estimates is the panel cut on the raw percent-correct scale. This is a one-judge Angoff with no panel, so there is no inter-rater reliability and no standard error of judgement can be computed; the report says so in plain words and prints the blank. In place of the conventional one-standard-error-of-judgement margin, a declared five raw points are subtracted to give the operational cut. The headline score is chance-corrected against the DECLARED answer prior authored on every option, every matching pair and every slider, so that zero is what a typical respondent scores rather than half marks; the cuts are transformed onto the same scale. Reliability is McDonald's omega estimated from item count and an assumed inter-item correlation of .22 until live data exists; SEM is the assumed raw-score SD times the square root of one minus omega; the 68 and 95 per cent bands are drawn and written on the report. A rung on the ladder is claimed only when the whole 95 per cent band lies inside it, otherwise the report names the two rungs it lies between. Every competency carries fewer than eight exercises and therefore a three-way placement against its own Angoff cut, never a number or a percentile, with the refusal printed. An unanswered exercise leaves both the numerator and the chance term, so a part-finished sitting is short rather than bad, and an empty sitting scores zero. A careless-responding flag count is computed for the operator and never shown to the candidate as a judgement. Every claim in the report is footnoted to the exercise, the option chosen and the option keyed (playbook D7). Fairness: physics and SI units only. No national wiring regulation, no country's conductor colour code, no supply voltage or frequency assumed to be universal, and no manufacturer or product named; where a voltage or frequency matters it is stated inside the exercise. Safety content is diagnostic and never an instruction to work on a live circuit. Keying sources: Ohm's and Kirchhoff's laws and the standard treatment of DC and AC circuit theory in Hughes, Electrical and Electronic Technology (Hiley, Brown and McKenzie Smith, current edition); Floyd, Principles of Electric Circuits; Boylestad, Introductory Circuit Analysis; the treatment of induction machines, slip, starting current, volts-per-hertz control and single phasing in Chapman, Electric Machinery Fundamentals and in Hughes and Drury, Electric Motors and Drives; the physics of overcurrent protection, earthing and residual current devices as set out in IEC 60364 (Low-voltage electrical installations) and IEC 61008 and 61009 (residual current operated circuit-breakers), cited for the physics and not for any national adoption of them; meter loading, average-responding versus true-RMS measurement and phantom voltage as treated in Witte, Electronic Test Instruments: Analog and Digital Measurement Techniques, and in Bakshi and Bakshi, Electrical Measurements and Instrumentation; the time-current characteristics of miniature circuit breakers in IEC 60898; the half-split and voltage-pattern methods of fault location described in Mazur and Proctor, Troubleshooting Electrical/Electronic Systems, and in Bird, Electrical Circuit Theory and Technology; the Angoff method as described by Angoff (1971) and the modified Angoff procedure in Cizek and Bunch, Standard Setting; the SEM and band-placement treatment in Harvill (1991), Standard Error of Measurement, and in the Standards for Educational and Psychological Testing (AERA, APA and NCME, 2014); McDonald (1999), Test Theory, for omega; and Haladyna, Downing and Rodriguez (2002) for the item-writing rules the distractors follow. All exercises are original works. No textbook, examination board, training provider, standards body, manufacturer or certification scheme's questions, marks or report layouts are reproduced, and no affiliation, accreditation or endorsement by any of them exists or is claimed. The IEC standards are cited as the source of the physics only; this instrument is not a test of compliance with them.