Electric Vehicle Service and Maintenance Technician Readiness Assessment for Automotive Workshops and ApprenticesThe plug is out. The pack is still live. What do you know for certain?
Forty exercises on what an electric-vehicle technician has to know before a pack is touched, while it is open and after it is closed: proving a system dead and what each reading proves, cell groups and the coolant loop, the motor and the inverter, AC and DC charging, and the record and the conversation that close a job. Reported as a warrant table that says, part by part, what your answers let you claim — and, before any number, that this is not a licence.
A table that says what you can claim, and a cut that admits how it was set
The Electric Vehicle Service and Maintenance Technician Readiness Assessment for Automotive Workshops and Apprentices is a thirty-minute knowledge check of what a technician must know before a high-voltage pack is touched, while it is open and after it is closed, reported as a warrant table that says what each part lets you claim.
Most technician quizzes print a percentage and a pass mark. This one prints, for each of five parts, the exercises it carried, its share of the overall score and why, its reliability as an assumed omega, its rung on a five-rung ladder or the printed refusal of one, and a column headed what this lets you say — in plain words, with the second half of every claim printed beside the first: you know what a supervised technician is expected to know about isolation, and nobody watched your hands. A part on eight exercises carries a wide band, and the page says so rather than hiding it.
The five parts follow the unit structure of the publicly registered qualification pack for an electric-vehicle service technician published by the National Skill Development Corporation with the Automotive Skills Development Council under the National Skills Qualifications Framework. That structure is a content map and nothing more: the instrument is not affiliated with, endorsed by or aligned to that qualification pack, its publishers, the sector skill council or any certifying body, a score here confers nothing under it, and every exercise is an original situation written for this instrument. It is named once, factually, in the methodology note.
The cuts between the rungs are set by a modified Angoff procedure on two defined standards, the supervised technician and the lead who signs the record, with the operational cut one standard error of judgment below the panel mean. And the report says, in the same type as the cuts, that the panel is declared and simulated: an authoring assumption standing in for experts who have not yet met, written into the seed so every number can be reproduced, and replaced the day a real panel rates the exercises. A rung is claimed only when the whole 95 per cent band lies inside it; otherwise the page says which two rungs the band crosses and prints the lowest one it clears.
Zero on every part is a typical respondent, not half marks. Every exercise carries a declared answer prior — the share of ordinary respondents expected to choose each option, tick each step, make each match or land on each value — and the score is corrected against it, so a fixed habit lands below zero rather than at it. Six formats, including ordering the steps of an isolation, matching a reading to what it proves and estimating a pack voltage on a slider, mean the habit being measured is what a technician does, not only what they can define.
Nothing here is a licence, a certification, a competency card or a permission to work on a high-voltage system, and it authorises nobody to touch a live pack. The report prints that before its first number, in the largest type on the page, alongside what it did not measure: the hands, the procedure under pressure, general automotive competence, and anything about character. No wiring regulation, standard number, manufacturer or vehicle appears anywhere in it.
What you walk away with
The order of an isolation, what the wait is for, why a zero between the poles is not a proof, what each pole-to-body and interlock reading proves, and what stops the work.
What a growing cell-group gap means, what a resting voltage does and does not tell you, how a pack is removed and stored, how a cooling fault is traced, and what a venting cell requires of everybody in the building.
Which checks are done with the system dead, what a start-up over-current and a pre-charge fault each point to, why a swapped phase is not a reversal, and why the 12 V side is checked before anything is opened.
Which path a fault lives on when AC fails and DC works, what the pilot signal sets, why a slow charge is usually a limit and not a fault, and how a charging diagnosis is ordered.
What the record has to let the next person prove, that a code which came and went is still written down, how a warning is refused without refusing the customer, and what a customer is owed when they ask about range.
One row per part: exercises, share and why, omega, rung or printed refusal, and what this lets you say. The Angoff cut table is printed with its assumptions and stamped as a declared, simulated panel that a real one will replace.
Inside your report
Illustrative sample — your report is generated from your own responses.
| Part | Omega | Figure | Rung or refusal |
|---|---|---|---|
| High-voltage safety and isolation | 0.727 | 44 | ◆ On a boundary: spanning above typical to lead standard |
| Battery pack and thermal system service | 0.700 | withheld | ○ Placement only: between typical and the supervised cut |
| Motor, controller and drivetrain checks | 0.727 | 67 | ◆ On a boundary: spanning supervised standard to ceiling |
A part on eight exercises carries a band about seventy points wide, so most rows cross a cut. The last column says the one thing the band supports, and beside it that nobody watched your hands.
| Scope | Standard | Panel mean | SD judges | SEJ | Operational | Cut |
|---|---|---|---|---|---|---|
| Overall | Supervised | 0.651 | 0.057 | 0.022 | 0.629 | 29 |
| Overall | Lead | 0.821 | 0.059 | 0.022 | 0.799 | 61 |
Declared, simulated panel: seven judges built from an authored estimate per exercise and a stated leniency offset each. No expert has met. A convened panel replaces every cut.
A rung is claimed only when the whole outlined box sits inside it. Otherwise the page names the two rungs the band crosses and the lowest one it clears.
Built for
- Electric-vehicle workshop technicians who want to know, part by part, what their knowledge lets them claim and what it does not
- Automotive apprentices and trainees moving from conventional vehicles to high-voltage work, before their first supervised isolation
- Workshop owners, service managers and service advisers deciding who is ready for supervised high-voltage work and who needs the classroom first
- Training centres and employers who want a readiness reading that says what it measured, what it did not, and how its cuts were set
Find out what your knowledge lets you say about a live pack, before anybody asks you to touch one
40 exercises across six formats · about 30 minutes · a warrant table on five parts of the work, a five-rung ladder with both bands drawn, and the cut table printed with its assumptions. Not a licence, and the report says so first.
₹499 (incl. GST) · assessment and full report, nothing further to pay
Frequently asked questions
No, and the report says so before it prints a single number, in the largest type on the page. It is a knowledge assessment. It is not a licence, a certification, a qualification, a competency card or a permission to work on any high-voltage system, and it authorises nobody to touch a live pack. Permission to do that comes from the workshop, its procedure and the person responsible for the site. The five parts follow a published qualification-pack unit structure for attribution only, with no affiliation and no alignment claimed.
One row per part of the work. Each row carries the exercises the part had, its share of the overall score and why, its reliability as an assumed omega, its rung on the five-rung ladder or the printed refusal of one, and a column headed what this lets you say, in plain words. Every claim in that column is printed with its second half beside it: what you know, and that nobody watched your hands.
By a modified Angoff procedure on two defined standards, the supervised technician and the lead who signs the record, with the operational cut one standard error of judgment below the panel mean. The report prints the panel mean, the spread across judges, the standard error and the operational cut for every part. It also says, in the same type, that the panel is declared and simulated: an authoring assumption written into the seed so every number can be reproduced, standing in for experts who have not yet met. A convened panel replaces every cut.
Because a rung is claimed only when the whole 95 per cent band lies inside it. Each part is scored on eight exercises, which carries a wide band, so most parts cross a cut. When that happens the page names the two rungs the band crosses and prints the lowest rung the whole band clears, because that is the only claim the band supports. A part with fewer than eight answered exercises, or too little internal agreement, carries a three-way placement in words and no number at all.
No. Every exercise is generic and original on purpose: no manufacturer, vehicle model, charger brand, wiring regulation, standard number or national rule is used as a key, and where a value matters it is stated in the exercise. It measures the underlying knowledge — proving a system dead, reading a pack, placing a charging fault, closing a record — not familiarity with any one product or rulebook.
Each one takes a single capability, puts you inside the situations where it is actually tested, and scores your choices against published evidence — with a report designed for that capability alone, not a template. They span hiring, compliance, education, operations and personal skill.
Browse the catalogue →Methodology: Forty original exercises across six formats: twelve single-choice questions on a reading, a symptom or a decision, eight true-or-false claims about how electric-vehicle systems behave, six select-every-that-applies exercises on the steps of an isolation, a removal, an inspection or a record, five ordering exercises for an isolation, a diagnosis and a handover, five match-the-following exercises pairing a reading or a symptom with what it proves or what causes it, and four numeric estimates on a slider. One response instruction is declared for the whole instrument and it is a KNOWLEDGE instruction: what is the right reading, step or reply here, never what the respondent would do on a hard day. Construct statement: this measures what a person knows about the service and maintenance of an electric vehicle's high-voltage systems, across five parts: high-voltage safety and isolation, battery pack and thermal system service, motor, controller and drivetrain checks, charging systems and diagnostics, and workshop records, handover and customer explanation. It is a knowledge assessment. It is NOT a licence, a certification, a qualification, a competency card or a permission to work on any high-voltage system, and it authorises nobody to touch a live pack; it does not measure whether the person can carry out an isolation with their hands, whether they would follow the procedure under time pressure, their competence as a general automotive technician or an electrician, or anything about their character. The five parts are organised on the publicly registered qualification-pack unit structure for an electric-vehicle service technician published by the National Skill Development Corporation with the Automotive Skills Development Council under the National Skills Qualifications Framework, whose national occupational standards are listed on the public National Qualifications Register. That structure is used as a content map only. This instrument is not affiliated with, endorsed by, aligned to, or derived from that qualification pack, its publishers, the sector skill council, any awarding or certifying body, or any manufacturer, and a score here confers nothing under it. Every exercise is an original work written for this instrument; no wiring regulation, standard number, national rule or manufacturer's procedure is used as a key, and where a value matters it is stated in the exercise. Scoring: every keyed exercise carries a declared answer prior, the share of ordinary respondents expected to choose each option, tick each option, make each match, place each position or land on each typical value, authored per exercise. Each part is scored as the mean quality over the exercises answered, corrected against the mean of those priors, so that zero is a respondent answering the way people typically answer; select-every exercises are scored as balanced accuracy so that ticking everything and ticking nothing score the same. An unanswered exercise leaves the numerator, the denominator and the chance term together and never scores zero. An empty sitting scores exactly zero. A sitting with fewer than twenty-four answered exercises is refused a report rather than given one on too little. The scoring design is a five-rung band ladder with cuts set by a modified Angoff procedure and placement governed by the standard error of measurement. Two standards are defined: the minimally competent technician for supervised high-voltage work, and the minimally competent technician who plans and leads an isolation and signs its record. For each exercise and each standard, seven simulated judges each state the share of credit such a technician would earn; the panel recommendation is the mean within judge and then across judges over the exercises answered, the standard error of judgment is the standard deviation of the judge means divided by the square root of seven, and the operational cut sits one standard error of judgment below the recommendation. THE PANEL IS DECLARED AND SIMULATED: the seven judges are an authoring assumption built from a stated central estimate per exercise and a stated leniency offset per judge with a small seeded deviation, written into the seed so every number can be reproduced. No panel of subject-matter experts has met. The report says so in the same type as the cuts, and a convened panel replaces every cut on this page when it meets. The four cuts are: the typical respondent at zero by construction of the null; the supervised-work operational cut; the lead operational cut; and a declared ceiling at ninety-five per cent of the credit available, transformed onto the same scale, above which the bank has nothing left to separate. The first three cuts come from the null and the panel; the ceiling is an authoring declaration and is printed as one. The reliability is McDonald's omega assumed from an inter-item correlation of .25 and the number of exercises answered, decided unrounded; the standard error of measurement is the declared standard deviation times the square root of one minus omega, and both the 68 and 95 per cent bands are printed. A rung is claimed only when the whole 95 per cent band lies inside it; otherwise the report says on the boundary between the two rungs it spans. A part with fewer than eight answered exercises or omega under .70 carries a three-way placement and no number, no band and no rung, and the refusal is printed in its row. The declared standard deviations come from a modelled reference sitting of mixed ability run through this instrument's own scorer and are assumptions that observed data will replace. No percentile appears anywhere, because there is no norm group. Sources drawn on: the practitioner literature on high-voltage vehicle isolation described generically (switch off, secure the disconnect, wait, prove dead with a proved instrument, pole to pole and pole to body; insulating gloves air-tested before every use and worn under protectors); Rasmussen, Skills, rules and knowledge: signals, signs and symbols (1983) and Klein, Sources of Power (1998) on diagnosis as hypothesis-driven work; Morris and Rouse, The effects of type of knowledge upon human problem solving in a process control task (1985) on one change at a time; Reason, Managing the Risks of Organizational Accidents (1997) and Dekker, The Field Guide to Understanding Human Error (2006) on procedure, record and the cause behind the symptom; Vetter et al., Ageing mechanisms in lithium-ion batteries, Journal of Power Sources (2005) and Birkl et al., Degradation diagnostics for lithium ion cells, Journal of Power Sources (2017) on capacity fade, storage state of charge and cell-group imbalance; Wang et al., Thermal runaway caused fire and explosion of lithium ion battery, Journal of Power Sources (2012) and Feng et al., Thermal runaway mechanism of lithium ion battery for electric vehicles: a review, Energy Storage Materials (2018) on venting and thermal runaway; Waldmann et al., Temperature dependent ageing mechanisms in lithium-ion batteries, Journal of Power Sources (2014) on low-temperature charging and lithium plating; Emadi, Advanced Electric Drive Vehicles (2015) and Hughes and Drury, Electric Motors and Drives (5th ed., 2019) on permanent-magnet drives, rotor position sensing, pre-charge and the DC link; Falvo et al., EV charging stations and modes: international standards, IEEE SPEEDAM (2014) on pilot signalling, current limits and AC against DC charging paths; Angoff, Scales, norms and equivalent scores, in Thorndike (ed.), Educational Measurement (1971) and Cizek and Bunch, Standard Setting (2007) on the modified Angoff procedure and the standard error of judgment; Hambleton and Slater, Reliability of credentialing examinations and the impact of scoring models and standard-setting policies, Applied Measurement in Education (1997) on placing a candidate against a cut with measurement error; McDonald, Test Theory: A Unified Treatment (1999) on omega; Haladyna, Downing and Rodriguez, A review of multiple-choice item-writing guidelines (2002) on distractor design; Gollwitzer and Sheeran, Implementation intentions and goal achievement (2006) on the if-then action; and Hattie and Timperley, The power of feedback (2007) on the structure of the report.