NABTEB Automobile Electrical Works case studies
NABTEB Automobile Electrical Works · Put your knowledge to work in context.
NABTEB Automobile Electrical Works is a Nigerian trade credential for people who service, diagnose and repair the electrical systems of cars, buses, trucks and light commercial vehicles. Candidates are typically apprentices in roadside or fleet workshops, technicians in company garages, or students in technical colleges and vocational centres who want a recognised qualification rather than only on-the-job experience. The assessment combines multiple-choice questions, written theory and a practical trade test, so it rewards both book knowledge and hands-on skill. The syllabus is built around the vehicle as a working electrical system: basic electrical principles and circuits, batteries and charging, starting, ignition, lighting and signalling, wiring and protection, accessories, fault finding, workshop safety and tool use, and the drawing, measurement and trade science that support all of it. The NABTEB Automobile Electrical Works case studies are 5 cases and about 2,855 words.
1Shared Earth Return on a Light Truck
A light truck owner complains that the headlamps are dim at idle and brighten when the engine is revved. He also notices that the blower slows noticeably whenever the headlamps are switched on.
631 words, about 3 min2Overnight Battery Drain on a Petrol Saloon
A 2015 petrol saloon with a 60 Ah, three-year-old lead-acid battery will not start after standing overnight. The battery was recharged and reads 12.4 V at rest.
549 words, about 3 min3Hot Slow-Crank on a Petrol Car
A 2.0-litre petrol car cranks slowly only when the engine is hot; from cold it starts normally. The battery is 12.6 V at rest and passes a load test.
547 words, about 3 min4Load-Dependent Misfire on a Four-Cylinder Engine
A 1.6-litre four-cylinder petrol engine with a distributor ignition system misfires under acceleration and when climbing a hill. At idle it is smooth.
538 words, about 3 min5Adding Driving Lamps to an Existing Harness
A farmer wants two 100 W halogen driving lamps added to a 12 V negative-earth pickup. He proposes tapping into the existing headlamp circuit at the dash switch.
590 words, about 3 min