WBBSE Madhyamik Vocational Automobile study guide
WBBSE Madhyamik Vocational Automobile · Work through your exam, one topic at a time.
The WBBSE Madhyamik Vocational Automobile credential is a secondary-level vocational qualification offered through the West Bengal Board of Secondary Education's vocational stream. It is designed for students who take Automobile as their vocational subject alongside the regular Madhyamik curriculum, and it signals that a learner has grasped basic workshop practice, engine and vehicle systems, and the safety and environmental habits expected in a garage or service centre. The WBBSE Madhyamik Vocational Automobile study guide has 9 sections and about 2,995 words.
01Automobile Workshop Safety and Tools
This domain tests workshop discipline and tool knowledge: the personal-protective and fire rules that keep a bay safe, how a vehicle is raised and supported, and how hand tools and torque wrenches are chosen and used. Questions here are practical rather than theoretical.
366 words, about 2 min02Automotive Engine Fundamentals
This domain checks whether you understand how a reciprocating engine turns fuel energy into crankshaft rotation, and whether you can handle the standard terms - bore, stroke, swept volume, clearance volume and compression ratio - numerically. Induction: the piston moves down from top dead centre (TDC) with the inlet valve open, drawing in air or an air–fuel mixture.
331 words, about 2 min03Fuel and Lubrication Systems
This domain tests the petrol and diesel fuel circuits, the meaning of octane and cetane numbers, and the job of engine oil, its viscosity grades and its service intervals. Petrol: tank → electric fuel pump → filter → carburettor or MPFI injectors → inlet manifold; a three-way catalytic converter needs closed-loop mixture control to work.
327 words, about 2 min04Transmission, Steering, and Suspension
This domain covers how engine torque reaches the wheels, how the driver steers, and what carries the vehicle's weight and absorbs road shocks. Clutch: single dry plate.
332 words, about 2 min05Braking Systems and Vehicle Control
This domain tests the hydraulic braking circuit, the difference between disc and drum brakes, the role of ABS and the parking brake, and how speed, reaction time and friction decide stopping distance. Pedal → master cylinder → pipes and hoses → wheel cylinders or calipers.
317 words, about 2 min06Automotive Electrical and Electronics
This domain tests the 12 V lead-acid battery, charging and starting circuits, ignition, lighting, and the electronic control units and sensors that manage a modern engine. Six cells at about 2.1 V each give 12.6 V at rest; a healthy cell reads about 1.26–1.28 specific gravity on a hydrometer, corrected for temperature.
342 words, about 2 min07Vehicle Maintenance and Servicing
This domain tests the routine checks and scheduled services that keep a vehicle safe, economical and legal, and the record-keeping that supports them. Daily or pre-drive: engine oil, coolant, brake fluid, tyre pressures and condition, lights, horn, wipers, and any leak under the vehicle.
316 words, about 2 min08Automotive Materials and Measurement
This domain tests the metals, alloys and non-metals used in vehicle construction, and the measuring instruments used to check them to a hundredth of a millimetre. Mild steel for frames and brackets; high-carbon steel for springs, chisels and files; alloy steel for gears and crankshafts; cast iron for cylinder blocks and brake drums because it damps vibration and resists wear; aluminium alloys for pistons and cylinder heads because they are light and conduct heat well; copper for wiring, brass for radiator cores, white metal (babbit) for bearings; cork, rubber and multi-layer steel for gaskets.
319 words, about 2 min09Environmental and Work Ethics
This domain tests what a vehicle emits and how emissions are controlled, and the professional conduct expected of a technician towards customers, colleagues and the environment. Petrol exhaust contains CO, HC, NOx and CO2; diesel adds particulate matter and smoke.
345 words, about 2 min