WBBSE Madhyamik Vocational Automobile study plan

Identify and label the main components of a four-stroke petrol engine (cylinder block, piston, connecting rod, crankshaft, camshaft, valves) on a sketch you draw from memory

Describe the four strokes of both petrol and diesel cycles in sequence, stating what each valve is doing and why the diesel cycle has no spark plug

List ten workshop hazards (fuel spill, rotating shaft, hot exhaust, battery acid, jack collapse, etc.) and state one preventive action for each

Demonstrate the safe handling sequence for a hydraulic jack and axle stands, including where to place stands under a chassis

Explain the difference between a live axle and a dead axle and give one vehicle example of each

Explain valve timing, valve overlap and tappet clearance, and state why clearance changes with engine temperature

Distinguish SI and CI combustion by compression ratio, fuel ignition method and typical air-fuel ratio

List the correct sequence of steps to measure a cylinder bore with a bore gauge and an outside micrometer, including zeroing the micrometer

Convert at least eight measurements between mm, cm and inch using the 25.4 mm = 1 inch factor without a calculator error

Name four engine component materials (cast iron block, aluminium alloy head, forged steel crankshaft, bronze bush) and give one property that justifies each choice

Trace the fuel path from tank to combustion chamber in a carburetted petrol engine and in a common-rail diesel, naming each component in order

Explain the function of the fuel filter, fuel pump and air cleaner and state one symptom of a clogged filter in each case

Describe the properties of engine oil (viscosity, viscosity index, detergency) and decode an SAE 15W-40 grade in your own words

Outline a 10,000 km periodic service checklist covering engine oil and filter, air filter, coolant, belts and tyre pressures

Explain why overfilling engine oil is harmful and what a milky emulsion on the dipstick indicates

Explain the power flow through clutch, gearbox, propeller shaft and differential in a rear-wheel-drive vehicle, naming the function of each unit

Describe how a manual clutch engages and disengages, and state three signs of a worn clutch plate

Explain the purpose of wheel alignment (camber, caster, toe-in) and what happens to tyre wear if toe-in is incorrect

Compare disc and drum brakes in construction and state one advantage of each for a small car

Describe the bleeding sequence for a hydraulic brake system and explain why air in the lines makes the pedal spongy

Explain the role of the master cylinder, wheel cylinder and brake fluid in transmitting pedal force

Identify the parts of a lead-acid battery (plates, separators, electrolyte, terminals) and state the correct procedure for checking specific gravity with a hydrometer

Explain the function of the starter motor, alternator and voltage regulator and give one failure symptom for each

Draw a simple lighting circuit with a battery, fuse, switch and bulb, and explain why a fuse rating must match the circuit

Use a multimeter to describe how you would test for continuity, measure battery voltage and check a charging voltage of about 13.8 to 14.4 V

Explain the difference between series and parallel circuits and why vehicle lamps are wired in parallel

List the correct sequence for an engine tune-up covering spark plug gap, ignition timing, idle speed and air filter

Describe how to diagnose a vehicle that cranks but does not start, listing at least five checks in a logical order

Explain the environmental harm of used engine oil, coolant and batteries and state the correct disposal route for each

Describe the four-gas exhaust analyser readings (CO, HC, CO2, O2) and what a high HC reading suggests

State five personal protective equipment items used in a workshop and one task that requires each

Explain why a mechanic must record and report a safety defect found on a customer vehicle even if it is not part of the job

Explain how a steering rack converts rotary steering-wheel motion into linear movement of the track rods

Describe the construction of a leaf spring and a coil spring and state which is better suited to a light commercial vehicle and why

Explain the purpose of a shock absorber and describe what happens to a vehicle with worn shock absorbers

Describe the handbrake and parking brake mechanism and explain why it must not be relied on for emergency stopping

Explain the function of the horn, wiper motor and indicator flasher unit and state one common fault for each

Outline how you would check tyre tread depth and explain the legal minimum and why bald tyres are dangerous

Revise all nine domains by answering 60 mixed practice questions and logging every wrong answer with the correct fact

Re-draw from memory the engine diagram, driveline sketch, fuel-flow diagram and lighting circuit without referring to earlier notes

Explain aloud, in under three minutes each, ten core concepts such as valve overlap, clutch slip, brake bleeding and fuse rating

Review your error log and re-test the three weakest domains until you score at least 80 percent on each