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Information for the Mechanic Trainee
State of Michigan - Department of State Lansing
Mechanic study guides 2008

Automobile & Light Truck Repair
Automatic Transmission
Component Diagnosis8%Hydraulic pump, Torque converter, Clutch pack clearance, Pump gear clearance
Internal Operation32%Gear train end-play, Clutch band servo, Planetary gear set, Multiple disc clutch packs, Passing gear operation, Lock-up converters, Vacuum modulator, Valve body shift valves, Shift points, Governor operation, TPS (throttle position sensor), Operation
General Diagnosis18%Harsh engagement, Governor malfunctions, Fluid diagnosis, Glazed band diagnosis, Fluid leak diagnosis, Pressure testing, Spool valve diagnosis, Burned clutch diagnosis, Fluid loss diagnosis
Driveability Diagnosis28%Downshift problems, Improper shifting, Upshifting problems, Modulator problems, Shift linkage adjustment, No drive diagnosis, Creeps in neutral, Restricted filter, Noisy transmission, Slipping Transmission, Sluggish operation
Repair Procedures6%Transmission remove & replace, Stator support bushing wear, Cooler line repair, Pump to converter engagement
Miscellaneous8%Valve identification, Fluid types, Transaxle knowledge, Valve body components, Direct drive condition
Manual Transmission, Front & Rear Drive Axles
Component R & R6%Cluster gear remove & replace, Extension housing seal remove & replace, Synchronizer replacement
Transmission/Transaxle Diagnosis32%Fluid diagnosis, Hard shifting complaints, Transmission v.s. transaxle comparison, Cluster gear end-play, Transaxle gear recognition from picture, Synchronizer problems & operation, 3, 4 & 5 speed diagnosis from picture (4 questions), Overdrive operation, Extension housing bushing wear, Noise diagnosis, Defective output shaft
Final Drive30%Ring gear run-out, Noise diagnosis, Differential diagnosis, Differential pinion nose angle, Ring & pinion gear sets, Ring & pinion backlash, Pinion bearing preload, Final drive ratio, Pinion seal remove & replace, Limited slip diagnosis, Differential bearing preload, Lubricant Types
Axle Shaft\C.V. Repair10%CV boot installation, Drive axle noise diagnosis (2 questions), CV joint operation, Vibration Diagnosis
Clutch Diagnosis & Repair10%Clutch disc operation, Noise diagnosis, Chatter diagnosis, Shifting problem diagnosis
Miscellaneous12%Bearing removal and installation procedures, Drive train noise diagnosis, Gear recognition, Trans interlock function, Understanding how direct drive & gear, reduction is accomplished
Front End, Suspension & Steering Systems
Alignment Diagnosis34%“Toe” adjustment procedures, Caster adjustment procedures for various, suspension systems, Camber understanding, Camber adjusting procedures for various, suspension systems, Total alignment procedures, Caster understanding, Strut suspension alignments
Tire Wear Diagnosis10%Tire wearing angles, Inside tread wear only, Cupping, Feathered outside edge wear, Wear on both inside & outside of tire
Suspension Diagnosis18%Ball joint diagnosis, Measuring curb height, Torsion bar remove & replace, Ball joint remove & replace procedure, MacPherson suspensions, Automatic leveling systems
Steering Diagnosis18%Rack & pinion diagnosis, Power assist diagnosis, Tie rod end diagnosis, Steering gear adjustment, Steering linkage diagnosis, Power steering system bleeding
Driveability Diagnosis16%Pulling diagnosis, Road crown compensation, Wandering or darting diagnosis, Shimmy & bounce diagnosis, Steering wheel centering
Miscellaneous4%Brake rotor R & R precautions, Wheel bearing adjustment
Brakes & Braking Systems
System Diagnosis20%Load sensing proportioning valves, Brake pedal pulsation, Grabbing brakes, Brake lock-up, Dragging brakes, Combination valve, Gear lube in drums, Brake booster
Master Cylinder Diagnosis & Repai9%Low fluid level, Rebuilding, Swollen diaphragm, Sinking pedal
ABS Diagnosis & Repair20%Pump/motor operation, Safety precautions, Speed sensors, Wheel speed readings, 3 way circuits, 4 way circuits, Hose replacement
Drum Brake Diagnosis & Repair22%Drum turning, finish, Single anchor Bendix type, Self adjuster diagnosis, Noise diagnosis, Measuring, Primary and secondary shoes
Disc Brake Diagnosis & Repair16%Rotor thickness variation, Rotor surface fini,sh Caliper overhaul, Brake noise, Brake adjustment, Measuring, lateral run-out
Repair Procedures13%Brake line bleeding, Brake fluid diagnosis, Replacing wheel bearings/races, Brake adjustments
Electrical Systems
OHMS Law & Electrical Symbol Recognition14%Ohmmeter symbol, Splice symbol, Resistor symbol, Switch symbol, Solenoid symbol, Circuit breaker symbol, Variable resistor symbol, Lamp symbol, Diode symbol, LED symbol, Test Methods/Meter & Equipment
Usage11%Ohmmeter usage, Voltmeter usage, Ammeter usage
Starting System Diagnosis20%Capacity/load testing, Starter armature testing, Starter current draw, Starter relay diagnosis, Voltage drop tests, Circuit resistance test, Battery test, Starter drive diagnosis
Charging System Diagnosis5%R & R battery properly, Alternator output testing
Miscellaneous Circuit Diagnosis32%Short to ground, Regulator diagnosis, Blower motor circuit diagnosis, Horn circuit diagnosis, Turn signal circuit, Dimmer switch diagnosis, Tail lamp circuit, Dashlight circuit, Windshield washer pump circuit, Cooling fan circuit, Oil pressure light circuit
General18%Measuring current flow, Voltage drop, Parallel circuit diagnosis, Junction block replacement, E.S.D. (Electrostatic Discharge), S.I.R. (Supplemental Inflatable Restraint), Precautions
Heating & Air Conditioning
Heating & Engine Cooling System Diagnosis22%Leak diagnosis, Low coolant in radiator, Thermostat, Coolant mixture, Low heater output, Windshield fogging, Heater core hose routing, Radiator cap, Defrost operation, Overheating, General Knowledge of A/C Components &
Their Functions16%Receiver drier, Ambient temperature switch, Orifice expansion tube, Compressor muffler, Condensor, Evaporator, Fixed orifice tube, Halide tester
General Knowledge of A/C Systems18%R-12 v.s. R134-a, Refrigerant (understanding change between liquid & gas), Operating pressures, Effect of moisture in the system, Effect of outside temperature & humidity on, System
A/C Diagnosis24%H2O at air ducts, Finding leaks, Overcharged system, Compressor clutch, Gauge set readings, Lack of cold air, Schematic diagnosis
A/C Repair Procedures16%Precautions when discharging system, Compressor o-ring replacement, Correction of excessively high pressure, Compressor replacement, Hose replacement, Charging the system, Leak detection, Condensor replacement
Refrigerant Recovery, Recycling & Handling4%CFC’s (Chlorofluorocarbons) and their affect on the environment, Recycle or replace R-12 and R-134a
Engine Tuneup/Performance
Computer Control & Sensor Basics24%ROM (Read Only Memory), Fault codes, Maintaining stoichiometric balance, Closed loop, Oxygen sensor diagnosis, Knock sensor function, Self diagnosis, Hall sensor pattern reading, Types of meters to use, Scan tool usage, TPS operation
Ignition Systems13%Scope pattern diagnosis, Setting timing, No spark diagnosis, Spark plug voltage requirements
Carburetor & Fuel Injection10%Injector pulse width, Fuel line replacement, E.F.I. principals, “Heavy float” symptoms, Types of injection systems
Performance Basics10%Causes of detonation, Spark plug diagnosis, Dirty air cleaner symptoms, Causes of a lean mixture, Influences on performance
Diagnosis (starting system & misc.)18%Engine timing, Slow cranking diagnosis, Circuit resistance checks, Engine vacuum, Catalytic converter, Cylinder leakage, Compression test
Emission Control Systems25%EGR operation, Evaporative emission control system, Hydrocarbon levels, Oxides of nitrogen, O2 sensor operation, Fuel vapor recovery system, Carbon monoxide levels, Exhaust analyzer readings, Engine timing & effect on emissions, Catalytic converter’s purpose
Unitized Body Structural Repair
Steels (Characteristics & Identification)12%UHSS (Ultra High Strength Steel), HSS (High Strength Steel), Tensile strength, Identification of various steels
Pulling (Straightening)8%Overpulling, How to minimize tearing, Anchoring
Welding20%MIG, Oxyacetylene, Brazing, Shielding gas, Weld quality, Electrode wire use, Precautions, Types of welds, Types of welders
Repairing Structural Components25%A-pillars & B-pillars, Location of welds, Sectioning, Joints to use, Corrosion protection, Weld-through primers, Glass installation
Measuring/Damage Analysis21%Point to point, Indirect damage, Direct damage, Secondary damage, Primary damage, Datum plane, Asymmetrical dimensions, Vehicle centerline, Centering gauges, Loaded measurement
Unitized Body General Understanding14%Crush zones, Design features which initiate the crush, process, Space frame construction, Manufactures’ tolerances, One-time fasteners
Collision-Related Mechanical Repair
Steering Components12%Adjustments, Rack & Pinion, Power Steering
Heating & Cooling10%General Questions
Electrical30%Turn Signals, Horn Circuit, Lights, Starter system
Drive Train28%Bearings, Noise Diagnosis, Transaxle, Transmission Linkage
Brakes10%Brake Lines, Hydraulics, Measuring Techniques
Miscellaneous10%Steering Columns, Fuel Leaks
Motorcycle Repair
Fuel Systems10%Causes of a lean mixture, Carburetor systems; float, power, choke, etc., Spark plug diagnosis, Causes of a rich mixture, Idle mixture adjustment, Diagnosis of a worn needle and seat, Crankcase flooding diagnosis, Carburetor jets, Understanding the idle circuit on a slide type, Carburetor
Skill in Measuring13%Measuring piston ring grooves, Crankshaft end-play, Using plastigage, Using a dial indicator, Spark plug gap, Shaft run-out, Cylinder bore measurements, Understanding decimal equivalents up to 1/1000”, Piston ring end-gap, Reading a micrometer, Understanding metric system measurements
Repair Skills17%Cylinder head bolt torque procedure, Compression test, Repairing float valve wear, Replacing a steel bearing race in aluminum case, Replacing the master link in a drive chain, Valve adjustment, Finishing cylinder walls at overhaul, Fitting pistons to the cylinder, Cylinder leak down test, Valve guide wear, Oil pump installation, Breaker point alignment, Checking for bent forks
Diagnosis17%Poor running with black smoke under heavy throttle, Transmission shifting problems, Backfire, Spark plug fouling and diagnosis, Undershifting or jumping out of gear problem, Coil diagnosis, Hard starting or no start problems, Low oil pressure, Restricted air intake, Rough running and backfiring problems
Ignition & Electrical20%C.D.I. systems compared to point systems, Flywheel stampings, Splicing electrical connections, Continuity testing, Checking voltage in a system, Diagnosing turn signal circuits, Master cylinder operation, Point burning, What tool is necessary to time a flywheel, Timing advance, Alternator output problems, Diagnosing a condenser, Battery charging rates, Zener diode operation
General23%Sticking hydraulic forks, Deglazing cylinders, Understanding the 4-stroke cycle engine, Clutch operation and diagnosis, Full floating piston pins, Oil pressure relief valve operation, Alternator or generator operation, Brake system operation, Adjusting steering stem bearings, Piston slap, Camshaft operation, What is a hydrometer used for, Front drum bakes, Spark plug “reach”, Oil consumption
Recreational Trailer
Electrical Diagnosis36%Trailer tail lamps, Ground wire problems, Turn signal circuits, Determine voltage drop, Trailer stop lamps, Brake controllers, 4-Wire connectors, Current supply for trailer brakes, Electrical symbols, Flasher diagnosis, Color codes, Causes of blown fuses, Current flow/resistance
Brake Diagnosis26%Loss of brakes, Grabby brakes, Dragging brakes, Erratic braking, surging, Pull to one side during braking, Adjusting trailer brakes, Brake shoe recognition
Springs/Hitches16%Leaf springs, Equalizing hitches, Adjustment of hitches, Types of trailer springs, Spring maintenance
General Knowledge12%Surge brakes, Reducing sway, Wheel bearing adjustment, Hydraulic brake lines, Metric measurements, Tire wear diagnosis
Wheels/Hubs10%Wheel bearing diagnosis, Wheel bolt torque pattern



Self-Evaluation for Automobile Mechanics
cpa Lanaudi res-Laurentides 2012

Levels : 80-100% I am ready for the exam, 60-80% I need to have a refresher, 0-60% I need training

YesNoitemModule 1 Powertrain
  1Do you know how to check or adjust the free play of the brake pedal?
  2Do you know how to check a clutch for slipping?
  3Can you name several possible reason for a clutch that slips?
  4Do you know how to centre the clutch disc properly using the appropriate tools?
  5Can you do the routine inspection and maintenance for a differential (ventilation, oil level, bearings, etc)?
  6Do you know how to find specifications using a shop manual (ex.: differential oil viscosity)?
  7Can you explain the basic operation of a differential?
  8Do you know how to adjust the preload of a differential pinion equipped with a collapsable bushing?
  9Do you know how to adjust differential backlash
  10Do you know how to inspect and do maintenance on U-joints?
  11Do you know how to inspect a CV joint when doing a road test?
  12Do you know how to do the routine inspection and maintenance for an automatic transmission?
  13Do you know how to fill and bleed a power steering system?
  14Do you know how to disarm an air bag system when doing work on a steering column?
  15Do you know how to inspect the different suspension ball joints?
  16Can you diagnose a power steering system?
  17Do you know how to check and fill up of fluid on a manual transmission?
  18Can you identify the internal parts of a manual transmission?
  19Do you know how to inspect the bearings on a disassembled manual transmission?
  20Can you name and explain the three drive systems of a vehicle?
YesNoitemModule 2 Brakes
  1Can you explain the purpose of brake fluid and its maintenance?
  2Can you explain the routine maintenance that is done on brake system parts?
  3When the brake shoes are replaced are you able to inspect the other elements of the brake system?
  4Do you know how to adjust the parking brake?
  5Are you able to identify the possible causes for problems with the brake pedal?
  6Do you know how to bleed the master cylinder?
  7Would you be able to disassemble a tandem master cylinder and identify its internal parts?
  8Can you explain the internal operation of a wheel cylinder?
  9Do you know how to disassemble and reassemble a wheel cylinder?
  10Can you identify and explain the operation of a self-adjusting mechanism?
  11Do you know how to measure the runout on a disc?
  12Can you identify the part of the brake caliper that makes it possible for the piston to return to its place after braking?
  13Do you know how to take the measurements of a brake drum and to use the specifications to decide if it is still good?
  14Can you explain the precautions to take when doing maintenance on brakes equipped with an ABS high-pressure system?
  15Do you know how to inspect the wheel speed sensors on a vehicle equipped with ABS brakes?
YesNoitemModule 3 Engines
  1Can you explain the position of the valves and the pistons for each of the four strokes of the engine?
  2Can you do the timing of the camshaft to the crankshaft and position the timing belt or chain?
  3Do you know how to adjust the engine valves following manufacturer specifications?
  4Can you explain in detail how to do a compression check?
  5Can you diagnose the cause or causes of a weak compression??
  6Do you know how to do a leakdown test on a cylinder?
  7Can you diagnose a cylinder head gasket before disassembly (internal leak)?
  8Can you disassemble and measure the parts of a gas-powered four-cylinder engine with an overhead cam?
  9Can you explain how to measure a cylinder for out of round?
  10Can you identify the tools that are needed to measure a cylinder for taper?
  11Do you know how to use a micrometer (metric andstandard)?
  12Are you familiar with the different parts of the crankshaft?
  13Do you know how to measure the crankshaft end play?
  14Do you know how to measure the crankshaft to bearing clearance using a plastic gauge?
  15Do you know how to check the straightness of a cylinder head?
  16Do you know how to measure ring end gap?
  17Do you know how to prepare the cylinder walls when installing new piston rings?
  18Do you know how to inspect the PCV (positive crankcase ventilation) valve?
  19Can you name the different elements of the cooling system?
  20Do you know how to check a radiator cap?
YesNoitemModule 4 Electricity and Fuel Supply Systems
  1Are you familiar with all of the functions of a multimeter (voltmeter, ammeter, ohmmeter, to inspect diodes)?
  2Do you know how to do a load test on a battery?
  3Do you know how to do a discharge test on a battery?
  4Do you know how to test the charging system of a vehicle with a carbon cell?
  5Do you know how to inspect the internal parts of an alternator (ex.: diode, stator) using a multimeter?
  6Do you know how to do a voltage drop test on a charging circuit?
  7Do you know how to check the amount of current needed by the starter?
  8When replacing a starter and solenoid set, can you tell which of the two parts is faulty?
  9Do you know how to check the two solenoid windings on the starter using a multimeter?
  10Do you know how to check the voltage drop on the positive side of the starter circuit?
  11Do you know how to check the condition of the relay using a multimeter?
  12Do you know how to measure the primary and secondary resistance of an ignition coil using a multimeter?
  13Do you know how to check the voltage going from the computer to a fuel injection system sensor?
  14Do you know how to inspect an oxygen (O2) sensor using a multimeter?
  15Do you know how to check the fuel pressure on a vehicle?