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Questions and Answers
What is the primary function of the crankshaft in an engine?
What is the primary function of the crankshaft in an engine?
- To house the spark plugs
- To operate the valves
- To generate power for the transmission
- To convert up-and-down motion into rotary motion (correct)
What is the purpose of the transmission control module (TCM) in an automatic transmission?
What is the purpose of the transmission control module (TCM) in an automatic transmission?
- To control the gear shifts (correct)
- To monitor the oxygen sensor
- To control the air/fuel mixture
- To engage the parking brake
What is the function of the oxygen sensor in an Electronic Fuel Injection (EFI) system?
What is the function of the oxygen sensor in an Electronic Fuel Injection (EFI) system?
- To monitor the fuel pressure
- To control the fuel injectors
- To monitor the exhaust gases (correct)
- To regulate the ignition timing
What is a common problem associated with brake systems?
What is a common problem associated with brake systems?
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What is a component of the suspension system?
What is a component of the suspension system?
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What is a type of brake system?
What is a type of brake system?
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Study Notes
Engine Repair
- Engine Components:
- Cylinders: where combustion takes place
- Pistons: move up and down in cylinders, driven by explosive force
- Crankshaft: converts up-and-down motion into rotary motion
- Camshaft: operates valves, allowing air and fuel into cylinders
- Common Engine Problems:
- Oil leaks
- Overheating
- Low compression
- Faulty spark plugs
- Repair Techniques:
- Compression testing
- Leak-down testing
- Cylinder head reconditioning
- Engine block machining
Transmission Systems
- Manual Transmission:
- Uses gears and clutch to transfer power
- Driver controls gear shifts
- Automatic Transmission:
- Uses torque converter and planetary gearsets
- Transmission control module (TCM) controls shifts
- Transmission Components:
- Gears
- Bearings
- Seals
- Clutch packs
- Common Transmission Problems:
- Slipping or hesitation
- Leaks
- Noise or vibration
- Failure to engage gears
Electronic Fuel Injection
- EFI Components:
- Fuel injectors
- Fuel pump
- Oxygen sensor
- Engine control module (ECM)
- How EFI Works:
- ECM calculates air/fuel mixture
- Fuel injectors spray fuel into intake manifold
- Oxygen sensor monitors exhaust gases
- Benefits of EFI:
- Improved fuel efficiency
- Increased power
- Reduced emissions
- Self-diagnostic capabilities
Brake Systems
- Brake Components:
- Brake pads
- Rotors
- Calipers
- Brake fluid
- Brake Types:
- Disc brakes
- Drum brakes
- ABS (anti-lock braking system)
- Brake Problems:
- Worn or warped rotors
- Spongy brake pedal
- Brake noise or vibration
- Leaks or low brake fluid
Suspension And Steering
- Suspension Components:
- Springs
- Shock absorbers
- Struts
- Control arms
- Steering Components:
- Steering gear
- Steering column
- Power steering pump
- Steering linkage
- Suspension and Steering Problems:
- Worn or loose components
- Noise or vibration
- Uneven tire wear
- Steering wander or pull
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