Brakes
What is the primary function of brake pads?
To use as a friction device to stop the vehicle.
What is the purpose of a battery in a vehicle?
The first purpose of an auto battery is to provide power for starting your vehicle. It also acts as a surge protector for the car's computer and provides power for short-term use of things like lights, stereo, GPS or wipers when the engine is off. The car battery is part of the starting system.
Why is it important to wear safety goggles when working on vehicles?
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What tool is used to measure torque?
Torque Wrench
What is the recommended frequency for oil changes in most vehicles?
For most modern vehicles, the recommended frequency for oil changes is between 5,000 and 7,500 miles; however, it's crucial to always consult your vehicle's owner's manual for the manufacturer's specific recommendations as this can vary depending on the car and type of oil used.
Name two types of brake systems commonly used in vehicles.
Disc and Drum
Identify two components found in a vehicle's electrical system.
Two components found in a vehicle's electrical system are the battery and the alternator; the battery stores electrical power and the alternator generates electricity to recharge the battery while the engine is running
Name two safety precautions to take when lifting a vehicle.
When lifting a vehicle, two crucial safety precautions are: always ensure the lift is within its rated capacity and never raise a vehicle with someone inside it; only trained personnel should operate the lift and position the vehicle on the correct lifting points.
Name one hand tool used for tightening nuts and bolts.
A wrench is a hand tool used to tighten and loosen nuts and bolts:
Wrenches are available in many shapes and sizes, and are often named for their purpose. Some types of wrenches include:
General-use wrenches: Used for nuts and bolts with flat, parallel surfaces, like square or hexagonal
Pipe wrenches: Used for gripping round objects in plumbing
Socket wrenches: Used when the nut or bolt head is recessed below the surface
Crowfoot wrenches: Designed for accessing fasteners in tight spaces, and can be attached to a ratchet, extension bar, or torque wrench
Torque wrenches: Used to measure the amount of force required to turn a nut or bolt
Name one sign that a vehicle may need new tires.
A clear sign that a vehicle may need new tires is when the tread on the tires is worn down to the point where the tread wear indicator bars are visible, which are small raised bars that appear when the tread is nearing the end of its life
What is the purpose of a brake booster?
To multiply the Drivers foot pressure
What does a multimeter measure?
A typical multimeter can measure voltage, resistance, and current, in which case can be used as a voltmeter, ohmmeter, and ammeter. Some feature the measurement of additional properties such as temperature and capacitance.
What is the purpose of fire extinguishers in an automotive shop?
The purpose of fire extinguishers in an automotive shop is to help prevent and fight fires that can be caused by the many flammable materials and high-tech equipment found in these spaces:
Flammable liquids: Grease, oil, gasoline, solvents, lacquers, and alcohols
Electrical equipment: Batteries, wiring, and circuit breakers
Combustible dust: Dust, swarf, and lubricants
What is the purpose of a diagnostic scan tool?
A diagnostic scan tool, often called an OBD (On-Board Diagnostics) scanner, is a device that connects to a vehicle's computer system to read and interpret data from various sensors, allowing mechanics or car owners to identify potential problems with the vehicle by retrieving diagnostic trouble codes (DTCs) and providing information about the issue, essentially helping to diagnose car malfunctions
What is the purpose of a vehicle inspection?
The primary purpose of a vehicle inspection is to ensure that a vehicle is in safe working condition by examining its key components and systems, thereby protecting the driver, passengers, and other road users by identifying potential issues before they become major problems and could cause accidents; essentially, it's a preventative maintenance check to maintain the car's safety and longevity.
Explain how anti-lock braking systems (ABS) work.
Anti-lock braking systems (ABS) use sensors to monitor the speed of each wheel and prevent them from locking up when the brakes are applied:
Describe the difference between AC and DC electrical systems.
Electric current flows in two ways as an alternating current (AC) or direct current (DC). The main difference between AC and DC lies in the direction in which the electrons flow.
Describe the use of Personal Protective Equipment (PPE) in automotive repair.
Personal Protective Equipment (PPE) is used in automotive repair to protect workers from injury and illness caused by hazards in the workplace. Some examples of PPE used in automotive repair include:
Eye protection: Safety glasses, goggles, or face shields to protect the eyes from splashes, sprays, or flying debris
Hearing protection: Ear plugs or ear muffs to protect the ears from loud noises
Protective clothing: Aprons, coveralls, coats, pants, hats, hoods, sleeves, and gloves to protect the body
Chemical protective suits: To protect workers from exposure to chemicals
Helmets: To protect workers during welding jobs
Industrial absorbent mats: To prevent slips
Describe how to properly use a torque wrench.
To properly use a torque wrench, first, set the desired torque value on the wrench by aligning the indicator with the correct setting on the handle; then, attach the appropriate socket to the wrench and apply steady pressure while tightening the bolt until you hear a distinct click, signifying that the desired torque has been reached; finally, remove the socket and move on to the next fastener
Explain how to check the coolant level.
To check your coolant level, open the hood of your car, locate the coolant reservoir (usually a translucent plastic container near the radiator), and visually check the fluid level on the side of the reservoir against the "minimum" and "maximum" markings; ensure the coolant level is between these two points, and if low, add more coolant of the correct type as needed; always ensure the engine is cool before checking the coolant level.
What are the signs of brake fluid contamination?
Explain how a starter motor functions.
The starter motor is responsible for turning the engine over during ignition and allowing everything else to happen. When you turn the ignition on, the starter motor engages and turns the engine over allowing it to suck in air.
What are the risks of working under a vehicle without proper support?
Working under a vehicle without proper support, like jack stands, poses a significant risk of being crushed by the vehicle suddenly falling, potentially leading to serious injury or death due to the heavy weight of the car, especially if the jack slips or fails; other risks include the vehicle rolling off the jack if not properly secured, and potential damage to the vehicle itself if improper lifting points are used
Explain the function of a compression gauge.
A compression gauge is a tool used to measure the pressure inside a confined space, most commonly used in the context of internal combustion engines to assess the health of the cylinders by measuring the pressure built up when the piston compresses the air-fuel mixture, thereby indicating the condition of the piston rings, valves, and cylinder head seals within the engine; a low compression reading usually signifies leaks or worn components within the cylinder
What are the steps to replace a cabin air filter?
To replace a cabin air filter, you can follow these steps: