Automotive Exam Study Guide Questions and Answers 100% Pass

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Automotive Exam Study Guide Questions and Answers 100% Pass A fire involving gasoline is what class of fire? B class fire. Your workplace would will be a much safer place if you: Know what to do ... in an emergency. Exhaust gases in workshops are a serious health hazard. The best way to get rid of these gases is: With an exhaust extraction system. Why should you disconnect the battery prior to cleaning a vehicle with solvents? Because some solvents are highly volatile and can explode. Material Safety Data Sheets provide information about: The handling, use and storage of chemicals. In the case of a building fire, the procedure will involve leaving the building and: Assembling at a meeting point. Before you begin a vehicle service, you notice a scratch in the fender paintwork. What should you do about it? Make a note of the damage on the job sheet, and bring it to the attention of your supervisor or the customer. If an object is embedded in the eye, you should: Not attempt to remove it. The features of a 'caution' sign are: Yellow background, black text. Workplace safety requires: An awareness of the risks A plan to address the risks An ongoing commitment to safety If a standard screwdriver is the correct size it will: Neatly fit the slot with the blade across the whole width A soft-faced hammer must be used when? Damage to the work must be prevented. Why is one end of a chisel softer than the other? It won't chip when hit with a hammer. What is the most common type of pliers? Combination pliers. Why is the handle of a box wrench bent'? To provide full hand grip with work clearance. A ratchet handle is not recommended for tightening bolts to a high torque value because? The ratchet mechanism could be damaged. A socket extension universal joint may be used when? The turning force must be applied at an angle. What tool is used to repair internal threads? Tap. If you were to open your hood from the front and look into the engine compartment to your right, that would be the __________ side of the engine compartment in orientation to the car. ... SUV stands for: Sport utility vehicle. You have a 2005 Chevrolet Cobalt. Cobalt is: Model. Where is the VIN number usually located? On the left front corner of the windshield. The VIN number assists in: Identifying the make, model and year of vehicle Identifying specific vehicle characteristics Locating specific TSB's/Recalls for that particular vehicle Why are fluid specifications important? Identify proper filling capacities. High viscosity liquid is __________ and flows slowly. Thick. Over time, engine oil brakes down by _____________ with dissolved atmospheric oxygen. Reacting. Oil is stored in the _________ bolted to the bottom of the engine block OIl pan sump. The Lubrication system distributes oil throughout the: Engine. Oil Pumps are usually driven by the? The camshaft or the crankshaft Which is the most common oil filtering system employed on automotive vehicles? Full-flow. Free electrons are necessary for electric current, but for those electrons to move, they need a complete: Pathway and circuit. Ohms law states: Current (Amps)=Volts/Resistance(Ohms). Static electricity can be induced by rubbing 2 ________together: Insulators. The term alternating current is often shortened to: AC. When two different metals are immersed in an electrolyte, one loses electrons and becomes: Positive. A current can be induced by moving a conductor in a fixed __________ field: Magnetic. Technician A says that a circuit has 3 Ohms of resistance. As the system operates at 12 volts the amperage must be 4 amps. Technician B says that a circuit has 3 Ohms of resistance. As the system operates at 24 volts the amperage must be 12 amps. Who is correct? Technician A. "Work" is the measure of: Released energy. A material that allows electrical current to flow easily is called: An insulator. The purpose of an insulator is to: Prevent current loss. A material that allows electrical current to flow easily is called: A conductor. The potentially explosive gas given off when charging a battery is: Hydrogen. The electrolyte in an automotive lead acid battery is: Dilute sulfuric acid. An alternator converts: Mechanical energy into electrical energy. The main part(s) of a charging system is/are: Battery Alternator Voltage regulator The alternator is not part of: The starting system. The starting motor converts electrical energy into: Mechanical energy. Most wheels have holes or slots in the wheel flange for what purpose? Allow air flow to the brakes. The width of a wheel rim is the distance across the rim ________ at the bead seat. Flanges Technician A says tubeless tires are bonded to the wheel with special glue. Technician B says tubeless tires create a leak proof seal where the tire bead seals against the wheel's flange. Who is correct? Neither Tech A nor Tech B is correct. Technician A says that tires that have a DOT rating, have been passed a governmental standard of quality. Technician B says that all DOT rated tires will have a speed rating of 118 mph. Who is correct? Technician A. The main function of grooves in the tread is to: Clear water from the contact patch. Tubeless tires have no inner tubes because they have: A soft-rubber inner-casing liner. The main function of grooves in the tread is to: Clear water from the contact patch. Toe angles ensure that the wheels are in line with the: Direction of travel. The imaginary center line that passes through the steering pivot line is called the steering: Axis. A "rack-and-pinion" steering system is used on: Light passenger vehicle. The inner and outer tie rod ends are connected by the: Adjusting sleeve. What are the two main types of steering systems currently used? Recirculating ball and rack-and-pinion. Inner tie rod ends are connected by the: Center link. Identify a vehicle part that is not sprung weight: Axle. Identify the force that must be controlled to maintain wheel unit location: Cornering Force. An axle that carries vehicle drive power is referred to as: Live axle. What is a function of the suspension system? Keep the wheels on the road. Rear wheel independent suspension has to allow for which mechanical system? Drive axles. Conical and barrel shaped springs will allow for which spring ability? Longer spring travel. Why are different coil springs color coded? Different load rate. What forms a multi-leaf spring? Several single leafs. Which of the following best describes a flat object, typically made ceramic? Brake pads. Which of the following moves brake fluid from the brake booster to each of the four brakes? Brake line. Friction measured in pairs of surfaces is called: Coefficient. Select the condition that automotive brakes are used for: Motion. If a master cylinder is applying force to a small and a large cylinder, the force exerted on the smaller cylinder will be _________ than the force applied to the larger cylinder. Greater. Since liquid is effectively ____________, pressure applied to a liquid is transmitted without loss throughout the liquid. Incompressible. All passenger vehicles must have at least: Two independent braking systems. What are the purposes of Antilock Brake Systems?: Allows driver to maintain steering control Shortens stopping distance The ___________ cylinder provides hydraulic pressure. Master. The piston applies _____________ pressure to the fluid in the cylinder. Hydraulic. Combustion of the air-fuel mixture in the cylinders generates: Heat. What will occur If an engine is not effectively cooled? the moving parts will seize up. A mechanical heat sensitive valve that controls coolant flow is referred to as? thermostat. Radiator fans do not: Push air through the radiator when the temperature reaches a predetermined level. One way to prevent coolant boiling is to use a: Pressure cap As pressure increases, the boiling point: Increases What are the five key events of an internal combustion engine? Intake, Compression, Ignition, Power & Exhaust In one 4-stroke cycle, how many strokes produce energy to turn the crankshaft? One. What opens and closes the inlet and exhaust ports in a 2-stroke gasoline engine? The piston In one revolution of the crankshaft how many power strokes does the two-stroke engine produce? One Three components of an engine block are: Cylinder, Piston and Crankshaft For what reason are some cylinder heads made of aluminum alloy? To save weight. What links the crankshaft to the piston? Connecting rod. What is the lower piston ring on a 4-stroke engine called? Oil control ring What are the five key events of an internal combustion engine? Intake, Compression, Ignition, Power & Exhaust. In one 4-stroke cycle, how many strokes produce energy to turn the crankshaft? One. The purpose of the connecting rod is to: join the reciprocating components to the rotary motion components. The connecting rod joins the piston to the crankshaft by a piston pin or a: gudgeon(piston, wrist) pin. What two parts does a head gasket provide a seal between? the cylinder head and the engine block. What is the primary reason for fitting a gasket between two surfaces? form a seal between two mating parts. Where are inlet and exhaust valves generally located? cylinder head Why are intake valves usually larger than exhaust valves? Air-fuel mixture is under lower pressure than exhaust gases. Which component operates between the valve and the camshaft in an overhead cam engine? Rocker arm. What is an overhead camshaft is driven by? Timing chain or belt. Are fuses rated in ohms or volts? Neither. What device uses a small amount of current to control a large amount of current? Relay. What is the property of electricity that can be described as "electrical pressure"? Voltage. Movement of electrons through a conductor is called Current When the engine is not running, current to operate electrical circuits is supplied by the? Battery. What does the alternator convert? Mechanical energy to electrical energy. How many phases does a typical automotive alternator have? Three. What does the rotating magnet in a very simple alternator induce in the stator windings? An alternating current flow. The power consumed by headlight bulbs is normally measured in: Watts. Bulb filaments are normally made from: Tungsten. What is not a part of the reverse light circuit? The Ignition switch. How are the stop lamps connected in relation to each other? In parallel. Driving lights should be wired so that they operate when a high beam is operating. Why is this? To ensure that driving lights turn on when the headlights are dipped from high to low beam. Fog lights are aimed to strike the road a short distance in front of the vehicle. Why is this? This reduces the light reflected into the driver's eyes, providing better visibility Why are vehicles fitted with lighting systems in parallel to each other? Because if one system fails the others can still work independently of the failed system. Wiring diagrams give information about: Electrical circuits and their components. If a master cylinder is applying force to a small and a large cylinder, the force exerted on the smaller cylinder will be _________ than the force applied to the larger cylinder. Greater. Since liquid is effectively ____________, pressure applied to a liquid is transmitted without loss throughout the liquid. Incompressible. The brake pedal is used to transfer the effort from the driver's foot to the master cylinder. This effort is increased by the use of: Mechanical advantage. Hydraulic brake fluid containers must not be left open to the atmosphere as the fluid will: Become contaminated. A dual or divided brake system is safer in the event of a partial failure. This is achieved by a: Tandem master cylinder. Front-engine/front-wheel-drive vehicles normally use a braking system that is: Split diagonally. In a hydraulic brake booster, what component generates system pressure? Power steering pump. The vacuum brake power booster on a gasoline-powered passenger car normally gets assistance from the: Engine intake manifold A drum brake creates friction, which creates heat, which transfers __________ ______________, which slows you down. Kinetic energy A _______ _______ is a component of the drum break system that is not associated with the actuator, return spring and brake shoe. Brake pad. What happens to drum brakes when they get hot? They lose pressure. Longer stoping distances. Smell Linings can be riveted, or more often ___________ to the brake shoe? Adhered. One reason that disc brake rotors are drilled or slotted is? Improved cooling. The disc brake hydraulic system creates which kind of force on the brake rotor? Clamping. The disc brake pad is pressed against which part of the system to create stopping force? The rotor. Glass on ice would be expected to have a ___________ coefficient of friction. Low. The way parking brakes operate can be described as? mechanically operated On vehicles with four disc brakes, how is the parking brake usually applied? At the rear caliper and applied by cable. What is the purpose of the power steering pressure relief valve? To prevent excessive pressures developing when the steering is on full-lock. Power steering assistance is provided by: Hydraulic and/or electrical methods. The upper end of the idler arm is bolted to what? The vehicle frame. The steering system center link is supported by which of the following? Idler arm and Pitman arm. Shock absorbers convert the energy they absorb into what? Heat. What is the most widely used hydraulic shock absorber? Direct-acting telescopic type. As a plunger is pushed in, the air inside a cylinder is forced into a smaller volume. What is the effect on the pressure inside the cylinder? An increase in pressure. When a piston is forced down the cylinder during the power stroke, it applies the force to which part? Connecting rod. The first part of a DTC code is a letter that identifies the location of the fault. What does the letter U indicate? Communication system Technician A says that the main purpose of OBD computer controls is to improve performance. Technician B says that one purpose of OBD is to control emissions. Who is correct? Technician B. What is a known advantage of an electric fuel pump? Fills the fuel system before cranking of the engine. If the inertia sensor is triggered, it shuts off the power supply to: The fuel pump In short/long arm suspension, the lower control arm pivots on bushes that twist on which part? Lower control arm pin. In strut suspension, how is the control arm fixed in place? It is fixed in place with bushe [Show More]

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