Auto tech 1

List four safety rules to follow when using a vehicle lift

- Ask your instructor for a demonstration and get permission before using the lift - position the vehicle's center of gravity on the lift as described in its service manual - raise vehicle slowly while keeping your fingers away from any moving parts on the lift - when the vehicle is high enough to be worked on, make sure the lifts mechanical safety catch is engaged

List 4 important rules for a bench grinder

- always wear eye protection and keep your hands away from the wheel - make sure the grinder shields are in place - keep the tool rest adjusted close to the wheel - do not use a wire wheel to clean soft metal parts, such as aluminum Pistons or brass brushings

Automotive parts and systems can be grouped into 10 categories. Name them.

- body and frame - engine - computer systems - fuel system - electrical system - Cooling and lubrication systems - exhaust and emission control systems - drive train systems - suspension, steering, and break systems - accessory and safety systems

List and explain 4 general tool rules

- purchase quality tools - keep tools organized - keep tools clean - use the right tool for the job

List 5 important rules for a drill press

- remove the key from the chuck before turning on the drill press - secure the part to be drilled with c-clamps or other holding fixtures - use a center punch to indent the part and start the whole - release drilling pressure Right before the bit breaks through the bottom of the part to prevent injury - oil the bit as needed

List 20 general safety rules

- wear eye protection at all times - avoid anyone who does not take shop work seriously - keep your shop organized - dress in an appropriate manner - never carry sharp tools or parts in your pockets - wear full face protection when grinding or welding - work like a professional - use the right tool for the job - keep guards or shields in place - lift with your legs not your back - use adequate lighting - ventilate your work area when needed - never stir up asbestos dirt - jack up a vehicle slowly had safely - drive slowly when in the shop area (mph) - report unsafe conditions to toe supervisor or instructor - stay away from engine fans - respect running engines - do not smoke in or near the auto shop - obtain instructor or service manager permission before using any new or unfamiliar equipment

What is an automotive system?

A group of related parts and assemblies that performs a specific function

Fuel efficiency

A rating of how far a vehicle can travel on only one gallon of fuel

Cylinder

A round hole that is machined in the block. It guides piston movement

Combustion chamber

A small cavity between the top of the piston and the bottom of the cylinder head

The study of the motion of air as it interacts with a moving object is called

Aerodynamics

List four accessory systems

Air conditioner, sound system, power seats, power windows, headlights, rear speakers

A(n) ____ is used when working on a car's steering and suspension systems. It had special equipment for aligning the vehicle's wheels

Alignment rack

A(n) ___ is a set of fitted parts designed to complete a function

Assembly

ASE

Automotive Service Excellence

___ are used to support a vehicle while working under it. A. Floor jacks B. Jack stands C. Transmission jacks D. Bumper jacks

B. Jack stands

When lifting heavy objects, always lift with your ___. A. Arms B. Legs C. Back D. None of the above

B. Legs

A(n) ______ is used to blow dirt off parts and to dry parts after cleaning

Blowgun

A rotary file is frequently used to remove ____. A. Old gasket materials B. Carbon deposits C. Metal burrs and nicks D. None of the above

C. Metal burrs and nicks

Which of the following is not part of the engine? A. Block B. Piston C. Muffler D. Crankshaft

C. Muffler

Which of the following cannot cause electric shock? A. A missing ground prong on cord B. Using an electric drill on a wet floor C. Using electric tools with a ground prong D. None of the above

C. Using electrical tools with a ground prong

Crankshaft

Changes the reciprocating motion of the piston and rod into useful rotary motion

Power tools use ___, ___, or ____ as sources of energy

Compressed air, electricity, or pressurized liquid/hydraulics

Explain the term transaxle

Consists of a transmission and a differential in a single housing

Explain the use of a solvent tank

Contains a pump, reservoir, and solvent, and it is used to remove grease and oil from parts

Chassis

Contains tires, wheels, engine, transmission, and drive axle assembly

Camshaft

Controls the opening of valves

Cylinder head

Covers and seals the cylinder. Also holds the valves, rocker arms, and often, the camshaft

Which of the following is not a commonly used air tool? A. Impact wrench B. Air ratchet C. Air chisel D. Drill press

D. Drill press

A 1/2" drive impact wrench is used for fasteners with head sizes between 1/2" to 1". Which of the following sockets can be used by this particular tool? A. 5/8" chrome plated socket B. 9/16" flat black socket C. 7/16" flat black socket D. None of the above

D. None of the above

A rear axle contains a(n)___ and two ___

Differential; axles

The steering system allows the driver to control vehicle ___ by turning the wheels right or left

Direction

Explain what must be done to prevent physical injuries

Evaluate every repair technique and decide whether a particular operations is safe and take action as required

The ___ system reduces the amount of toxic substances released by the vehicle

Exhaust and emission control system

A one-piece drive shaft rotates the drive wheels on most front-wheel drive cars. True or false

False, transaxle

The suspension system mounts the cars wheels solidly on the frame. True or false?

False; chasis

Coefficient of drag (cd) is a number that represents the ___ force required to move a passenger vehicle through air

Force

The brake system produces ___ to slow or stop the vehicle

Friction

Explain how an engine turns fuel into power to move the car

Fuel burns inside the engine to produce heat. This heat causes hot gas expansion, creating high pressure inside the engine to move its parts to produce power

____ is the most common and dangerous flammable found in an auto shop

Gasoline

Electrical system

Generates and distributes the voltage and current needed to operate the vehicles electrical and electronic components

Flywheel

Helps keep the crankshaft turning smoothly

Accessory and safety systems

Increases occupant comfort, safety, security, and convenience

Valve springs

Keep the valves closed when they do not need to be open

Piston ring

Keep(s) combustion pressure and oil from leaking between the piston and cylinder wall

The cars electrical system consists of the:

Lighting, charging, starting, and ignition systems

Computer systems

Monitor and control electric/electronic circuits to increase vehicle, mechanical and electrical efficiency and dependability

NATEF

National Automotive Technicians Education Foundation

Intake Valves

Open and close to control the flow of air or an air-fuel mixture into

Define air-fuel ratio

Percentage of air to fuel

Drive train systems

Power is transferred from the engine to the drive wheels

Cooling and lubrication systems

Prevent engine damage and wear by regulating engine operating temperature and reducing friction between internal moving parts

Fuel system

Provides a combustible air-fuel mixture to power the engine

Engine

Provides dependable, efficient power to propel the vehicle

Exhaust and emission control systems

Quiets engine noise and reduced toxic substances emitted during fuel evaporation and combustion

Lifters

Ride on the camshaft and transfer motion to the other parts of the valve train

Body

Skin forming the outside of the vehicle

If you are pulling on a wrench as hard as you can and the fastener does not turn, what should you do to prevent Injury?

Stop!

Frame

Strong metal structure that provides a mounting place for all the other parts

Suspension, steering, and brake systems

Supports and controls the vehicle. They control the movement of the body and frame when the vehicle accelerates from a standstill, cruises at highway speeds, or slows to a stop

Block

The metal casting that holds all the other engine parts in place

Rocker arms

Transfer camshaft action to the valves

Piston

Transfers the energy of combustion to the connecting rod

Car batteries can explode. True of False?

True

A Diesel engine does not use spark plugs. True or false?

True.

Most car engines are multi-cylinder engine. True of false?

True. Most common is 2, 3, or 4 cylinder

What's the most common construction design used to build small and medium passenger cars

Unibody construction

What are wheels pullers for?

Used to remove seals, gears, pulleys, steering wheels, axles and other pressured-on parts

Describe the basic operation of a direct gasoline injection system

Uses an engine control module, sensors, and electrically operated fuel injectors to meter fuel directly into the engines combustion chambers

What causes an electrical fire in an automobile?

When a "hot wire" touches the ground

Connecting rod

links the piston to the crankshaft

Body and frame

supports and encloses the vehicle