1. Brakes
   Carburetor
2. Catalytic convertor
   Engine

Ok, this one is a no-brainer. Use your brakes to stop your car.

1. Fuel injector
   Gas line
2. Gas tank
   Gas pump

Fuel injectors squirt gasoline into the engine of a car.

1. Gas pedal
   Clutch
2. Brake pedal
   E-brake

The clutch enables you to switch gears. You may not even notice the clutch if you drive an automatic.

1. Gasoline
   Solenoid
2. Battery
   Exhaust

The battery powers the electrical system. That makes your cool gadgets work.

1. Fuel tank
   Air conditioner
2. Radiator
   Spark plug

Your radiator circulates water through the engine to help keep it from overheating. Never open a radiator when it's hot!

1. Exhaust system
   Fuel system
2. Cooling system
   Stopping system

Your car's exhaust system manages the waste products of combustion. These waste products are funneled out of the vehicle.

1. One
   Two
2. Three
   Four

Brakes are located on all four wheels. They are often operated by a hydraulic system.

1. Gas pump
   Heat shield
2. Engine
   Muffler

Your car's muffler muffles most of the noise. Your car stereo is a separate issue.

1. Fuel plug
   Spark plug
2. Engine plug
   Gas plug

Spark plugs makes sparks that ignite fuel to make energy in the engine.

1. Line
   Compressor
2. Squirter
   On/off switch

The compressor circulates coolant throughout the air conditioning system. That's a basic and important function.

1. Clutch
   Brake
2. Axle
   Shock absorbers

Shock absorbers do what they say... they absorb the shock caused by bumps and chuckholes.

1. Exhaust
   Fuel
2. Suspension
   Brake

Calipers are part of the brake system. Calipers straddle the disc.

1. Water
   Oil
2. Antifreeze
   Vaseline

Oil is used to lubricate engine parts. Running with no oil can permanently damage an engine.

1. Transmission
   Gasoline
2. Axle
   Tires

The transmission receives energy and disburses it to the wheels via other parts. The transmission is part of the powertrain.

1. Muffler
   Catalytic converter
2. Tail pipe
   Engine

The catalytic converter helps reduce harmful vehicle emissions. In many states, vehicles without a converter are not street legal.

1. Battery connector
   Alternator
2. Convertor
   Engine

The alternator helps charge your car's battery. The alternator works while your car is running.

1. Internal combustion
   Internal running
2. External combustion
   Extraneous combustion

Automobiles operate on internal combustion engines. Combustion means fire.

1. In-line
   V-8
2. Horizontally-opposed
   Vertically positioned

Common engine layouts include in-line, V-8, and horozontally-opposed. Four-cylinder engines are often in-line, or straight.

1. Six
   Eight
2. Twelve
   Thirteen

Cars with engines of greater than 2,000cc typically have six cylinders. They are arranged in line, or straight.

1. 12 cylinder engine
   5 cylinder engine
2. 4 cylinder engine
   1 cylinder engine

A 12-cylinder engine would use a v-shaped arrangement. Some six-cylinder engines may also use a v-shaped arrangement.

1. Gas tank
   Engine
2. Carburetor
   Spark plug

Gas is mixed with air inside the carburetor. This is where combustion begins.

1. 1, 2, 4, 3
   1,2,3,4
2. 4,3,2,1
   0,1,4,7

Engine valves do not fire in order. Ordered firing causes too much vibration.

1. Spark plug
   Piston
2. Cam shaft
   Fuel pump

A fuel pump pulls fuel out of the tank and into the carburetor. The fuel mixes with air in the carburetor.

1. Bead
   Bobber
2. Float
   Tube

The float tells your car how much gas is in the tank. The float, as the name implies, floats within the tank.

1. Steering system
   Suspension system
2. Exhaust system
   Timing system

Your car's steering system helps you make turns. It makes turning the wheels far easier than if you had to do it manually.

1. Gas pedal
   Ignition key
2. E-brake
   Transmission

You use your ignition key to activate your car's starter. This tells your car to feed power to the starting system.

1. Closed circuit
   Open circuit
2. Leading circuit
   Available circuit

Your car's electrical system is a closed-circuit system. Very little power is needed to make it work.

1. Fuse box
   Alternator
2. Distributor
   Float

A float is not part of a car's electrical system. It is part of the fuel system.

1. Leaf
   Coil
2. Water
   Steel

Automobiles have leaf springs and coil springs. They are typically made of steel.

1. Shock absorbers
   Tires
2. U-joint
   U-bolt

Shock absorbers keep a car's springs from bouncing all the time. Shock absorbers are sometimes called dampers.

1. Disc brakes
   Drum brakes
2. Hard brakes
   Emergency brakes

Disc brakes are considered more efficient than drum brakes. That's why most front brakes are disc brakes.

1. Electricity
   Fluid
2. Energy
   Power

Fluid causes pressure to build up in the brake system to help activate the brakes. Always check your brake fluid to ensure your brakes work properly.

1. Disc
   Drum
2. Open
   Closed

Disc brakes use pads. The pads are pushed against the disc to stop the car.

1. Disc
   Drum
2. Open
   Closed

Drum brakes use shoes. Drum brakes may overheat if applied too often in a short period of time.

1. Petroleum-based fuels are the most powerful
   Petroleum-based fuels are cheapest
2. Petroleum-based fuels will last forever
   Petroleum-based fuels are the safest

We use petroleum-based fuels to operate cars because they provide more energy. More energy means faster cars.