Chapter 1 test w/ Maish

The cam shaft is turned by the ________ through means of ____, ____, or _____

Crankshaft. Belt, chain, or gear

What is the foundation for all the engine parts?

Engine block

List the exhaust stroke of the engine in sequence and explain what happens

Exhaust stroke 1. Exhaust opens, intakes closes 2. Piston moves up 3. Burned a/f mixture exit 4. Crank turns 720 degrees or 2 turns

Define engine

Group of parts assembled a certain way that its designed to convert fuel to a useful form

What does the octane number tell you

How well the fuel will resist detonation

Gasoline is made up of two elements, ______ & _____

Hydrogen and carbon

List three pollutants developed by the engine give, the name and symbol

Hydrogen carbon =HC Carbon monoxide = CO Oxides of nitrogen = Nox

List the intake stroke of engine in sequence and explain what happens

Intake stroke 1. Intake valve opens, exhaust valve closes 2.piston mines down 3. A/f mixture ignites 4. Crank turns 180 degrees or 1/2 a rev

The distance between TDC and BDC is called a _______

Stroke

What will effect how hot the air/fuel mixture becomes before ignition

The compression ratio

What causes cylinder to move down the cylinder as the a/f mixture is ignited

The force of the expanding gases

What is stoichiometric?

The perfect mixture of fuel to air (14.7 : 1)

Write 2 ways to describe a rich mixture

Too much fuel, correct air Not enough air, correct fuel

What are two way to describe a rich mixture?

Too much too much fuel , correct air Not enough air, correct fuel

What does TDC stand for and what does TDC mean

Top dead center. It's the highest point the piston can travel in the cylinder

An absence of low air is called a ______

Vacuum or low pressure area

What is energy?

the ability to do work

On the intake stroke, air is pushed in the cylinder by _________

Atmospheric pressure

Breaking gasoline into smaller particles is called

Atomization

What is the diameter of a cylinder called

Bore

What part of the cam shaft comes in contact with the valve lifter and pushes it open

Cam lobe

What part on the camshaft come in contact with the valve lifter and pushes it open

Cam lobe

What is the area where the A/F is burned called?

Combustion chamber

Define Compression ratio

Comparison of volume of a cylinder when piston is at BDC to when it's at TDC

How tightly the a/f mixture is compressed is called the _______

Compression ratio

What is the seal between piston and cylinder wall

Compression ring

Define energy

Ability to do work

Define vacuum

An absence of air (low pressure air)

Air is pushed into the cylinder on intake stroke by _____ & ____?

Atmospheric pressure

Label all seven part of the micrometer

1. Anvil 2.spindle 3. Sleeve 4. Thimble 5. Ratchet 6. Lock 7. Frame

List three jobs of the flywheel

1. Foundation of starter ring gear 2. Help with piston move through non-power strokes 3. Foundation for clutch or torque converter 4. Smooth out engine power impulse

Briefly explain how fuel and air enters the cylinder use the following words in your explanation. Vacuum, low-pressure area, and atmospheric pressure

1. Piston move down with valve close a vacuum 2. The intake valve open, and atmospheric pressure rushes in to fill the low pressure area

How many total strokes will occur in one minute for all cylinder in a four cylinder engine that is running at 2000 RPM

16,000 strokes

What is the ratio of turns of the camshaft to the crank shaft

1:2

If a crank shaft travel five revolution how many revolutions does the cam travel

2.5

How many power stroke will occur in one cylinder in one minute in engine running at 1200 RPM

600 power stroke

Define volatility

A liquids ability to evaporate quickly

What two things does the shape of the cam lobe determine

Lift and duration

What two things help carry the piston through the strokes that don't have power

Other piston and fly wheels

Gasoline needs _____ in order to burn

Oxygen

List four features of good gasoline

Pass exhaust test, burn cleanly, ignites readily, resist freezing or boiling, prevents detonation

What does stoichiometric mean

Perfect ratio of air to fuel (14.7 : 1)

List the power stroke of the engine in sequence and explain what happens in the stroke

Power stroke 1. Both valve closed 2. Piston moves down 3. A/f mixture ignites 4. Crank turns 540 degrees or turns 1 & 1/2 rev

What does the piston do?

Receives power from the burning gassed slides up and down in the cylinder

What is vapor lock

When liquid gas gets too hot in the fuel lines and evaporates so it can't be pumped to the engine