26 - The Internal Combustion Engine

What is the chemical formula for the combustion of octane in a spark-ignition engine?

• C8H18 + 25O2 → 16CO2 + 18H2O

• C8H18 + 12O2 → 8CO2 + 9H2O

• C8H18 + 2O2 → 8CO2 + 9H2O

• C8H18 + 25O2 → 8CO2 + 18H2O

Tags

NGSS.HS-PS1-7

During which stroke of the four-stroke cycle is the fuel-air mixture ignited?

• Induction stroke

• Compression stroke

• Power stroke

• Exhaust stroke

Tags

NGSS.HS-PS1-5

How is the correct fuel-air mixture introduced into the cylinder during the induction stroke in a carbureted engine?

• By using a fuel injector

• By drawing air through an air filter into the carburetor

• By using a fuel pump

• By using an exhaust system

What is the main advantage of fuel injection over carbureted engines?

• Better cooling

• Better fuel economy and emission control

• Easier maintenance

• Lower cost

Tags

NGSS.HS-PS3-3

In a multipoint injection system, where is the fuel injected?

• Directly into the combustion chamber

• Into the exhaust manifold

• Into each intake port just above the valve

• Into the air filter