Carburetor and Fuel Injection Concepts

The video explains the process of fuel vaporization and mixing with air, which is essential for engine combustion. It covers the workings of carburetors, including the Venturi effect and throttle valve, and discusses carburetor icing and its prevention using carburetor heat. The video also describes the fuel injection system, highlighting its resistance to internal icing. Finally, it addresses impact icing and the use of alternate air supplies to counteract it.

What is the primary function of a carburetor or fuel injection system in an engine?

• To reduce engine weight

• To mix fuel with air at the correct ratio

• To cool the engine

• To increase engine noise

How does the Venturi effect in a carburetor assist in fuel vaporization?

• By heating the fuel

• By compressing the air

• By decreasing air pressure and temperature

• By increasing air pressure

What role does the throttle valve play in a carburetor?

• It increases fuel pressure

• It cools the fuel

• It adjusts the engine's power

• It filters the air

Why is carburetor heat used in aircraft engines?

• To increase engine power

• To prevent carburetor icing

• To cool the engine

• To reduce fuel consumption

Under what conditions is carburetor icing most likely to occur?

• High temperatures and low humidity

• Low temperatures and high humidity

• High temperatures and high humidity

• Low temperatures and low humidity

What is the effect of using carburetor heat on engine performance?

• It doubles the engine power

• It has no effect on performance

• It decreases engine performance

• It increases engine power

How does a fuel injection system differ from a carburetor in terms of icing susceptibility?

• It is not affected by icing at all

• It is equally susceptible to icing

• It is less susceptible to internal icing

• It is more susceptible to icing

What is the function of the fuel flow divider in a fuel injection system?

• To increase fuel pressure

• To mix fuel with air

• To split fuel equally among cylinders

• To cool the fuel

What causes impact icing in aircraft engines?

• Flying through visible moisture

• Low engine speeds

• High engine temperatures

• Flying through dry air

How can impact icing be counteracted in aircraft engines?

• By using a manual or automatic valve for alternate air intake

• By increasing engine speed

• By cooling the engine

• By reducing fuel flow