Carbureted Engines

Question 1

What is the function of a fuel primer?

Answer 1

To add fuel to the engine cylinders prior to engine start

Question 2

What position is the fuel mixture during engine start on a carbureted engine?

Answer 2

Full rich

Question 3

What causes carburetor icing?

Answer 3

The air temperature inside a carbureted engine drops as much as 70 degrees, causing water molecules in the air to freeze on surfaces

Question 4

When does carburetor icing become a problem?

Answer 4

High humidity or visible moisture at temperatures below 70F.

Question 5

What is a sign of carburetor icing in fixed pitch propellor aircraft?

Answer 5

A gradual reduction of RPM

Question 6

How do you eliminate carburetor ice?

Answer 6

Apply carburetor heat

Question 7

If there is no ice, what will the pilot notice?

Answer 7

A slight drop in RPM

Question 8

How will you know that the carburetor heat melted the ice?

Answer 8

The engine will run rough with a slight drop in RPM as the ice melts and water enters the engine cylinders, eventually returning to full RPM