ACS Powerplant Systems & Engine Overhaul

Question 1

What is the main purpose of the carburetor in an aircraft engine?

Accepted Answer

Mix air and fuel

Answer

The carburetor mixes air and fuel in the correct ratio for combustion.

Question 2

What component cools the cylinders of an air-cooled engine?

Accepted Answer

Cooling fins

Answer

Cooling fins attached to the cylinders dissipate heat.

Question 3

What type of oil system is most common in aircraft engines?

Accepted Answer

Dry sump

Answer

Aircraft engines typically use a dry sump oil system to maintain consistent lubrication.

Question 4

During an overhaul, how are engine cylinders typically cleaned?

Accepted Answer

Bead blasting

Answer

Cylinders are usually cleaned by bead blasting to remove carbon and debris.

Question 5

Which tool measures cylinder wear in an engine?

Accepted Answer

Cylinder bore gauge

Answer

A cylinder bore gauge measures wear inside the engine cylinders.

(ACS) Airman Certification Standard Certified Mechanic Practice Test