PPL PPL Aircraft Systems and Powerplant

Question 1

What type of fuel is used in most piston-engine training aircraft?

Accepted Answer

100LL Avgas

Answer

Jet-A

Answer

Mogas

Answer

100 Avgas

Question 2

What does the carburetor heat control do in a piston aircraft?

Accepted Answer

Routes warm air through the carburetor to prevent or melt ice

Answer

Heats the fuel before combustion

Answer

Increases engine power during climb

Answer

Cools the engine during descent

Question 3

What is the primary purpose of the magneto system in a piston engine?

Accepted Answer

To provide an independent ignition source not relying on the aircraft battery

Answer

To power the aircraft's avionics

Answer

To regulate fuel flow to the carburetor

Answer

To cool the engine cylinders

Question 4

In a fuel-injected engine, what replaces the carburetor?

Accepted Answer

A fuel control unit and injectors delivering fuel directly to each cylinder

Answer

A turbocharger

Answer

A primer system

Answer

A throttle body and venturi

Question 5

What does normal oil pressure indicate in a piston aircraft engine?

Accepted Answer

Oil is circulating through the engine to lubricate and cool internal parts

Answer

Engine temperature is within limits

Answer

Fuel pressure is adequate

Answer

Manifold pressure is correct

Question 6

What is the function of the primer in a piston aircraft?

Accepted Answer

To inject fuel directly into the cylinders to aid cold engine starting

Answer

To enrich the fuel mixture during cruise

Answer

To lubricate the engine before startup

Answer

To pressurize the fuel system