Free A&P Powerplant Theory & Maintenance Questions and Answers

Question 1

What is the primary purpose of the compressor section in a turbine engine?

Accepted Answer

To increase air pressure & deliver it to the combustion section.

Answer

To cool the exhaust gases.

Answer

To generate electrical power.

Answer

To filter fuel before injection.

Question 2

Which type of engine uses a propeller to convert shaft power into thrust?

Accepted Answer

Reciprocating engine

Answer

Turbojet engine

Answer

Turbofan engine

Answer

Ramjet engine

Question 3

What is the function of the turbine section in a turbofan engine?

Accepted Answer

To drive the compressor & fan blades using exhaust gases.

Answer

To ignite the fuel-air mixture.

Answer

To convert kinetic energy into electrical power.

Answer

To reduce engine noise.

Question 4

Which condition would likely cause a hung start in a turbine engine?

Accepted Answer

Insufficient airflow or weak ignition.

Answer

Excessive fuel flow during ignition.

Answer

Overheating of the exhaust section.

Answer

High oil pressure.

Question 5

What is the purpose of the oil cooler in an aircraft engine?

Accepted Answer

To regulate oil temperature & prevent overheating.

Answer

To increase fuel efficiency.

Answer

To filter metallic particles from the oil.

Answer

To pressurize the oil system.

Question 6

Which component is responsible for mixing fuel with air in a reciprocating engine?

Accepted Answer

Carburetor or fuel injector.

Answer

Magneto

Answer

Turbocharger

Answer

Oil pump

Question 7

What does a hot section inspection (HSI) focus on in a turbine engine?

Accepted Answer

Inspecting the combustion chamber, turbine blades, & nozzles.

Answer

Checking the propeller blades.

Answer

Testing the oil viscosity.

Answer

Calibrating the fuel gauges.

Question 8

What is the primary cause of detonation in a reciprocating engine?

Accepted Answer

Low octane fuel or excessive cylinder temperatures.

Answer

Insufficient oil pressure.

Answer

Weak spark plugs.

Answer

High humidity.

Question 9

Which tool is used to measure blade tip clearance in a turbine engine?

Accepted Answer

Feeler gauge

Answer

Torque wrench

Answer

Multimeter

Answer

Hydrometer