AM Aircraft Maintenance Engine & System Repairs 2

Question 1

When inspecting a turbine engine for hot section damage, which area is most susceptible to thermal cracking?

Accepted Answer

Turbine nozzle guide vanes

Answer

Turbine nozzle guide vanes are exposed to the highest gas temperatures in the engine and are most susceptible to thermal cracking and erosion.

Question 2

What is the correct method to check for internal cylinder cracking on a reciprocating engine cylinder barrel?

Accepted Answer

Magnetic particle inspection

Answer

Magnetic particle inspection (Magnaflux) is used on ferrous cylinder barrels to detect internal and surface cracks not visible to the naked eye.

Question 3

During engine run-up, oil pressure drops to zero but oil temperature remains normal. The most likely cause is:

Accepted Answer

Faulty oil pressure gauge or sending unit

Answer

A sudden drop to zero with normal temperature and no engine distress usually indicates an instrument or sender failure rather than actual oil starvation.

Question 4

A turbojet engine compressor stall is best identified by which symptom during ground run?

Accepted Answer

Loud banging or popping with RPM fluctuation

Answer

Compressor stall produces a characteristic loud bang or series of pops accompanied by RPM fluctuation and a surge in exhaust gas temperature.

Question 5

What type of safety wire is required for aircraft engine oil drain plugs per FAA regulations?

Accepted Answer

0.020-inch stainless steel wire

Answer

FAA AC 43.13-1B specifies 0.020-inch diameter stainless steel safety wire for most engine hardware including oil drain plugs.

(AM) Aircraft Maintenance Certification Practice Test

(AM) Aircraft Maintenance Certification Practice Test

AM Aircraft Maintenance Engine & System Repairs 2