Quiz4

Question 0

What types of NDT can be used on turbine engine inspections?

Answer 0

Magnetic particle, eddy current, dye penetrant, radio graphic.

Question 1

What are the methods of inspection for engine overhaul?

Answer 1

Visual, NDT, measurement,

Question 2

What should be inspected in the inlet duct?

Answer 2

Cracks and erosion. This is a line maintenance function.

Question 3

What is the compressor section inspected for visually? Dye pen? Measurement?

Answer 3

Erosion, cracks, FOD, rub, and galling.

Vanes and blades, mag particle-disks, measurement, chord, creep, twist and bow.

Question 4

What must the combustion section be checked for?

Answer 4

Cracks, warping, scorching, hot spots, shifted burner.

Question 5

Why is the turbine section critical?

Answer 5

High temps!

Question 6

What is primary creep?

Answer 6

Initial, normal growth of a new blade.

Question 7

What is secondary creep?

Answer 7

Slow, normal growth of a blade over time.

Question 8

What is tertiary creep?

Answer 8

Accelerated growth after overtemp.

Question 9

How do you inspect the exhaust section?

Answer 9

The same inspection as the combustion section.

Question 10

How to inspect turbine section?

Answer 10

Visually, for cracks, burns and erosion.
Dyepen, for stress rupture cracks.
Measurement, for creep twist and bow.

Question 11

How may cracks in the combustion section be repaired?

Answer 11

By welding.

Question 12

How may worn combustion liners be restored?

Answer 12

With ceramic or plasma coatings.

Question 13

How is minor FOD in the stator rotor blades repaired?

Answer 13

By blending, must keep original contour.

Question 14

What must be done when there is major damage to a rotor/stator?

Answer 14

The component must be removed.

Question 15

What must be done when there is a major repair to a rotor?

Answer 15

It must be balanced.

Question 16

When must electron beam welding be done?

Answer 16

When non converging compressor stators/rotors are minorly cracked.

Question 17

What does the repair of the inlet depend upon?

Answer 17

The type of compressor inlet material

Question 18

What are different types of compressor inlet materials?

Answer 18

Sheet metal, composite, aluminum or magnesium casting.

Question 19

How is minor erosion in compressor/stator rotor blades removed?

Answer 19

Crocus cloth!

Question 20

How are an odd number of blades replaced?

Answer 20

120 degrees apart for three blades

Question 21

What is the final balance of a reassembled engine called?

Answer 21

Dynamic balance

Question 22

What is the balancing of the compressor and turbine wheels called?

Answer 22

Static balancing

Question 23

What is an important step in engine reassembly?

Answer 23

Carefully follow the engine manufacturers overhaul manual

Question 24

What are the different types of turbine inspections?

Answer 24

Cold section, hot section.

Question 25

What is inspected in a cold section inspection?

Answer 25

Inlet, compressor, diffuser.

Question 26

What are cold inspections usually looking for?

Answer 26

Erosion and FOD

Question 27

What is done when inspecting the cold section?

Answer 27

Each blade and vane of each stage is visually inspected

Question 28

What is the purpose of a hot section inspection?

Answer 28

For the purposes of restoring lost engine performance due to deterioration of the internal engine components

Question 29

What type inspections are hot and cold section inspections part of?

Answer 29

Routine or non routine