Non-destructive Testing - Corrigé des questions du texte

1/ What three nondestructive techniques are mentioned in the text?
These are 1/ industrial tomography, 2/ TV fluoroscopy (with microfocus), 3/ Compton-ray radiography.

2/ What various composite structures are inspected by Aerospatiale technicians? What are they for? (§ 1)
The composite structures inspected by Aerospatiale technicians are structures mostly destined for launch into space, namely 1/ ballistic missile motor casings, 2/ nozzle throats, 3/ tanks for satellites, 4/ missile re-entry bodies and 5/ space-probe heat shields.

3/ For what particular purpose is nondestructive testing used? (§ 2)
It is used in the pinpointing and identification of flaws.

4/ What is industrial tomography akin to? (§ 3)
It is akin to the scanners used for medical diagnosis.

5/ How does an industrial scanner work? (§ 3)
It gives an accurate, clear image of a cross-section through an object.

6/ In what domain is industrial tomography particularly useful? (§ 5)
It is particularly useful in the development of complex or costly items or of large parts and for checking them for possible flaws.

7/ How is fluoroscopy improved by the use of a microfocus? (§ 4)
The use of a microfocus compensates for the low geometrical resolution and provides a highly magnified image.

8/ In what particular domain is microfocus fluoroscopy useful? (§ 7)
It finds applications in the quality control of ball-bearings, gears and electrical components.

9/ What sort of equipment is inspected thanks to microfocus fluoroscopy? (§ 6)
Small items (ball-bearings, gears and electrical or electronic components).

10/ What are the strong points and weak points of TV fluoroscopy? (§ 4)
Its strong points are real-time observation and interactivity. Its weak points are a mediocre resolution and too much photophonic noise.

11/ Where does the name Compton-ray radiography come from? (§ 7 and Note)
It comes from the name of a Nobel-prize-winning physicist.