20.
21.
22.
23.
a.
Internal pressure.
b.
Impact.
c.
24.
c
25.
e
26.
incomplete closure of a seal...puncture...hermetic seal. (para 2-18a)
27.
28.
b
29.
Minor defect
(1)
Chip.
(2)
Stone in glass.
(3)
Pitted area.
(4)
Sagging surface.
Major defect
(1)
Thin spot.
(2)
Check.
(3)
Pitted rust.
(4)
Bead.
(5)
Blister.
Critical defect
(1)
Birdswing
(2)
30.
d
End of Lesson 2
MD0708
2-30