Element 3-3 Materials Flashcards
1
Q
What metal is usually employed as sacrificial anode for corrosion purposes
A
zinc bar (zinc is very reactive so corrosion eats the zinc, can easily be sacrificial
2
Q
What is the relative dielectric constant for air?
A
1
3
Q
Which metal object may be least affected by Galvanic corrosion when submerged in water?
A
stainless steel propeller shaft
4
Q
Skin effect is the phenomenon where
A
rf current flows in a thin layer of the conductor closer to the surface as frequency increases
5
Q
Corrosion resulting from electric current flow between dissimilar metals is called
A
galvanic corrosion
6
Q
Which of these will be most useful for UHF frequencies?
A
Mica
