Vectronics VEC-1500K - Manual (Page 45)

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Lesson 2 Kinds of Flux
1. Flux prepares solderable metals by removing _______________ from the
surface.
2. When a solderable surface is prepared with flux, it becomes chemically
(active/passive) _______________.
3. When solder pulls away from a surface, it (adheres/retracts)
__________________.
4. When solder "wets" a surface, the process is called (A.) retraction, (B.)
adhesion, (C.) cleaning, (D.) cohesion. [ ]
5. This highly popular flux contains abietic acid, is aggressive, and leaves a
self-encapsulating residue behind. (A.) RMA, (B.) No-clean, (C.) RA,
(D.) Water-soluble. [ ]
6. This aggressive organic flux may contain citric, glutamic, or lactic acid. Its
residue is corrosive and should be removed immediately after soldering.
(A.) RMA, (B.) No-clean, (C.) RA, (D.) Water-soluble. [ ]
7. This moderately aggressive flux contains 2-5% solids, and is especially
useful for hand-soldering "new construction" where parts and circuit boards
are clean.
(A.) RMA, (B.) No-clean, (C.) RA, (D.) Water-soluble. [ ]
8. This organic flux works well for assembly of new products under controlled
conditions, but may not be aggressive enough for general bench work and
repairs. (A.) RMA, (B.) No-clean, (C.) RA, (D.) Water-soluble. [ ]
9. Older-style CFC organic solvents may not make be the best choice for
removing flux residue because they are too (A.) expensive, (B.) toxic,
(C.) harmful to the environment, (D.) all of the above. [ ]
10. (T/F) If you don't have an approved flux remover handy, it's okay to use
Acetone in a pinch. [ ]