When the A/C System Is First Turned on a Foul

question 28

Multiple Choice

When the A/C system is first turned on a foul smell comes out of the duct system.Technician A says that evaporaor icing could be the cause.Technician B says that mold forming in the evaporator case and on the core could be the cause.Who is correct?

• A) Technician A only
• B) Technician B only
• C) Both A and B
• D) Neither A nor B

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Definitions:

Valence Shells

Valence shells are the outermost shell of an atom that contains the electrons most likely to be involved in chemical reactions.

Noble Gas

A group of chemical elements with similar properties under standard conditions; they are odorless, colorless, monatomic gases with very low chemical reactivity.

Electron Shell

The grouping of electrons surrounding the nucleus of an atom, where electrons exist in fixed energy levels.

Octet Rule

A chemical rule of thumb that states atoms tend to combine in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas.