____ Is Used in Tips Having Eight Preheat Holes or in a Two-Piece

question 12

Multiple Choice

____ is used in tips having eight preheat holes or in a two-piece tip that is not recessed.

• A) MPS gas
• B) Acetylene
• C) Natural gas
• D) Propane

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Definitions:

Organic Compound

A compound consisting of a backbone made up of carbon atoms.

Inorganic Compound

A simple substance that does not contain a carbon backbone.

Carbon

Carbon is a chemical element with symbol C and atomic number 6, essential to life on Earth, forming a vast number of compounds including fossil fuels and DNA.

Valence Electrons

The electrons in the outer electron shell, known as the valence shell, of an atom; in the formation of a chemical bond, an atom can accept electrons into its valence shell or donate or share valence electrons.