Final answer:
Chromatic scales are typically used in sections of a piece to add tension or embellish melodies, confirming that the statement is true.
Step-by-step explanation:
The statement that chromatic scales are usually employed in only a part or a section of a piece is true. A chromatic scale consists of 12 pitches, each a semitone above or below another.
Its primary use in compositions is to add tension, transition between sections, or to embellish melodies.
While it is possible to write an entire piece using the chromatic scale, it is more commonly found in fragments within a piece to achieve a specific musical effect or to add color to the melody or harmony.