PMU Needle Configuration & Machines 3

Question 1

In PMU machine terminology, 'Hz' refers to:

Accepted Answer

Number of needle cycles per second (frequency)

Answer

Hz (hertz) measures how many times per second the needle completes a full up-and-down cycle, affecting implantation speed.

Question 2

Which needle configuration is LEAST appropriate for creating fine, hairlike eyebrow strokes?

Accepted Answer

Curved 5M magnum

Answer

A curved magnum is a wide shading configuration unsuitable for fine hairstrokes, which require narrow, precise liners.

Question 3

What is the function of a needle cartridge's membrane in modern PMU handpieces?

Accepted Answer

Acts as a back-flow prevention barrier to protect the machine

Answer

The membrane inside a needle cartridge prevents blood and bodily fluids from traveling back up into the machine body, maintaining hygiene.

Question 4

A flat needle (F) configuration differs from a round liner (RL) primarily because flat needles are:

Accepted Answer

Soldered in a single straight row

Answer

Flat needles are arranged in a single straight horizontal row, producing a consistent line width suited for brow and liner work.

Question 5

When selecting needle protrusion length, a more superficial application (e.g., skin tone correction) requires:

Accepted Answer

Shorter protrusion to stay within the epidermis/upper dermis

Answer

Superficial corrections target only the uppermost skin layers, so minimal needle protrusion reduces risk of over-implantation.

(PMU) Permanent Makeup Certification Practice Test