Cosmetology Test Electricity and Light Therapy

Question 1

Which type of electrical current flows in only one direction and is used in galvanic treatments?

Accepted Answer

Direct current (DC)

Answer

Direct current (DC) flows in one direction only, which is why it is used in galvanic facial treatments that rely on a consistent polarity.

Question 2

What unit is used to measure electrical resistance in a circuit?

Accepted Answer

Ohm

Answer

Electrical resistance is measured in ohms, named after physicist Georg Simon Ohm who developed the foundational law of electrical circuits.

Question 3

Which safety device is designed to break a circuit by melting when too much current flows through it?

Accepted Answer

Fuse

Answer

A fuse is a safety device containing a metal wire that melts and breaks the circuit when current exceeds a safe level, preventing fires and equipment damage.

Question 4

What does electrical grounding provide in salon electrical safety?

Accepted Answer

A safe path for excess electrical current to discharge into the earth

Answer

Grounding provides a safe pathway for stray or excess electrical current to discharge harmlessly into the earth, protecting clients and cosmetologists from electric shock.

Question 5

In cosmetology, galvanic current is primarily used for which two facial services?

Accepted Answer

Iontophoresis and desincrustation

Answer

Galvanic current powers iontophoresis (driving ionic products into the skin) and desincrustation (using alkaline reaction to dissolve sebum and debris in pores).

Cosmetology Test Practice Test

Cosmetology Test Practice Test

Cosmetology Test Electricity and Light Therapy