Electricity & Electrical Safety Study Guide

Advanced electrical machines require an understanding of _________________ .

• _________________.

• basic electrical principles

• mechanical systems

• thermodynamics

Electricity use impacts ______ of the services that beauty professionals offer their clients.

• the quality

• the cost

• the duration

• the availability

Energy moves through space by:

• conduction

• convection

• radiation

• evaporation

What is true of ultraviolet light? ________________

• It has a shorter wavelength than visible light.

• It is visible to the human eye.

• It has a longer wavelength than infrared light.

• It is not harmful to human skin.

Electricity ________________ occupy space or has mass.

• does not

• does

• can

• might

What types of energy is most likely associated with nuclear power plants?

• Thermal energy

• Electrical energy

• Nuclear energy

• Chemical energy

Grounding is important because:

• it provides stability and safety.

• it is a decorative feature.

• it increases electrical resistance.

• it reduces the need for insulation.

The difference between direct current and alternating current is:

• Direct current flows in one direction, while alternating current changes direction periodically.

• Direct current changes direction periodically, while alternating current flows in one direction.

• Both direct current and alternating current flow in one direction.

• Both direct current and alternating current change direction periodically.

Copper is used in electrical wiring and electrical motors because:

• it is a good conductor of electricity.

• it is a poor conductor of electricity.

• it is a good insulator.

• it is a poor insulator.

Does infrared light cause heat?

• Yes, infrared light does cause heat.

• No, infrared light does not cause heat.

• Infrared light only causes light, not heat.

• Infrared light causes cold.