Chapter 8 Flashcards
Improperly repaired tools and appliances can result in _______________.
A) electrical pressure
B) blown circuit breakers
C) twisted metal threads
D) alternating current
B) blown circuit breakers
A(n) __________________ is the flow of electricity along a conductor.
A) rheostat
B) insulator
C) electric current
D) electric circuit
C) electric current
Electricity is a form of energy created by the flow of electrons between _______________.
A) atoms
B) acids
C) salts
D) metals
A) atoms
Electricity is not matter because it does not _____________.
A) control the current
B) produce a chemical reaction
C) move through or across matter and space
D) occupy space of have mass
D) occupy space it have mass
Which of the following can move through or across matter and space?
A) ultraviolet light
B) electricity
C) light emitting diodes
D) electromagnetic radiation
B) electricity
A(n) ______________ is an adjustable resistor that is used for controlling the current in a circuit.
A) rectifier
B) insulator
C) rheostat
D) battery-operated instrument
C) rheostat
Which of the following is considered a good conductor?
A) rubber
B) cement
C) silk
D) watery solutions of acids and salts
D) watery solutions of acids and salts
What does the volt measure?
A) electrical pressure
B) strength or rate of an electric current
C) electrical resistance
D) how much electric energy is being used in 1 second
A) electrical pressure
The electricity in a house is measured in ____________.
A) amperes
B) kilowatt-hours
C) milliamperes
D) ohms
B) kilowatt-hours
What safety device prevents the overheating of electrical wires by preventing excessive current from passing through a circuit?
A) three-prong plug
B) ground fault interrupter
C) fuse
D) circuit breaker
C) fuse
In modern electric circuits, which of the following has replaced fuses and can be reset l?
A) circuit breakers
B) adjustable resistors
C) rectifiers
D) ground fault interrupters (GFIs)
A) circuit breakers
All electrical appliances must have at least two electrical connections. One connection is ___________ and the other is ______________.
A) hot/cold
B) neutral/cold
C) live/hot
D) neutral/live
D) neutral/live
How should you disconnect an appliance?
A) by pulling on the cord
B) by setting on the cord
C) by pulling on a plug
D) by twisting a plug
C) by pulling on the plug
Which of the following should you not touch while using an electrical appliance?
A) rubber
B) plastic
C) glass
D) metal
D) metal
_____________ indicates the negative or positive pole of an electric current.
A) activity
B) polarity
C) elasticity
D) modality
B) polarity
What type of current is a DC, using a negative and positive pole, that is reduced to a safe, low-voltage level?
A) high frequency
B) micro-current also add
C) Tesla
D) galvanic
D) galvanic
What process introduces water-soluble products into the skin?
A) iontophoresis
B) deincrustation
C) cataphoresis
D) anaphoresis
A) iontophoresis
During what process is galvanic current used to create a chemical reaction that acts to emulsify the sebum and waste in the pores?
A) cataphoresis
B) anaphoresis
C) desincruatacion
D) iontophoresis
C) deincrustation
What effect can micro-currents Produce?
A) decrease muscle tone
B) produce a softer appearance to aging skin
C) decrease metabolism
D) restore elasticity
D) restore elasticity
What current is commonly called the violet ray and is used for both scalp and facial treatments?
A) electrotherapy
B) galvanic
C) Tesla high-frequency
D) mucrocurrent
C) Tesla high-frequency
Gamma rays are used ______________.
A) for nuclear power plants
B) by physicians and dentists
C) for light therapy services
D) in microwave ovens
A) nuclear power plants
Which light rays are used in ultraviolet germicidal irradiation to inactivate or destroy microorganisms?
A) visible light
B) uvb rays
C) uvc rays
D) infrared light
C) UVC rays
In the field of barbering we are concerned with the invisible rays found at the two ends of the visible spectrum of light: infrared rays, which produce heat, and ultraviolet rays, which produce ________________.
A) chemical and germicidal reactions
B) mechanical actions
C) electric current
D) magnetic reactions
A) chemical and germicidal reactions
Within the visible spectrum of light, ___________ has the shortest wavelength and ______________ has the longest.
A) yellow, red
B) violet, red
C) yellow, green
D) violet, indigo
B) violet, red
