Electrical Circuits and Safety Quiz
42 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which of the following best describes the relationship between amperage and electric current?

  • Higher amperage indicates a greater number of electrons and weaker current.
  • Higher amperage indicates fewer electrons and stronger current.
  • Higher amperage indicates fewer electrons and weaker current.
  • Higher amperage indicates a greater number of electrons and stronger current. (correct)
  • What is the primary function of a fuse in an electrical circuit?

  • To convert AC current to DC current.
  • To prevent excessive current from passing through the circuit. (correct)
  • To regulate the flow of current, ensuring a constant level.
  • To increase the voltage in the circuit.
  • In what scenario would a fuse most likely blow out?

  • When the grounding pin on an appliance is not properly connected.
  • When the voltage in the circuit is too low.
  • When a device is disconnected from the electric source.
  • When the circuit is overloaded with excessive current due to faulty equipment or too many appliances. (correct)
  • In modern electrical circuits, what device has largely replaced fuses, offering the advantage of being resettable?

    <p>Circuit breaker (B)</p> Signup and view all the answers

    Why is it important to disconnect an appliance and check connections before resetting a circuit breaker?

    <p>To prevent the possibility of the circuit breaker from tripping again due to the same fault. (A)</p> Signup and view all the answers

    What is the purpose of the grounding pin (third prong) on some electrical appliances?

    <p>To provide a safe path for electricity and protect the user from electrical shock. (A)</p> Signup and view all the answers

    Why is one prong slightly larger than the other on a standard two-prong plug?

    <p>To ensure the plug can only be inserted one way, protecting from electric shock. (B)</p> Signup and view all the answers

    In a standard two-prong plug, which prong is the 'hot' wire and what is its role?

    <p>The smaller prong; it supplies electric current to the circuit. (B)</p> Signup and view all the answers

    Why is it important to regularly flush microdermabrasion equipment with distilled water?

    <p>To prevent mineral buildup in the sprayer nozzle. (A)</p> Signup and view all the answers

    A client with which condition should avoid microdermabrasion due to contraindications?

    <p>Active herpes lesions (cold sores) (B)</p> Signup and view all the answers

    How does Vitamin C in C-Shield Anti-Pollution Drops prevent hyperpigmentation, according to GLO Skin Beauty?

    <p>By preventing melanin from forming in abnormal clumps. (C)</p> Signup and view all the answers

    During iontophoresis, what is the purpose of cataphoresis?

    <p>To infuse a positively charged product into the skin. (C)</p> Signup and view all the answers

    How does incandescent lighting affect the appearance of skin in a workspace?

    <p>It makes the skin appear warmer and golden. (C)</p> Signup and view all the answers

    Why is it recommended to use power strips with surge protectors when needing multiple plugs in one area?

    <p>To prevent overloading the circuit, which can cause the circuit breaker to trip. (A)</p> Signup and view all the answers

    What is the primary function of a Ground Fault Interrupter (GFI)?

    <p>To protect against electrical shock by interrupting the circuit when a leak is detected. (A)</p> Signup and view all the answers

    What should you do if you receive a light shock while using an electrical appliance?

    <p>Immediately stop using the appliance, turn it off, and unplug it or switch off the circuit breaker. (C)</p> Signup and view all the answers

    What is the best course of action if an electrical appliance is dropped in water and the outlet is NOT GFI protected?

    <p>Immediately shut off power to the entire shop at the breaker box, then unplug the appliance. (A)</p> Signup and view all the answers

    Why is it important not to alter an electrical plug?

    <p>Altering the plug can bypass safety features such as grounding, increasing the risk of electric shock. (B)</p> Signup and view all the answers

    What does a green light on a GFI socket typically indicate?

    <p>The GFI is working properly and ready to protect against electrical faults. (D)</p> Signup and view all the answers

    Which of the following is a recommended guideline for the safe use of electrical equipment?

    <p>Ensuring appliances are CSA approved. (B)</p> Signup and view all the answers

    What should you do if you observe sparks when plugging in or unplugging an appliance?

    <p>Immediately stop using the appliance or outlet until it has been inspected by a certified electrician. (C)</p> Signup and view all the answers

    Which of the following best explains the difference in how direct current (DC) and alternating current (AC) are produced?

    <p>DC is produced through chemical means providing a constant flow, while AC is produced through mechanical means involving rapid directional changes. (B)</p> Signup and view all the answers

    An appliance in a salon is rated at 1500 watts. How many kilowatts is this appliance using?

    <p>1.5 kilowatts (B)</p> Signup and view all the answers

    A salon technician wants to use a device that requires direct current (DC), but only has access to an alternating current (AC) outlet. Which apparatus would be needed to power the device?

    <p>A rectifier, to change AC to DC. (A)</p> Signup and view all the answers

    Why is it crucial for a hairdryer rated at 12 amps to have a thicker cord than one rated at 6 amps?

    <p>A thicker cord can safely carry the higher electrical current, preventing overheating and potential fire hazards. (C)</p> Signup and view all the answers

    In the context of electrical current, what does resistance (measured in ohms) directly affect?

    <p>Resistance affects the flow of current, where current flows only if the force is stronger than the resistance. (A)</p> Signup and view all the answers

    A client who is afraid of electric current is undergoing a facial treatment. Which of the following modalities should be avoided due to contraindications?

    <p>Any modality using electric current (A)</p> Signup and view all the answers

    Facial treatments utilize electric currents. Why is it important to use a current measured in milliamperes (mA) rather than amperes (A)?

    <p>An ampere current is too strong and could damage the skin or body. (C)</p> Signup and view all the answers

    A device is labeled '120V, 60W'. What does the '60W' indicate about the device?

    <p>When operating at 120 volts, the device consumes 60 watts of electrical energy per second. (D)</p> Signup and view all the answers

    An esthetician is using a Wood's Lamp during a skin analysis. What is the primary purpose of this lamp?

    <p>To illuminate fungi, bacterial disorders, and pigmentation problems. (C)</p> Signup and view all the answers

    After noticing the glass jar is cracked on your steamer, what would be the best course of immediate action?

    <p>Immediately replace the cracked glass jar with a spare one. (C)</p> Signup and view all the answers

    How are inverters and rectifiers similar, and how do they differ?

    <p>Both convert electrical current, but inverters change DC to AC, while rectifiers change AC to DC. (A)</p> Signup and view all the answers

    When should the vacuum machine be integrated during a facial treatment?

    <p>After desincrustation and before extractions to remove impurities. (A)</p> Signup and view all the answers

    Which of the following is a crucial safety precaution to observe when operating a facial steamer during a skincare treatment to prevent potential hazards?

    <p>Ensure the water level never runs low to prevent the glass from breaking if there is no auto shutoff. (D)</p> Signup and view all the answers

    Why is it important to use heat-resistant dishes when warming products in a hot towel cabinet?

    <p>To prevent plastic dishes from melting and contaminating the products. (C)</p> Signup and view all the answers

    How should glass devices of a vacuum machine be properly cleaned and disinfected to ensure hygiene and prevent cross-contamination between clients?

    <p>Clean with soap and water, then soak in disinfectant of appropriate strength. (B)</p> Signup and view all the answers

    A client with uncontrolled rosacea is scheduled for a facial. What precaution should the esthetician take regarding the use of hot towels?

    <p>The use of hot towels may be contraindicated due to the client's condition. (A)</p> Signup and view all the answers

    How does increasing the frequency of an electromagnetic wave typically affect its energy and penetration?

    <p>Increases energy and decreases penetration. (A)</p> Signup and view all the answers

    If a light source emits electromagnetic waves with a wavelength shorter than 380 nanometers, which of the following is most likely true?

    <p>It is in the ultraviolet spectrum and invisible to the human eye. (A)</p> Signup and view all the answers

    A scientist is designing a device to deliver energy deep into the skin. Considering the properties of different wavelengths, which type of light should they primarily use?

    <p>Infrared light, because it has longer wavelengths and deeper penetration. (D)</p> Signup and view all the answers

    What role does adenosine triphosphate (ATP) play in the context of light absorption by the human body?

    <p>It converts light energy into a form usable for cellular processes. (B)</p> Signup and view all the answers

    Approximately what percentage of natural sunlight is made up of invisible light?

    <p>65 percent (A)</p> Signup and view all the answers

    Flashcards

    Voltage

    A unit measuring the pressure that pushes electric current through a conductor.

    Normal Electric Wall Socket Voltage

    Standard wall sockets supply 120 volts, while larger appliances often use 240 volts.

    Fuse

    A safety device that melts to stop excessive current from passing through a circuit.

    Circuit Breaker

    A switch that shuts off a circuit to prevent overloads, can be reset without replacement.

    Signup and view all the flashcards

    Grounding

    A safety practice that directs excess current away to prevent electrical shock.

    Signup and view all the flashcards

    Hot Wire vs Neutral Wire

    The hot wire supplies current; the neutral wire completes the circuit safely.

    Signup and view all the flashcards

    Three-Prong Plug

    A plug with an extra grounding pin for added electrical safety.

    Signup and view all the flashcards

    Electrical Current

    The flow of electrons through a conductor; measured in amps.

    Signup and view all the flashcards

    Direct Current (DC)

    A type of electric current that flows in one direction steadily.

    Signup and view all the flashcards

    Alternating Current (AC)

    An electric current that reverses direction rapidly, changing 60 times per second.

    Signup and view all the flashcards

    Inverter

    A device that converts DC to AC, allowing battery power to run appliances.

    Signup and view all the flashcards

    Rectifier

    A device that converts AC to DC, necessary for recharging batteries.

    Signup and view all the flashcards

    Watt

    A unit that measures the energy consumption of electrical devices per second.

    Signup and view all the flashcards

    Ohm

    A unit of measurement for electrical resistance within a circuit.

    Signup and view all the flashcards

    Kilowatt (kW)

    A measure of electrical power equal to 1000 watts, used typically for household electricity.

    Signup and view all the flashcards

    Milliampere (mA)

    A unit that measures electric current, equal to 1/1000 of an ampere, used especially in facials.

    Signup and view all the flashcards

    Skin Analysis

    The process of assessing skin condition and needs for treatments.

    Signup and view all the flashcards

    Contraindications

    Situations or conditions where a procedure should not be performed.

    Signup and view all the flashcards

    Hot Towel Cabinet

    A warmer for towels, could include UV lamps to reduce bacteria.

    Signup and view all the flashcards

    Wood’s Lamp

    A filtered black light used to reveal skin issues like fungi and pigmentation.

    Signup and view all the flashcards

    Best Practices of The Steamer

    Guidelines to safely use a steamer for facial treatments and avoid risks.

    Signup and view all the flashcards

    Vacuum Machine

    A device that removes impurities and stimulates skin with suction.

    Signup and view all the flashcards

    Maintenance for The Vacuum Machine

    Cleaning protocol for vacuum machines to ensure hygiene and effectiveness.

    Signup and view all the flashcards

    Germicidal Cleansing

    A cleansing process that eliminates germs and bacteria from the skin.

    Signup and view all the flashcards

    Ground Fault Interrupter (GFI)

    A device designed to protect against electrical shock by interrupting the circuit when a leak is detected.

    Signup and view all the flashcards

    GFI Reset

    A button on the GFI outlet or panel that can reset the device after tripping.

    Signup and view all the flashcards

    Overloading Circuits

    Occurs when multiple plugs are used in one outlet, leading to potential breaker trips.

    Signup and view all the flashcards

    Power Strip with Surge Protector

    A device allowing multiple plugs in one outlet that provides protection against surges.

    Signup and view all the flashcards

    Fire Extinguisher Check

    Regularly inspecting fire extinguishers to ensure they are operational.

    Signup and view all the flashcards

    Response to Light Shock

    Immediate action is to stop using the appliance, turn it off, and unplug it.

    Signup and view all the flashcards

    Appliance Dropped in Water

    Do not use; if GFI is present, it will kill the circuit. Otherwise, shut the breaker off first.

    Signup and view all the flashcards

    Electrical Safety Guidelines

    Rules for safe appliance usage: use CSA approved devices, do not overload, check for sparks.

    Signup and view all the flashcards

    Microdermabrasion Benefits

    Improves fine lines, wrinkles, skin texture, and aids in acne scarring.

    Signup and view all the flashcards

    Microdermabrasion Contraindications

    Conditions that prevent microdermabrasion include herpes, fragile skin, and eczema.

    Signup and view all the flashcards

    Iontophoresis

    A technique using electric current for deeper skin product infusion, with positive or negative charges.

    Signup and view all the flashcards

    C-Shield Anti-Pollution Drops

    Vitamin C drops prevent hyperpigmentation by blocking abnormal melanin clumps.

    Signup and view all the flashcards

    Lighting Effects on Skin

    Different light types (fluorescent vs incandescent) affect how skin looks, cooler vs warmer tones.

    Signup and view all the flashcards

    Long Wavelengths

    Electromagnetic waves with low frequency and deep penetration.

    Signup and view all the flashcards

    Short Wavelengths

    Electromagnetic waves with high frequency and more energy, but less penetration.

    Signup and view all the flashcards

    Visible Light

    The part of the electromagnetic spectrum visible to the human eye, ranging from 380 to 700 nanometers.

    Signup and view all the flashcards

    Invisible Light

    Light that is not visible to the naked eye, including ultraviolet and infrared light.

    Signup and view all the flashcards

    Photoreceptive Melanin

    Pigment in skin cells that absorbs light particles and converts them into ATP.

    Signup and view all the flashcards

    Study Notes

    Light Energy

    • Light energy travels as waves.
    • White light contains all colors of the rainbow.
    • Light is refracted (bent) when it passes through a prism.
    • Electromagnetic waves are made of electric and magnetic fields.
    • Waves travel in wavelengths.
    • Infrared radiation is invisible but provides warmth.
    • Infrared is used in thermal imaging and remote controls.
    • Infrared is used in the synthesis of vitamin D.

    Electricity

    • Electricity is the movement of electrons.
    • Electricity is a form of energy.
    • Electricity does not occupy space or have mass.
    • It can create magnetic, chemical, and thermal effects.
    • Electric current is the flow of electricity.
    • Materials are either conductors or insulators.
    • Conductors allow electricity to flow easily.
    • Copper is a good conductor.
    • Water is a poor conductor but can be a good conductor if it has ions.
    • Insulators do not allow electricity to flow.
    • Rubber, silk, wood, glass, and cement are good insulators.

    Electric Circuits

    • A complete circuit allows current to flow continuously from a source through a conductor, back to the source.

    Types of Electrical Current

    • Direct Current (DC): Constant, even flow; travels in one direction; produced by chemical means (batteries).
    • Alternating Current (AC): Rapid, interrupted flow; changes direction; produced by mechanical means (60 times per second).

    Electrical Units

    • Watt (W): Unit of electrical power; measures how much energy is used per second (e.g., 40-watt light bulb uses 40 watts per second).
    • Ohm: Unit of electrical resistance; measures the opposition to current flow.
    • Kilowatt (kW): 1000 watts.
    • Milliampere (mA): 1/1000 of an ampere.

    Electrical Safety Devices

    • Fuse: Prevents excessive current by melting or blowing when overloaded and needs to be replaced.
    • Circuit Breaker: Automatically interrupts the flow of current when overload is detected, and it can be reset.

    Grounding

    • It completes an electrical circuit and carries the current safely away.
    • Electrical appliances have at least two rectangular prongs, one slightly larger than the other.
    • The hot wire is the smaller prong that must be inserted first into the outlet.
    • The larger prong completes the circuit.
    • Some appliances have a third grounding pin.

    Other Electrical Concepts

    • Ground Fault Interrupter (GFI): Designed to protect from electrical shock when there is a leak in the circuit.
    • Electrotherapy: Uses electrical equipment for corrective and therapeutic benefits.
    • Polarity: Refers to the poles of an electric current (positive or negative).
    • Anode: Positive pole, marked with a "+" sign.
    • Cathode: Negative pole, marked with a "-" sign.
    • Iontophoresis: Process of introducing positive or negative products using electric current.
    • Microcurrent: Extremely low-level electrical current used for firming, toning, and healing.
    • Tesla high-frequency current (violet ray): Thermal or heat-producing current with high oscillation rate.
    • Galvanic current: Direct current used for desincrustation and ionic iontophoresis.
    • Vacuum Machines: Used for removing impurities and lymphatic massage.
    • High-frequency machines: Uses alternating current (high frequency oscillating), produces heat and is suitable for product penetration; has no polarity.
    • Spray Machines: Used to add moisture and hydrate skin.

    Specific Equipment

    • Hot Towel Cabinets: Used for client towels and products for disinfection.
    • Wood's Lamp: Uses filtered black light to illuminate fungi and bacterial disorders.
    • Skin Scopes: Use UV light with an interior mirror to examine skin.

    Types of Light

    • Visible light: Electromagnetic waves we can see (380-700 nanometers).
    • Infrared light: Invisible light, next to red light on the electromagnetic spectrum at 800nm to 1000nm; used for heat and penetrates deeper.
    • UV light: Invisible light with higher energy than visible light; has three types: UVA (longest wavelengths, penetrates deep); UVB (associated with sunburns, shorter wavelengths); and UVC (blocked by ozone layer).

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    Study Note Test #1 PDF

    Description

    Test your knowledge on electrical circuits, including the role of amperage, fuses, and circuit breakers. This quiz also covers safety precautions and the purpose of grounding in electrical devices. Perfect for students and professionals in electrical engineering.

    More Like This

    Effects of Electricity on the Body Quiz
    34 questions
    Electrical Safety Precautions Quiz
    26 questions
    Electric Circuits Overview
    13 questions

    Electric Circuits Overview

    HeartwarmingNeodymium7825 avatar
    HeartwarmingNeodymium7825
    Use Quizgecko on...
    Browser
    Browser