Electrical Basics and Ohm's Law Quiz
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Questions and Answers

What is the primary purpose of the Community Right-to-Know Act (EPCRA)?

  • To ensure public access to information about hazardous substances (correct)
  • To provide financial compensation for chemical emergencies
  • To regulate the sale of pesticides in the market
  • To classify pesticides for restricted and general use
  • What classification must the EPA assign to a pesticide before it can be marketed?

  • Restricted Use or General Use (correct)
  • Toxic or Non-Toxic
  • Hazardous or Non-Hazardous
  • Home Use or Commercial Use
  • Which title of the Act specifically addresses the safe management of asbestos-containing materials in educational facilities?

  • Title IV - Lead Based Paint Exposure
  • Title II - Indoor Air Radon Abatement
  • Asbestos Hazard Emergency Response Act (correct)
  • Title III - Emergency Planning
  • Which event highlighted the need for the Community Right-to-Know Act due to its impact on chemical safety regulations?

    <p>The methyl isocyanate incident in Bhopal, India</p> Signup and view all the answers

    What is the role of machine guards according to the Guarding Principles?

    <p>To prevent contact with hazardous parts and emissions</p> Signup and view all the answers

    Under FIFRA, what is a requirement for selling or using a pesticide?

    <p>It must be registered with the EPA</p> Signup and view all the answers

    What characteristic of machine safety devices is essential for preventing injury?

    <p>Prevention of contact with moving parts and projectiles</p> Signup and view all the answers

    What effect does improper use have on a structure's integrity?

    <p>It can potentially lead to structural failure.</p> Signup and view all the answers

    In dynamic mechanics, what can cause a forklift to tip over?

    <p>Turning too sharply.</p> Signup and view all the answers

    What is the primary reason for soils failing in foundation support?

    <p>Unequal soil compression or movement.</p> Signup and view all the answers

    Which type of pressure exists when a wall resists the tendency of soil to slide into it?

    <p>Active pressure.</p> Signup and view all the answers

    According to Pascal's law, what does a fluid exert at any level?

    <p>An equal force in all directions.</p> Signup and view all the answers

    What is a primary limitation of interlocked guards?

    <p>They may hinder manual feeding operations.</p> Signup and view all the answers

    Which type of guard adapts to different production operations but may require frequent adjustments?

    <p>Adjustable Guard</p> Signup and view all the answers

    What does a self-adjusting guard do when the machine is at rest?

    <p>It pushes away to allow stock entry.</p> Signup and view all the answers

    Which method is used to enhance safety during maintenance and servicing work?

    <p>Lockout/Tagout procedures</p> Signup and view all the answers

    What is a downside of using self-propelled machines with interlock systems as utilized by grounds-keepers?

    <p>They may not allow for proper maintenance.</p> Signup and view all the answers

    Which of the following safety devices is not specifically mentioned as being part of the guarding techniques?

    <p>Foot pedals</p> Signup and view all the answers

    What is the main purpose of pullback devices in machine safety?

    <p>To automatically retract hands during operation.</p> Signup and view all the answers

    Which type of guard provides the least level of protection but can accommodate variable sizes of stock?

    <p>Self-Adjusting Guard</p> Signup and view all the answers

    What is a critical function of the hood guard used on circular table saws?

    <p>It provides vertical floating capabilities.</p> Signup and view all the answers

    Which of the following is NOT a consideration in the management of change procedures?

    <p>Financial impact of the change</p> Signup and view all the answers

    What is the maximum time allowed for initiating an incident investigation after an incident occurs?

    <p>48 hours</p> Signup and view all the answers

    How long must investigation reports be retained following an incident?

    <p>5 years</p> Signup and view all the answers

    What is the frequency of compliance audits as stated in the safety management practices?

    <p>Every 3 years</p> Signup and view all the answers

    Which of the following events is associated with the Bhopal disaster?

    <p>Runaway reaction explosion</p> Signup and view all the answers

    What information must be made available to those compiling process safety information?

    <p>All necessary information for compliance</p> Signup and view all the answers

    What should be included in the technical basis of a proposed change to a covered process?

    <p>Technical feasibility study</p> Signup and view all the answers

    What is the purpose of retaining the two most recent compliance audit reports?

    <p>To verify adequacy and compliance of procedures</p> Signup and view all the answers

    Which incident is part of the Flixboro tragedy?

    <p>Vapor cloud explosion</p> Signup and view all the answers

    What kind of changes do management of change procedures specifically exclude?

    <p>Replacements in kind</p> Signup and view all the answers

    Which of the following is NOT one of the four components of communication?

    <p>Decoder</p> Signup and view all the answers

    What is the first priority when addressing hazards?

    <p>Eliminate or replace the hazard</p> Signup and view all the answers

    Which method is effective for reducing the severity of hazards?

    <p>Placing hazards where there are few people</p> Signup and view all the answers

    What is NOT a strategy for reducing the probability of hazard occurrence?

    <p>Increasing operational speed</p> Signup and view all the answers

    Historical data is useful in hazard control for which reason?

    <p>To identify or anticipate existing hazards</p> Signup and view all the answers

    What is a critical aspect of a redundancy-backup system?

    <p>It reduces the probability of error or failure</p> Signup and view all the answers

    Which action is typically taken last in the hierarchy of hazard control principles?

    <p>Providing safety procedures and protective equipment</p> Signup and view all the answers

    Which component of hazard control is responsible for measuring effectiveness?

    <p>Providing a means for evaluation</p> Signup and view all the answers

    Which of the following is the least effective hazard control measure for reducing an incident’s severity?

    <p>Implementing emergency response plans</p> Signup and view all the answers

    What is a common misconception about sprinkler systems regarding fire safety?

    <p>They completely prevent fire outbreaks.</p> Signup and view all the answers

    Study Notes

    Electrical Basics

    • Voltage: difference in charge between two points
    • Current: rate of charge flow
    • Resistance: material's opposition to current flow

    Ohm's Law

    • V = I x R (Voltage = Current x Resistance)
    • Units: Volts (V), Amperes (A), Ohms (Ω)
    • 1 Amp = 1 Coulomb

    Series Circuits

    • Components connected along a single path
    • Same current flows through all components
    • Total resistance is the sum of individual resistances

    Parallel Circuits

    • Current divides through separate paths
    • Current to each element is separate
    • If one element fails, the circuit continues

    Direct Current (DC)

    • Unidirectional current flow

    Alternating Current (AC)

    • Current periodically reverses direction
    • Total positive and negative values of current are equal

    Resistance (Series Circuit)

    • Rseries = R1 + R2 + ... + Rn

    Resistance (Parallel Circuit)

    • 1/Rt = 1/R1 + 1/R2 + ... + 1/Rn

    Voltage in AC Circuits

    • V = √(P / cosФ) where V = voltage, I = impedance, Ф = phase angle, P = true power

    Power in DC Circuits

    • P = VI where P = power (W), V = voltage, I = current

    Power in AC Circuits

    • P=V2cosФ/R where P = Power (W), V = Voltage, Ф = phase angle, R = Resistance

    Joules Law

    • P= I2R=IV=V2/R
    • Calculate the amount of heat produced by Electrical Power

    Capacitors

    • Passive component consisting of two conductors separated by a dielectric
    • Stores energy in an electric field
    • Measured in farads (F)

    Capacitance (Series Circuit)

    • 1/Ct = 1/C1 + 1/C2 + ... + 1/Cn

    Capacitance (Parallel Circuit)

    • Cparallel = C1 + C2 + ... + Cn

    Oscillators

    • Electronic circuits designed to produce high-frequency alternating currents

    Thermocouple

    • A sensor that measures temperature, Converting heat energy into electrical energy

    Inductors

    • Passive components that store energy in a magnetic field
    • Measured in Henries (H)

    Electrical Shock Hazards

    • Severity depends on current amount and duration
    • Body resistance is a factor
    • Different current levels produce different effects (e.g., 5mA, slight shock, 50-150 mA, freezing current)

    Types of Burns

    • Flash
    • Arc
    • Thermal
    • Electrical

    Explosions

    • Arcing in combustible atmospheres
    • Chemical reactions in presence of vapors can cause explosions

    Wire Size and Length

    • Longer wires have more resistance; higher resistance leads to more heat
    • Wire gauge and type are important for safety

    Hazards and Classifications

    • Locations with flammable or ignitable mixtures require specific safety protocols
    • Locations with combustible dust requires specific safety protocols

    Locating Equipment

    • Electrical equipment should be placed so people and other gear cannot contact
    • Proper shielding and barriers should be in place for safety

    Sealed Equipment

    • Intrinsically safe electrical equipment is designed for hazardous environments, with reduced internal energy

    Lockouts

    • Using locks or tags for safety protection of equipment
    • Used to prevent accidental activation of equipment, by controlling energy sources

    Interlocks

    • A switch to prevent access to energized equipment or dangerous locations
    • Designed to shut off power when a door is opened or a panel is removed

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    Description

    Test your understanding of the fundamentals of electricity, including voltage, current, and resistance. This quiz covers Ohm's Law, series and parallel circuits, and the differences between direct and alternating current. Challenge yourself to apply these concepts in practical scenarios.

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