Biology and Occupational Health Quiz
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Questions and Answers

What factor is NOT used to determine the relative health hazard of an occupational contaminant?

  • Concentration of exposure
  • Duration of exposure
  • Probability of absorption
  • Age of exposed employees (correct)

    • What is the primary characteristic of a virus?

  • Contains DNA and RNA
  • Unicellular organism
  • Able to reproduce independently
  • Cannot grow outside a host cell (correct)

    • What is the main function of antibodies in the human body?

  • To fight foreign substances (correct)
  • To transport oxygen
  • To provide energy for cells
  • To absorb nutrients

    • Which layer of skin is referred to as the epidermis?

    <p>Outer layer</p> Signup and view all the answers

    Which sampling method involves selecting items based on specific characteristics and then randomly choosing from within those groups?

    <p>Stratified sample</p> Signup and view all the answers

    What is the role of the cochlea in the inner ear?

    <p>To convert fluid waves into electrical signals</p> Signup and view all the answers

    Which nerve carries signals from the cochlea to the brain?

    <p>Cochlear nerve</p> Signup and view all the answers

    What term describes the pressure exerted by a volatile liquid when it reaches equilibrium conditions?

    <p>Vapor pressure</p> Signup and view all the answers

    The organ of Corti is primarily associated with what function?

    <p>Detection of sound frequencies</p> Signup and view all the answers

    What type of stress occurs when a material is twisted in one direction while the other end is held stationary?

    <p>Torque stress</p> Signup and view all the answers

    Which sampling method ensures each item from a population has an equal chance of being selected?

    <p>Random sample</p> Signup and view all the answers

    What is the tympanic membrane commonly known as?

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

    At what point does the vapor pressure of a liquid equal the atmospheric pressure?

    <p>Boiling point</p> Signup and view all the answers

    What is the defining characteristic of a cryogenic liquid?

    <p>It has a boiling point below -150° C.</p> Signup and view all the answers

    Which of the following best describes exothermic reactions?

    <p>They release heat and increase the temperature of their surroundings.</p> Signup and view all the answers

    Which type of stress results from materials sliding against each other in opposite directions?

    <p>Shear stress</p> Signup and view all the answers

    What is the primary focus of descriptive statistics?

    <p>To summarize population data</p> Signup and view all the answers

    What does a Type I error refer to in statistical hypothesis testing?

    <p>Incorrectly rejecting the null hypothesis</p> Signup and view all the answers

    What does anthropometry study?

    <p>Proportions of the human body</p> Signup and view all the answers

    Which of the following accurately describes a confidence interval?

    <p>A statistical range that accounts for random error</p> Signup and view all the answers

    What is the purpose of safety sampling?

    <p>To measure the effectiveness of safety activities</p> Signup and view all the answers

    Which of the following statements about Type II error is correct?

    <p>It occurs when the null hypothesis is accepted when it is false.</p> Signup and view all the answers

    What is a histogram used to represent?

    <p>The frequency distribution of a set of data</p> Signup and view all the answers

    What is the function of bronchioles in the respiratory system?

    <p>To facilitate the exchange of gases in the alveoli</p> Signup and view all the answers

    Which statement describes concurrent forces?

    <p>They have a common point of intersection.</p> Signup and view all the answers

    What characterizes coplanar forces?

    <p>They all act on a two-dimensional surface.</p> Signup and view all the answers

    How are isotopes of the same element defined?

    <p>Atoms with different nuclear masses but the same number of protons.</p> Signup and view all the answers

    What describes tensile force?

    <p>It tends to elongate the body.</p> Signup and view all the answers

    Which type of hydrocarbon contains only single covalent bonds?

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

    What happens to gases with a molecular weight greater than 29?

    <p>They will sink.</p> Signup and view all the answers

    What characteristic distinguishes alkynes from other hydrocarbons?

    <p>Presence of triple bonds between carbon atoms.</p> Signup and view all the answers

    What is chemiluminescence?

    <p>The emission of light during a noncombustible chemical reaction.</p> Signup and view all the answers

    What is the primary purpose of the 'A' weighting network on a sound level meter?

    <p>To simulate the response of the human ear</p> Signup and view all the answers

    When combining decibel levels from two noise sources differing by 3 dB, what should be added to the higher decibel level?

    <p>2</p> Signup and view all the answers

    What does a noise dosimeter measure?

    <p>Cumulative exposure to noise energy over time</p> Signup and view all the answers

    What is the frequency range typically measured by noise measuring equipment?

    <p>20 - 20,000 Hz</p> Signup and view all the answers

    In the formula for percentage error, which of the following correctly describes EV and TV?

    <p>EV is the experimental value and TV is the true value</p> Signup and view all the answers

    How is cumulative error calculated according to the provided formula?

    <p>By squaring each error and then taking the square root of the total</p> Signup and view all the answers

    Which type of instrument is primarily used for understanding the frequency spectrum of noise energy?

    <p>Octave-Band Analyzer</p> Signup and view all the answers

    If the true value is 27% ppm and the experimental value is 33%, what is the error of measurement?

    <p>22%</p> Signup and view all the answers

    What is the formula to calculate total resistance in a series circuit?

    <p>$R_t = R_1 + R_2 + R_3$</p> Signup and view all the answers

    What is the relationship between sound intensity and decibels when doubling sound intensity?

    <p>It results in a 3 dB increase.</p> Signup and view all the answers

    How is the WBGT calculated when considering solar load?

    <p>WBGT = 0.7 WB + 0.2 GT + 0.1 DB</p> Signup and view all the answers

    Which equation is used to calculate power when considering force, distance, and time?

    <p>$P = (force imes distance) / time$</p> Signup and view all the answers

    What is the effect of reducing the distance from a sound source on its sound pressure level?

    <p>The SPL increases by 6 dB for each halving of distance.</p> Signup and view all the answers

    What does the adiabatic lapse rate refer to?

    <p>The decrease in air temperature with increasing altitude.</p> Signup and view all the answers

    What happens when two sound intensities of 70 dB are combined?

    <p>The total sound intensity is approximately 73 dB.</p> Signup and view all the answers

    Which equation represents the total resistance in parallel circuits?

    <p>$1/R_t = 1/R_1 + 1/R_2$</p> Signup and view all the answers

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    Description

    Test your knowledge with this quiz that covers various topics in biology and occupational health. Questions range from the characteristics of viruses to the functions of the inner ear and the role of antibodies. Perfect for students studying health sciences or professionals in the field.

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