Laboratory Safety and Chemicals Quiz
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Questions and Answers

What is the primary benefit of just-in-time inventory for a laboratory?

  • It allows the lab to predict chemical usage accurately.
  • It increases the variety of chemicals available to the lab.
  • It ensures all chemicals are stored in compliance with OSHA.
  • It reduces the need for warehouse space for the employer. (correct)

    • Which grade of chemical is recognized as having the highest purity?

  • ACS (correct)
  • Practical grade
  • AR
  • USP

    • What information is NOT required by OSHA for chemical exposure in laboratories?

  • Vendor's contact information.
  • Data on solutions containing harmful chemicals less than 1%. (correct)
  • Monthly chemical usage rates.
  • Chemical hazard classifications.

    • What is the potential consequence of flooding a corrosive powder burn with water?

    <p>It will activate the chemical and deepen the burn.</p> Signup and view all the answers

    Which chemical grade is typically used for teaching purposes due to its impurities?

    <p>Lab grade</p> Signup and view all the answers

    What does the acronym MSDS stand for in chemical safety?

    <p>Material Safety Data Sheet</p> Signup and view all the answers

    Which chemical grade is meant for in-house lab work and is usually as pure as ACS but lost certification?

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

    Which chemical grade is considered good quality but impure and intended only for industrial use?

    <p>Technical grade</p> Signup and view all the answers

    What is a significant advantage of an autologous transfusion over an allogeneic transfusion?

    <p>It eliminates the possibility of transfusion reactions.</p> Signup and view all the answers

    Which of the following is NOT a type of autologous blood donation?

    <p>Direct allogeneic donation</p> Signup and view all the answers

    What should be done if a patient shows signs of a transfusion reaction during a blood transfusion?

    <p>Stop the transfusion immediately.</p> Signup and view all the answers

    When storing red blood cells that have never been frozen, what is the proper temperature range?

    <p>1°C to 6°C</p> Signup and view all the answers

    What is a common potential drawback of autologous blood donation?

    <p>Increased costs and time consumption</p> Signup and view all the answers

    Which of the following actions should be taken immediately after a transfusion reaction is suspected?

    <p>Notify the attending physician and perform a patient assessment.</p> Signup and view all the answers

    What is the purpose of checking vital signs every 15 minutes during a blood transfusion?

    <p>To monitor for transfusion reactions.</p> Signup and view all the answers

    What should be done with the blood bag after a transfusion reaction occurs?

    <p>Take it back to the lab for investigation.</p> Signup and view all the answers

    What is a significant risk factor for falls in patients with central nervous system disorders?

    <p>Weak or spastic muscles</p> Signup and view all the answers

    Which of the following best describes disease incidence?

    <p>The measure of how prevalent a disease is in a population over time</p> Signup and view all the answers

    What does positive predictive value indicate?

    <p>The likelihood that a patient with a positive test result really has the condition</p> Signup and view all the answers

    What factor does NOT contribute to immunosuppression?

    <p>Patients with high blood pressure</p> Signup and view all the answers

    Why is sensitivity important in medical testing?

    <p>It helps in early disease detection or epidemic prevention.</p> Signup and view all the answers

    Which of the following conditions can complicate assessments due to sensory impairments?

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

    What psychological issue is indicated to complicate patient care?

    <p>Uncontrolled pain</p> Signup and view all the answers

    What is the role of ethnicity in evaluating disease incidence?

    <p>It is one of the variables affecting the likelihood of disease development.</p> Signup and view all the answers

    What should you do before using taps to wash your hands?

    <p>Remove all jewelry</p> Signup and view all the answers

    Which of the following is an acceptable practice for food and beverages in the lab?

    <p>Keeping drinks in a separate refrigerator during tolerance tests</p> Signup and view all the answers

    When is it permissible for a phlebotomist to perform a venipuncture without gloves?

    <p>When the phlebotomist has experienced hands</p> Signup and view all the answers

    What is the minimum alcohol percentage recommended for hand sanitizers in the absence of a sink?

    <p>70% to 80%</p> Signup and view all the answers

    What is NOT a requirement for phlebotomists to refrain from gloving?

    <p>The phlebotomist has a visible rash</p> Signup and view all the answers

    What should you do while scrubbing your hands with soap?

    <p>Interlace your fingers while rubbing them together</p> Signup and view all the answers

    What is the proper procedure for disposing of disposable antiseptic towelettes after use?

    <p>Dispose of them in specially designated biohazard containers</p> Signup and view all the answers

    Which of these practices could affect lab results if not avoided?

    <p>Smoking in the laboratory</p> Signup and view all the answers

    What is the principle behind Beer’s law?

    <p>Absorbance is directly proportional to concentration.</p> Signup and view all the answers

    Which statement is true regarding transmittance?

    <p>A completely transparent sample has 100% transmittance.</p> Signup and view all the answers

    At what absorbance range does Beer’s law apply?

    <p>0.1 to 1.0</p> Signup and view all the answers

    When preparing a solution for spectrophotometry, if the volume of the sample falls below 15 mL, what should be done?

    <p>Add distilled water up to 25 mL.</p> Signup and view all the answers

    What is the purpose of using quartz cuvettes in spectrophotometry?

    <p>They offer a more accurate measurement for DNA and stock solutions.</p> Signup and view all the answers

    What should not be used to clean quartz cuvettes?

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

    What is the role of the coarse adjustment knob on a microscope?

    <p>It moves the objectives up and down.</p> Signup and view all the answers

    Which of the following parts of the microscope is responsible for supporting and carrying it securely?

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

    What should be done to the immersion oil after using the microscope?

    <p>Clean the lens with xylene and lens paper</p> Signup and view all the answers

    What is a consequence of not balancing a centrifuge before use?

    <p>The blood samples may hemolyze</p> Signup and view all the answers

    Which features are necessary for lab refrigerators storing flammable liquids?

    <p>Explosion-proof design and self-closing doors</p> Signup and view all the answers

    How should tubes be arranged in a centrifuge to ensure balance?

    <p>Position sealed tubes with equal volumes opposite each other</p> Signup and view all the answers

    What should not be done while removing a tube from a centrifuge?

    <p>Gently jiggle the tube to loosen it</p> Signup and view all the answers

    What is the maximum temperature setting for a blood bank refrigerator?

    <p>+4°C</p> Signup and view all the answers

    What type of materials can be stored in lab refrigerators according to their classifications?

    <p>No more than 120 gallons of Class I, II, and IIIA liquids</p> Signup and view all the answers

    When should spills near a centrifuge be cleaned up?

    <p>After the centrifuge has stopped, using alcohol on a cloth</p> Signup and view all the answers

    Study Notes

    Medical Technologist Exam Secrets Study Guide

    • This study guide is effective and affordable, providing comprehensive test preparation.
    • The goal of the guide is to cover exam content, and provide insight into typical test-taking mistakes.
    • Standardized tests are important for future success; the guide helps you excel on test day.
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    • Use repetition to learn and understand information and concepts effectively.
    • Study guide is fast-paced and fluff-free.

    How to Use the Study Guide

    • Read the guide completely to grasp content and organization; start with success strategies, then specific content sections.
    • Reread the guide and take notes in the margins; highlight sections presenting difficulties.
    • Study the guide on test day before beginning the exam.

    Table of Contents

    • Top 20 Test-Taking Tips
    • Blood Bank
    • Laboratory Practice
    • Chemistry, Urinalysis Tests
    • Chemistry
    • Urinalysis
    • Hematology
    • Immunohematology
    • Microbiology, Bacteriology
    • Mycology, Parasitology, Virology
    • Immunology
    • Practice test, practice questions
    • Answers, explanations
    • Secret Key #1 Time is your greatest enemy
    • Secret Key #2 Guessing is not guesswork
    • Secret Key #3 Practice smarter
    • Secret Key #4 Prepare, don't procrastinate
    • Secret Key #5 Test yourself
    • General Strategies
    • Special Report: Additional Bonus Material

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    Medical Technologist Exam Secrets PDF

    Description

    Test your knowledge on laboratory safety regulations and chemical grades with this quiz. Questions cover topics such as the benefits of just-in-time inventory, the purity of chemical grades, and procedures for blood transfusion. Perfect for students and professionals in laboratory sciences.

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