Questions Lab Safety: Quiz!

15 Questions | Total Attempts: 318

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Questions Lab Safety: Quiz!

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Questions and Answers
  • 1. 
    The student's used correct lab practice when handling samples of pond water. Which practice is NOT an example of correct lab practice?
    • A. 

      Wearing disposable gloves.

    • B. 

      Discarding samples down the drain

    • C. 

      Disinfecting the lab countertop before and after each lab session

    • D. 

      Washing hands before and after each lab session

  • 2. 
    Which technique is NOT a proper procedure for a classroom lab activity?
    • A. 

      Using a compound microscope, first focusing on the specimen using a low power, then switching to a higher power.

    • B. 

      Turning on the gas of a Bunsen burner to adjust the gas flow, then striking a match to test it.

    • C. 

      Determining the odor of a burning substance by fanning, with your hand, the scent from a test tube towards your nose.

    • D. 

      Cleaning up liquid that spilled onto the floor immediately.

  • 3. 
    To enhance laboratory safety, how should students begin a new laboratory activity?
    • A. 

      Wait until other students begin and then follow their lead.

    • B. 

      Gather supplies immediately and read the directions as needed.

    • C. 

      Begin immediately and gather supplies as needed.

    • D. 

      Read the laboratory exercise and gather supplies before beginning.

  • 4. 
    When Jim used a compound light microscope to study plant cells, he cracked the glass specimen slide. Which microscope technique most likely caused him to rack the slide?
    • A. 

      Using coarse focus with the low power lens.

    • B. 

      Using coarse focus with the high power lens.

    • C. 

      Using the fine focus with the low power lens.

    • D. 

      Using the fine focus with the high power lens.

  • 5. 
    Keiko transfers samples of bacteria from a culture tube to several Petri dishes. Which technique should she use to minimize contamination of the culture?
    • A. 

      Setting the Petri dish lid on the lab table.

    • B. 

      Holding the culture tube upright when the lid is off.

    • C. 

      Disinfecting the lab table before and after the transfer.

    • D. 

      Sliding the transfer pipette along the side of the culture tube.

  • 6. 
    Which laboratory safety procedure is most important for a student working with bacterial cultures?
    • A. 

      Storing nutrient agar in a beaker.

    • B. 

      Wearing rubber gloves and a lab coat.

    • C. 

      Using warm water to clean glassware.

    • D. 

      Recording data neatly in a notebook.

  • 7. 
    You may eat or drink during a laboratory activity.
    • A. 

      After you have washed your hands.

    • B. 

      Never.

    • C. 

      From laboratory equipment.

    • D. 

      At any time.

  • 8. 
    In the picture below, which of the following procedures is unsafe?
    • A. 

      The students are looking at each other.

    • B. 

      The boy is using tongs to heat the test tube.

    • C. 

      The girl has her hair tied back.

    • D. 

      All of the above

    • E. 

      None of the above

  • 9. 
    In the picture below, what are the students doing incorrectly?
    • A. 

      Labeling chemicals

    • B. 

      Reaching across a flame

    • C. 

      Wearing goggles

    • D. 

      Both a and b

    • E. 

      Both b and c

  • 10. 
    What should you do with your waste chemicals from your lab when you are done performing the experiment?
    • A. 

      Pour it down the drain

    • B. 

      Leave it in the container you have it in

    • C. 

      Pour it back into the original container

    • D. 

      Deposit it in appropriate waste beakers in the front of the room, unless your teacher tells you it is safe to pour the contents down the drain

  • 11. 
    Your notebook accidentally catches fire during an experiment. You should
    • A. 

      Ask your partner where the fire extinguisher is.

    • B. 

      Douse it with the contents of the nearest beaker that contains a liquid.

    • C. 

      Notify your teacher at once.

    • D. 

      Both a and c.

  • 12. 
    Your hand is accidentally splashed with a few drops of dilute hydrochloric acid. You should
    • A. 

      Notify your teacher at once.

    • B. 

      Pat your hand dry with a paper towel.

    • C. 

      Flush your hand with running water from a faucet.

    • D. 

      Both a and c.

  • 13. 
    Your laboratory procedure instructs you to pour six different solutions into separate beakers for use in a chemical test. You should
    • A. 

      Pour all of the solutions into beakers and then label the beakers.

    • B. 

      Pour one solution at a time, labeling each beaker after pouring the solution into it.

    • C. 

      Label all beakers first and then pour the correct solution into each.

    • D. 

      Not worry about labeling the beakers because you will remember which beaker contains each solution.

  • 14. 
    You have read about the hazards of the chemicals you will be using in a particular lab, and found out that they are mild health hazards. You should avoid skin contact and vapor inhalation. In the lab you should:
    • A. 

      Wear shorts and sandals

    • B. 

      Wear long pants, closed toe shoes, and a lab apron

    • C. 

      Wear gloves

    • D. 

      B and c

    • E. 

      A and c

  • 15. 
              Treat all microorganisms as if they were:
    • A. 

      Harmful.

    • B. 

      Harmless.

    • C. 

      Dead.

    • D. 

      Antiseptic.

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