8056648
Descripción
Test por Terri Vincent, actualizado hace más de 1 año
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Creado por Terri Vincent
hace más de 7 años
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Pregunta 1
Pregunta
Why is it important to know the names and appearance of lab equipment before doing laboratory work?
Respuesta
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So you will score higher on the lab test.
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So you can quickly obtain your laboratory supplies before lab.
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So you can follow the lab instructions clearly.
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So you can make sure everything has been cleaned before beginning the lab procedure.
Pregunta 2
Pregunta
What is the correct procedure to follow when smelling the odour of a chemical substance?
Respuesta
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Fan your hand over the substance toward your nose which should be directly over the beaker.
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Place your nose directly over the substance and take a big whiff.
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Fan your hand over the substance toward your nose which should be several centimetres away from the substance.
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Place your nose near the opening of the beaker and inhale.
Pregunta 3
Pregunta
Which of the following is NOT a safe lab practice?
Respuesta
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Keep chemicals, glassware, and other equipment away from the edge of the lab table.
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Report minor accidents to your lab supervisor and/or teacher.
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After removing glassware from a heat source touch it right away to see if it is cool.
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Heat chemicals in a flask without a stopper
Pregunta 4
Pregunta
Which of the following does NOT help explain why contact lenses should not be worn in lab?
Respuesta
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It is difficult to remove lenses after a chemical splash
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The lens is permeable to vapours, which cause irritation
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Chemicals trapped under lens will cause severe damage
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That boy or girl you are trying to get to see you cannot tell the colour of your eyes.
Pregunta 5
Pregunta
Which of the following is considered safety equipment in our classroom?
Respuesta
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Eyewash station
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First aid kit
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Fire extinguisher
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all of the above
Pregunta 6
Pregunta
What is the correct procedure for students to follow if a chemical is spilt?
Respuesta
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Stand back and advise the teacher of the spill
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Run madly about the room.
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Splash large amounts of water onto the spill.
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Tell everyone that your friend did it and that "Ooooh, they are in BIG trouble!".
Pregunta 7
Pregunta
I can perform an experiment of my own when:
Respuesta
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When I am sure it is safe to do so.
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Whenever I want to.
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Only with permission from the teacher.
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Never.
Pregunta 8
Pregunta
Keeping the work area neat and clean is important because:
Respuesta
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My teacher is a neat-freak
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I won't lose my supplies in the clutter.
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It keeps the room from looking messy.
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It helps prevent accident
Pregunta 9
Pregunta
If you are not sure what to do during a lab activity:
Respuesta
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Guess.
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Change lab partners.
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Ask the teacher.
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Just sit quietly and do nothing.
Pregunta 10
Pregunta
Goggle/ safety glasses and lab coats must be worn when using
Respuesta
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Fire.
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Glassware.
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Chemicals.
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All of the above.
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None of the above.
Pregunta 11
Pregunta
I can eat in the classroom:
Respuesta
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I want to.
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Only with permission from the teacher.
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When I am sure it is safe to do so.
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Never.
Pregunta 12
Pregunta
You should tie back long hair remove loose clothes (scarves)or flammable jackets when:
Respuesta
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Working near fire.
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Using chemicals in the lab.
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Trying to impress a friend.
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A and B
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A and B and C
Pregunta 13
Pregunta
You should make sure that equipment is clean:
Respuesta
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Before you use it
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After you use it
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Cleanliness doesn't matter
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Both A and B
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A,B and C
Pregunta 14
Pregunta
A pipette is a slender tube attached to or incorporating a bulb, for transferring or measuring out small quantities of liquid, especially in a laboratory.
Which of the following statements is correct about pipetting by mouth?
Respuesta
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Always - it is a fast and efficient method for transferring liquids
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Only when you can't find a pipette bulb or you think it might be dirty
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Only when you are sure that the teacher, your lab partner or the principal aren't looking
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Never - and if you thought yes to any other choice you should never be allowed in a lab
Pregunta 15
Pregunta
In the lab, sharp object should be carried:
Respuesta
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With the point facing out in front
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with the point down and away from the body
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with the point covered up by your hand
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so that the point will give your lab partner a pretty good jab
Pregunta 16
Pregunta
What should you do with any left over chemicals at the end of a lab session
Respuesta
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Put them back in the jar it came from
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pour it down the sink
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check with the teacher
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mix them all together
Pregunta 17
Pregunta
If you get chemicals in your eyes, you should flush them with water for:
Respuesta
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Less than 10 minutes
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10-15 minutes
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about 15-20 minutes
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more than 25 minutes
Pregunta 18
Pregunta
You should wash your hands after
Respuesta
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Touching a plant in the classroom
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handling one of the class pets
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Working with chemicals
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all of the above
Pregunta 19
Pregunta
To put out a fire in a person's hair or clothes, use:
Respuesta
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a fire blanket
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a handy chemical
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the wind from running around the room
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a fire extinguisher
Pregunta 20
Pregunta
Helping to clean up the lab or classroom is the job of:
Respuesta
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the older students
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the lab tech
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the teacher
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each and every student
Pregunta 21
Pregunta
Disturbing other students in the laboratory or class with horseplay (mucking around) is:
Respuesta
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helpful
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poor manners
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dangerous
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the quickest way to do the job
Pregunta 22
Pregunta
The most important thing in laboratory experiments is:
Respuesta
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getting it done first
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getting the answer right
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safety
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penmenship
Pregunta 23
Pregunta
During the heating of a liquid in a test tube, you should
Respuesta
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point the test tube towards others
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point the test tube away from any person
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place the test tube vertically up
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place the test tube so that you can see its top
Pregunta 24
Pregunta
which is the correct sequence to light up a bunsen burner
Respuesta
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light the match --> light the gas --> open air hole --> turn gas on --> close air hole
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turn on gas --> light up gas --> close air hole --> light match --> open air hole
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turn on gas --> close air hole --> light match --> open air hole --> light gas
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close air hole --> light match --> turn on gas --> light gas --> open air hole
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