1. What is laboratory safety?
Place where scientific research and development is conducted and analyses performed, in contrast with the field or factory.
A laboratory is a facility that provides controlled conditions in which scientific or technological research, experiments, and measurement may be performed.
the condition of being protected from or unlikely to cause danger, risk, or injury.
proper laboratory practices and safe working conditions.
2. What is laboratory?
the systematic study of the structure and behaviour of the physical and natural world through observation, experimentation, and the testing of theories against the evidence obtained.
the type of equipment found in a building or room equipped for conducting scientific research or for teaching practical science
Place where scientific research and development is conducted and analyses performed, in contrast with the field or factory.
the condition of being protected from or unlikely to cause danger, risk, or injury.
3. What is a Hazard?
items showing the risks associated with those items.
expected occurrence.
conditions that are likely to cause accidents.
unexpected occurrence .
4. What is an accident?
An unexpected occurrence
items showing the risks associated with those items.
conditions that are likely to cause accidents.
expected occurrence
5. Which one is not a hazard?
corrosive substances and sharp objects
flammable and toxic substance
cut and breathing problems
Slippery surfaces and Electricity
6. Which one is not a laboratory accidents?
electricity
slip and fall
breathing problems
irritation
7. Which one is an example of corrosive substance?
Spirit
Acid
Poisonous chemicals
wet floor
8. Which one is an example of flammable substance?
acid
poisonous chemicals
wet floor
spirit
9. Which one is an example of toxic substance?
poisonous fumes
spirit
acid
naked cables
10. Which one is an example of sharp objects?
razor blades
blunt nail
acids
naked cables
11. ------- used on containers whose contents can easily catch fire.
corrosive
carcinogenic
flammable
toxic
12. ------- used on containers whose contents can chemically destroy skin.
explosive
flammable
corrosive
toxic
13. ------- used on containers whose contents are life threatening if swallowed.
caution
environmental hazard
radioactive
toxic
14. ------- used to show substances that can cause long term health effect.
toxic
flammable
carcinogenic
caution
15. ------- used to show items that might explode if exposed to fire.
explode
caution
explosive
toxic
16. -------- used to show substances that can cause long lasting environmental effect.
radioactive
environmental accident
environmental hazard
toxic
17. --------------used to show substances that have less serious health effects.
caution
corrosive
toxic
explosive
18. common laboratory accidents include not............
scalds
cuts
burns
burns and irritation
19. There are three types of burns.Which one is not?
low
mild
moderate
severe
20. Which one is not a first aid measures for burns?
remove the cloth from the burned area.
bandage with a piece of cloth
cool the burned area using warm running water.
cool the burned area using cold running water.
21. ..........are caused by naked flames of concentrated acid or bases.
ingestion
scalds
cuts
burns
22. -------- is caused by hot water or steam.
scald
burn
cuts
ingestion
23. ----------caused by broken glass.
burn
cuts
scald
ingestion
24. ...........of harmful substances may result from swallowing poisonous chemicals.
ingestion
digestion
burn
scald
25. The following is not a proper dressing before going to the laboratory.
shirts and blouses must be untucked
long hair must be tied up
wear closed shoes
well buttoned and proper lab coat
26. The following is not a laboratory apparatus.
proper disposal off waste after experiment
repair a faulty apparatus
windows and doors should be open
do not splash water on electric sockets
27. If a fire erupts, immediately........
throw water on the fire.
open the windows.
run for the fire extinguisher.
notify the teacher.
28. Approved eye protection devices (such as goggles) are worn in the laboratory......
any time chemicals, heat, or glassware areused.
to avoid eye strain.
only if you do not have corrective glasses.
to improve your vision.
29. If you do not understand a direction or part of a laboratory procedure, you should........
try several methods until something works.
ask the teacher before proceeding.
skip it and go on to the next part.
figure it out as you do the lab.
30. After completing an experiment, all chemical wastes should be.........
taken home.
dumped in the sink.
left at your lab station for the next class.
disposed of according to your teacherβs directions.
31. You have been injured in the laboratory (cut,burned, etc.). First you should.........
see a doctor after school.
apply first aid yourself.
visit the school nurse after class.
tell the teacher at once.
32. Long hair in the laboratory must be......
cut short.
held away from the
experiment with one hand.
tied back or kept entirely out of the way with a hair band, etc.
always neatly groomed.
33. Which of the following should be worn during a laboratory activity?
dangling jewelry
loose clothing
sandals
googles
34. Horseplay, practical jokes, or pranks in the classroom are...........
always against the rules.
laboratory rules
okay if you are working alone.
not dangerous.
35. When handling animals, students should not......
open cages only with permission.
report bites or scratches to the teacher immediately.
not tease or handle animals roughly.
Scratch them
36. If a piece of equipment is not working properly, stop, turn it off, and tell...........
your lab partner.
the principal.
the teacher.
your best friend in the class.
37. When you finish working with chemicals,biological specimens, and other lab substances, always.....
treat your hands with skin lotion.
wipe your hands on your clothes.
wipe your hands on a towel.
wash your hands thoroughly with soap and water.
38. The following activity is not permitted in the laboratory Except........
drinking
Manipulation
chewing gum
eating
39. When using a razor blade or scalpel, always cut material....
toward you.
away from you.
perpendicular.
in your hand.
40. Before you leave the science room, you should not..........
leave your working area disorganized
return all equipment to the proper storage area.
wash your hands with soap and water.
clean your work area and equipment.
41. If you accidentally wear contact lenses in the lab, what should you do?
Not wear goggles
Not tell anyone
Borrow someone else's glasses
Tell the teacher
42. Which of the following is a proper attire for a science laboratory?
Open-toed shoes
A lab coat
Shorts
Jeans
Explanation:
A lab coat helps protect your clothes from spills and splashes of chemicals.
43. What should you do if you spill a chemical on your skin in the laboratory?
Let it dry
Rinse with water immediately
Cover it with a bandage
Continue working
Explanation:
Rinsing the chemical off your skin helps prevent skin irritation and burns.
44. Which of the following should not be done in a science laboratory?
Eating or drinking
Reading the lab instructions
Running experiments without supervision
Using your phone
Explanation:
Using your phone can distract you from following proper safety procedures and can be a source of contamination.
45. What should you do if you accidentally break glassware in the laboratory?
Inform your teacher and follow the proper cleanup procedure
Use your bare hands to pick up the pieces
Ignore it and continue working
Step on the broken glass to crush it further
Explanation:
Broken glass can cause cuts and injuries. It is important to inform your teacher so that the glass can be cleaned up safely.
46. Which of the following is a proper way to handle sharp objects in the laboratory?
Throw them in the trash bin without a cover
Hold them loosely
Point them towards others
Carry them with care and point downwards
Explanation:
Holding sharp objects carefully and pointing them downwards helps prevent injuries to yourself and others.
47. What should you do if you see a fire in the laboratory?
Use the fire extinguisher if trained to do so
Throw water on it
Try to put it out yourself
Run away and inform others
Explanation:
Using a fire extinguisher when trained can help control small fires and prevent them from spreading.
48. How should you dispose of chemicals in the laboratory?
Leave them on the lab bench
Throw them in the trash bin
Follow the instructions for proper disposal
Pour them down the sink
Explanation:
Improper disposal of chemicals can be harmful to the environment and can pose a safety risk. Always follow proper disposal instructions.
49. What should you do before conducting an experiment in the laboratory?
Ignore the safety precautions
Read and understand the lab instructions
Hurry to finish quickly
Skip wearing safety goggles
Explanation:
Reading and understanding the lab instructions helps you know the safety precautions and procedures to follow during the experiment.
50. Which of the following is a proper way to handle electrical equipment in the laboratory?
Keep cords away from water
Use them with wet hands
Plug in multiple devices in one outlet
Yank the cord to unplug
Explanation:
Water conducts electricity and can cause electric shocks. Keep electrical equipment away from water to prevent accidents.
51. What should you do if you are unsure about a safety procedure in the laboratory?
Guess and continue
Skip the procedure
Ask your classmates for advice
Consult your teacher for clarification
Explanation:
It is important to seek clarification from your teacher to ensure you understand and follow the correct safety procedures in the laboratory.