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