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