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