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Laboratory Management and Safety Final Questions and Answers
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Laboratory Management and Safety Final Questions and Answers TA grading Criteria 5 categories each experiment. Basis of discussion with mentor. Setup and cleanup Attendance and punctuality Preparedness: solutions prep., labeling, knowledge of experiment Effective communication: At least one ...

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  • December 29, 2024
  • 32
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • laboratory management and safety final questions a
  • what is the first concern for students as a ta ed
  • should you guess if you dont know the answer to a

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Laboratory Management and Safety
Final Questions and Answers
TA grading Criteria - answer 5 categories each experiment. Basis of discussion with
mentor.
Setup and cleanup
Attendance and punctuality
Preparedness: solutions prep., labeling, knowledge of experiment
Effective communication:
At least one pre-lab presentation during term

What is the first concern for students as a TA? - answer education and safety

Should you guess if you don't know the answer to a student's question? - answer No!
Seek input from the instructor

What are the key lab rules? - answer 1. Lab coats and safety googles
2. Gloves for hazardous materials (not outside)
3. Clothing and shoes (pants meet top of shoes; shoes completely cover foot and toes)
4. Labeling of waste
5. Cleanup after lab

Is it ok to keep materials on a cart if it is going to be used again later in the week? -
answer Yes

How should you respond to a student's question? - answer You should contribute
both to safety and making laboratory a valuable educational experience
- Answer to questions should balance educational value, safety, remaining time, existing
frustration level, importance, long term responsibility development
1. Direct answer
Easy (what students want!)
2. Indirect answer
Guide them in answering it themselves
3. No answer
Example: graded prelab questions

In sticky situations, who should be the bad guy? - answer The instructor

public safety number? - answer 706-729-2911

What is the "competent persons" definition? - answer OSHA 29 CFR 1926.32(f)
"A Competent Person means one who is capable of identifying existing and predictable
hazards in the surroundings, or working conditions which are unsanitary, hazardous, or

,dangerous to employees, and who has authorization to take prompt corrective
measures to eliminate them"

Right to know standard - answer 29 CFR 1910.1200

Solvent Safety Letter- Fire at UC Irvine 2001 example - answer Firefighters wouldn't
fight fire without MSDS which was only in the lab
Learned:
1. Prior relationship w fire department
2. Duplicate MSDS and invetory
3. Duplicate notebooks and research results

Different regulatory agentcies - answer -Consumer product safety commission
-DOT (Dept of Transportation)
-EPA (Environmental Protection Agency)
-OSHA

Types of labels - answer 1. industrial
2. Consumer
3. other (placards of trucks)

What should a label contain? - answer 1. Chemical name found on SDS
2. "owner"
3. Date
4. Desired-preparer and date

Can a batch of smaller bottles have one label? - answer yes, if they are placed
together on a shelf

Reccomended GHS label - answer 1. Name
2. Pictograms
3. Signal word (for most severe hazard- danger vs warning)
4. Hazard statements- see statements with pictograms
5. Optional supplemental info
6. Precautionary measures and pictograms
7. First aid statements
8. Company address and phone

See attached pictogram list - answer

NFPA diamond - answer Red=Flammability, Yellow=Reactivity, Blue=Health,
White=Special (OX-oxidizer, W with line through it-water reactive, ACID, COR-
corrosive, ALK-alkaline ) Precautions, 1 is lowest hazard, 4 is extremely hazardous

What is NFPA diamond intended for? - answer Basic info for firefighters/ short
exposure

,-acute
-emergency conditions

What are is the Hazardous Materials Identification System (HMIS) intended for? -
answer long term exposure (normal working conditions)
Chronic

Sections of HMIS? - answer Blue= health
Red= flammability
Yellow= reactivity
White= ppe

Community Right to Know Act - answer Gives people the right to obtain information
about hazardous chemicals being used in their communities
40 CFR

Difference between SDS and MSDS - answer MSDS Historical Purpose
- Information is intended primarily for emergency responders
- Assumption is that material is present in a large quantity

Global Harmonization SDS
- Intention is to provide relevant info to all users

Dr. Karen Wetterhahn example - answer - spilled 1-2 drops of dimethylmercury on
her latex gloves.
- symptoms worsened over several months and she dies 11 months after the accident

Napp Tech Disaster 1995 example - answer - explosion killed 5 workers
- Mix of aluminum powder, sodium hydrosulfite, potassium carbonate, and
benzaldehyde(4 tons total)
- Clogged nozzle was cleaned but introduced water and undesired reaction
- MSDS had contradictory info; more water was added in response, resulting gases
exploded

16 Sections of the SDS - answer 1. Identification of substance or mixture and
supplier
2. Hazards identification
3. Information on ingredients
4. First aid
5. Firefighting measures
6. Accidental release measures
7. Handling and storage
8. Exposure controls/personal protection
9. Physical and chemical properties
10. Stability and reactivity
11. Toxicology information

, 12. Ecological information
13. Disposal considerations
14. Transport information
15. Regulatory information
16. Other info including preparation and revision date of SDS

What is ppe? - answer Items worn by an individual to prevent injury to one or more
areas of the body

What are the tree main routes of chemical entry? - answer 1. ingestion
2. Inhalation
3. Dermal absorption

Where should ppe be stored? - answer in the area in which it will be used

How often should a chemical hygiene plan be done? - answer annually to inspect
protective equipment

Elizabeth Griffin example - answer Didn't wear safety glasses while moving monkey
cage and the animal flicked feces in her eye. She dies of herpes-B 8 weeks later

Typed of eye protection - answer 1.Non-ventilated googles=No holes
2. Direct ventilation= holes on sides
3. Indirect ventilation= little black vents
4. Safety glasses
5. Side shields on glasses
6. Face shield with glasses under

Are contact lenses dangerous? - answer After
careful study, CCS issued a statement in 1998 basically declaring that contact lenses
do not increase risks in
working with chemicals, but can actually minimize or prevent injury in many situations.

What does respirator protect from? - answer Solids
Liquids
Hazardous vapors
Harmful biologicals
Inadequate oxygen supply

4 major duties imposed by standard for respirators - answer 1.Use environmental
controls where feasible to control the hazard;
2.Provide an appropriate respirator
3.Ensure the use of an appropriate respirator, and
4.Institute a respiratory protection program

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