Title: Ch. 3.1.1 Safety Quiz
Course: Lab Safety > Section: Day 2

Adapted from Section 3.1.1 Rountes of Exposures to Hazards from Laboratory Safety for Chemistry Students by Hill and Finster

Q: What factor does NOT play a significant role in the extent of harm upon exposure to a chemical?
- Dose
- Length of exposure
- Physical state of the chemical (gas, liquid, solid)
- Path of exposure
A: Physical state of the chemical (gas, liquid, solid)

Q: What is the most effective method for avoiding exposure by ingestion?
- Taste only chemicals that your instructor give you permission to taste
- Taste only chemicals that you know are nontoxic
- Never eat or drink anything while in a chemistry lab
- Only eat food in a lab when you know that it cannot be contaminated with a toxic chemical
A: Never eat or drink anything while in a chemistry lab

Q: In order to avoid exposure to your eyes in a chemistry lab, you should wear eye protection
- only when working with corrosive chemicals
- only when your instructor requires it
- only when there are other students working nearby who might do something stupid
- all of the time
A: all of the time

Q: Volatile chemicals are substances that
- Are very reactive
- Have a vapor pressure of at least 100mmHg
- Are liquids that vaporize readily at normal pressure and temperature
- Are gases at normal pressure and temperature
A: Are liquids that vaporize readily at normal pressure and temperature

Q: The best way to avoid inhalation of volatile chemicals while working with them is to
- Work in a chemical fume hood when using them
- Avoid breathing the vapors by holding containers at arm's length
- Wear a common dust mask
- Always keep containers of the chemical capped or covered
A: Work in a chemical fume hood when using them

Q: Which definition is NOT correct?
- Mists are tiny droplets of liquid suspended in the air
- Fumes are small solid particles that are formed when a solid is vaporized
- Dusts are solid particles suspended in air
- A heterogeneous mixture in air is one where the contaminant is a colloid
A: A heterogeneous mixture in air is one where the contaminant is a colloid

Q: Smoke
- Is a mixture of aerosol particles resulting from the incomplete combustion of carbon-based materials
- Contains many toxic, small-molecule compounds
- Is a colloid
- All of the above
A: All of the above

Q: It is generally true that
- Almost all chemicals have an odor threshold below their toxic threshold
- Almost all chemicals have an odor threshold above their toxic threshold
- Whenever you can small a chemical you are being exposed to it
- None of the above
A: Whenever you can small a chemical you are being exposed to it

Q: Most adverse occupational exposures to chemicals are through
- Inhalation
- Dermal exposure
- Ingestion
- The eyes
A: Dermal exposure

Q: The best way to avoid chemical contact with the skin is to wear
- Clothes that protect most of your body
- A lab coat
- Shoes that cover your feet
- All of the above
A: All of the above

Q: Gloves worn in labs
- Are generally resistant to almost all chemicals
- Usually protect against only a limited range of chemicals
- Generally protect against most chemicals, but only for a short period of time
- Need to be selected carefully to protect against the particular chemicals you are using
A: Need to be selected carefully to protect against the particular chemicals you are using

Q: Having a chemical "injected" through your skin
- Is fairly unlikely in labs because chemists use needles and syringes only rarely
- Is possible if there is an expolsion that produces sharp glass that is contaminated
- Is not likely to produce a toxic dose
- All of the above
A: Is fairly unlikely in labs because chemists use needles and syringes only rarely