Title: Ch. 7.3.1
Course: Lab Safety > Section: Day 5

Adapted from Laboratory Safety by Hill and Finster, 2010 John Wiley and Sons

Q: What is an effective safety measure when running a rew reaction?
- Keep the temperature low
- Run the reaction on a small scale
- Run the reaction for just a short time
- Avoid using any catalysts
A: Run the reaction on a small scale

Q: When using the 'buddy system' to avoid working alone, you should
- Be in direct visual contact with each other, if possible
- Make sure that your buddy knows the hazards that are associated with the experiment you are performing
- Make periodic contact with your buddy if you are not in the same room
- All of the above
A: All of the above

Q: Under what circumstance can static charge cause difficulty in transferring a solid during weighing?
- High humidity
- A solid that easily sublimes
- Wearing nitrile gloves
- Working in a glove box
A: Working in a glove box

Q: Mercury spills
- Are not much of a concern since elemental mercury has such a low vapor pressure
- Are not much of a concern since mercury is primarily toxic by ingestion
- Must be cleaned up using special techniques
- Can effectively be swept up with a small broom and dustpan
A: Must be cleaned up using special techniques

Q: What is the main hazard when working with hot plates?
- Burns
- Electrical shorts
- Igniting flammable vapors
- Vaporizing ordinarily nonvolatile liquids
A: Igniting flammable vapors

Q: Domestic microwave ovens used for chemical reactions in laboratories
- Are nearly as safe as lab-grade ovens
- Can safely be used as long as the safety-interlock is over-ridden
- Should be wiped down inside before using them for heating food
- None of the above
A: None of the above

Q: Ultrasonic cleaners
- Work using frequencies well beyond what can be heard by humans
- Can also be used as a heat source for chemical reactions
- Use solutions into which you can place your fingers since the ultrasonic waves cause no tissue damage
- As sometimes acoustically insulated from the surroundings
A: As sometimes acoustically insulated from the surroundings

Q: It is safe to inhale powdered silica gel and powdered alumina used in chromatography since
- They have been treated to make them safe
- The particles are too small to cause respiratory irritation
- The particles are too large to cause respiratory irritation
- None of the above
A: None of the above

Q: What is a common problem in setting up distillation and reflux apparatuses?
- Failure to secure the cooling lines to the condenser
- Failure to secure the cooling line in the sink
- Running the cooling water at too high a pressure
- All of the above
A: All of the above

Q: What is a common hazard when using a separatory funnel?
- The release of aerosols when venting the funnel
- Heat buildup in the funnel
- Pressure buildup  in the funnel
- Both (a) and (c)
A: Both (a) and (c)

Q: The main hazard associated with using centrifuges is
- Broken tubes
- Aerosol formation from spinning the sample too rapidly
- Unbalanced samples leading to excessive vibration and rotor destruction
- Spilling samples since centrifuge tubes have round bottoms
A: Broken tubes

Q: A common hazard associated with vacuum pumps in the lab is
- Poor atmosphere quality due to the pump oil that escapes
- Exposed belts and moving parts
- Flammability from leaking pump oil
- None of the above
A: Exposed belts and moving parts

Q: Refrigerators using in laboratories
- Are designed the same as those used in domestic kitchens
- Can also store food and drinks as long as the laboratory chemicals are on a different shelf
- Have detectors indicating flammable vapor concentrations
- None of the above
A: None of the above