lab safety quiz

The campus masking policy states: (please select all answers that are correct)

-A face covering/face mask DOES NOT include a scarf, ski mask, balaclava, bandana, gaiter, turtleneck, collar, plastic face shield or single layer of fabric. -The campus masking policy states: (please select all answers that are correct) -Attendees at outdoor campus events must wear a face mask if required by the event organizer. -All students, faculty and staff are encouraged, but not required, to wear masks outdoors while on campus.

CHOOSE ALL THAT APPLY. Penalty for an incorrect guess is equal to the value of a correct answer. Laboratory incident reports help the faculty & staff track unexpected incidents in lab. Analyzing what happened and why it happened can help prevent future incidents and injuries. Which of the following situations need to be reported on a laboratory incident report?

-A student faints and falls to the floor but "wakes up" immediately and says they are fine. -A distracted student carries a volatile compound in an open container from the hood to his bench. Others object to the smell of the compound and complain. The TA sends the container back to the hood and on the emergency ventilation, turning all the hoods to full speed and pulling the maximum volume of air through the lab. TA asks everyone to wait in the hall for a few minutes. -A novice student who is washing glassware finds that clean glass is slippery and breaks a beaker in the sink. While cleaning the glass from the sink, a small shard cuts through her glove and pierces a finger. -A hurried lab student neglects to tighten a clamp and a flask falls to the bench, shattering and splashing the corrosive reaction mixture onto several lab notebooks. -A student slips on a drip of water on the lab floor and bangs her arm on a drawer handle, bruising the elbow. -After beginning class, the TA begins to feel unwell and sits down to rest. An observant student notices his condition and telephones the stockroom for assistance. A lab staff member and the instructor arrive and help the TA seek medical attention while the instructor continues the class. -A lab student uses tongs to move a hot dish, then leaves it to cool in an isolated area. Returning to store the dish, he picks it up and burns two fingers. -While adding chemical waste into a waste bottle with secondary containment, a small amount (<10 mL) of waste overflows the bottle but is caught by the secondary container. -A lab student finishes his work and removes his chemical splash goggles while walking toward the door to leave. Another student who is washing glassware breaks a beaker and splashes soapy water into the face of the first student.

Which of the following can reduce the risk of injury from a hazardous substance? (Choose all correct answers)

-Reducing the amount of hazardous material used in a procedure. -Replace a hazardous material with a less hazardous material. -Recognize that all chemicals have the potential to be hazardous. -Use available engineering controls to minimize exposures. -Use appropriate personal protective equipment.

Which statement is true about chemical asphyxiants?

A chemical asphyxiant interferes with the body's chemical processing of oxygen.

Hazardous waste bottles are placed in the laboratories and kept in secondary containers to capture any spills. Which of the following is true?

A laboratory student should reported to staff when the waste level approaches 90% of the bottle capacity.

Chemical hoods used in our laboratories protect workers using volatile hazardous materials. Which of the following statements is true?

A worker should feel a steady draft entering the face of the hood.

CHOOSE ALL THAT APPLY. Penalty for an incorrect guess is equal to credit for a correct response. A hazardous waste may be an excess of a starting material or an experimental product. What should a lab student do with a hazardous waste product?

Deposit an excess hazardous solid in the 'Excess Solids' waste jar. Never return an unused portion of a material to the stock bottle. Pour hazardous liquids into a liquid waste bottle provided.

A chemical splashed in the eye(s) should be flushed with running water. How long should the rinsing continue before stopping to further evaluate the situation?

Fifteen minutes

Which of these factors defines a "poison" (or "highly toxic material")?

LD50 < = 50 mg/kg

When directed to evacuate a lab in TATA HALL, where should students gather?

On Muir Field west of Tata Hall.

Many factors influence how much harm may be done upon exposure to a hazardous chemical. Which of these factors DOES NOT play a significant roll?

Physical state (gas, liquid, solid)

How should a laboratory student dispose of paper towels or sponges contaminated with hazardous chemical(s)?

Place in a blue "contaminated lab trash" bin lined with plastic bag.

The RAMP acronym used in our lab safety textbook reminds us of a system to follow for lab safety. What are the steps indicated by the letters R-A-M-P?

Recognize, Assess, Minimize, Prepare

What FIRST AID should immediately follow skin or eye exposure to a corrosive chemical (an acid or base, for example)?

Rinse with lots of running water.

A lab student notified the TA of a SMALL hazardous chemical spill. Under the TA's guidance, the student used the spill kit materials to clean it. Which of the following is NOT the student's responsibility?

Schedule a retraining session on materials handling with the safety coordinator.

A chemical compound may be identified in several ways. Which of the following identifiers is unique (does not apply to any other compound)?

The Chemical Abstract Service registry number (CAS number).

A chemical hood pulls room air in & through the enclosed work area. Where does the air go after that?

The air is exhausted directly to the atmosphere without treatment.

The air handling systems in chemical laboratories circulates air and balances the air pressure in various spaces. What difference should there be between the air pressure in a laboratory and the air pressure in an adjacent hallway?

The laboratory pressure should be less than that of the adjoining hallway ("negative pressure").

What is the reason for prohibiting ALL chewing gum, food, drink, and smoking materials in the chemistry labs?

The possibility of contamination and poisoning.

Why are solid closed shoes required, even on warm days?

To protect feet from both sharps and spills.

Which statement is true about volatile materials?

Volatile materials have high vapor pressures & low boiling points.

When should lab workers (including students) wear safety eye protection?

When anyone in the lab works with chemicals or glassware.

Which of the following conditions would preclude you from attending in-person chemistry lab for the day: (more than one answer may be correct)

You woke-up with a sore throat and cough. You have tested positive for Covid-19 in the past 5 days.

While massing a hazardous solid on the balance, a lab student finds he has taken more than needed. He removes a small portion from the weigh dish with a spatula. What is the recommended strategy for dealing with the excess material?

b & c -Offer it to another student to use, but never leave it unattended. -Deposit it in the 'Excess Solids' waste jar.

When chemicals are inhaled or ingested, they

may become either more toxic or less toxic molecules.