Lab Safety Signs and Instructions

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Questions and Answers

What is defined as a substance that causes an increase in the burning rate of a combustible material?

Toxic gas

Ultraviolet light

Radioactive material

Oxidizer (correct)

What type of gas is considered toxic with an inhalation LC50 between 200 and 2000 ppm?

Explosive gas

Toxic gas (correct)

Inert gas

Highly toxic gas

Which of the following is an example of a highly toxic gas?

Carbon dioxide

Bromine trifluoride

Fluorine (correct)

Nitric oxide

What amount of toxic materials triggers the need for special labeling in a room?

1 pound or more (B) Signup and view all the answers

Which symbol accompanies the recombinant DNA symbol in a lab?

Biohazard symbol (B) Signup and view all the answers

What type of radiation does a machine that produces X-Ray emit?

X-Ray radiation (B) Signup and view all the answers

What is the maximum wavelength range for ultraviolet light?

Between 300 nm and 400 nm (B) Signup and view all the answers

Which of the following is considered an oxidizing compressed gas?

Oxygen (A) Signup and view all the answers

What is the main purpose of the standardized lab caution sign at OSU?

To warn employees and visitors of hazardous areas. (B) Signup and view all the answers

In which area is a lab caution sign NOT required?

Offices. (C) Signup and view all the answers

Who is responsible for providing current information to generate the lab caution signs?

Personnel responsible for the hazardous area. (C) Signup and view all the answers

When is a restricted area icon required?

For labs with an active permit. (C) Signup and view all the answers

Which sign is required in laboratories with active permits?

Restricted Area Icon. (B) Signup and view all the answers

What does the No Food or Drink Icon signify?

Food and drink consumption is prohibited in labs with active permits. (A) Signup and view all the answers

What is the purpose of including emergency contact information in the lab?

To assist EH&S during emergencies. (A) Signup and view all the answers

What type of spaces does a notice sign indicate?

Spaces that are labs or shops without health hazards. (D) Signup and view all the answers

What is the primary purpose of goggles in a laboratory setting?

To protect against flying objects and corrosive materials (D) Signup and view all the answers

Which material is primarily used to make a spatula for transferring solid chemicals?

Porcelain or metal (A) Signup and view all the answers

What is the function of a stirring rod in a laboratory?

To stir solutions or aid in pouring (A) Signup and view all the answers

Which type of thermometer is commonly used for measuring temperature in a lab?

Alcohol-filled or mercury-filled glass thermometer (A) Signup and view all the answers

What is the main purpose of a burette in a laboratory setting?

To measure liquid volumes accurately (C) Signup and view all the answers

What is the purpose of a tripod in laboratory experiments?

To hold and support containers being heated (A) Signup and view all the answers

Which laboratory tool is used to cover a beaker or an evaporating dish?

Watch glass (A) Signup and view all the answers

Which type of burner is specifically made of an alloy of aluminum, iron or zinc?

Tirrill burner (B), Bunsen burner (D) Signup and view all the answers

What is the role of a vernier caliper in the laboratory?

It measures linear dimensions with precision (C) Signup and view all the answers

What distinguishes a base burette from an acid burette?

The type of stopcock used (D) Signup and view all the answers

What is the primary use of a test tube clamp?

To hold a test tube while heating or adding corrosives (C) Signup and view all the answers

What is the function of tongs in a laboratory setting?

To hold or handle hot laboratory apparatus (B) Signup and view all the answers

Which glassware is typically used to carry out chemical reactions on a larger scale?

Beaker (A) Signup and view all the answers

What type of brush is used specifically for cleaning test tubes in the laboratory?

Test tube brush (D) Signup and view all the answers

What is the purpose of a cork borer in a laboratory?

To punch holes in cork stoppers (B) Signup and view all the answers

What function does a balance serve in a laboratory?

To weigh samples accurately (C) Signup and view all the answers

What is the primary purpose of a volumetric flask?

To measure accurate volumes of liquids (A) Signup and view all the answers

What distinguishes a graduated pipette from a transfer pipette?

Graduated pipette has markings for measurements (C) Signup and view all the answers

Which equipment is used to quickly mix solids in solutions?

Rubber policeman (D) Signup and view all the answers

Which type of pipette is designed for transferring a precise volume indicated at an etched mark?

Volumetric pipette (A) Signup and view all the answers

What is a pycnometer primarily used for?

To measure specific gravity of liquids (C) Signup and view all the answers

Which equipment features a long graduated tube available in varying capacities from 0.2 to 50 mL?

Graduated pipette (D) Signup and view all the answers

What defines the structure of a reagent bottle?

It is fitted with a dust-proof stopper (B) Signup and view all the answers

What is the function of a pipette pump?

To fill pipettes with toxic liquids (C) Signup and view all the answers

What defines a corrosive material according to its pH level?

pH between 2 and 12 (A) Signup and view all the answers

Which of the following chemicals is an example of a flammable liquid?

1,3-Butadiene (A) Signup and view all the answers

What is the minimum volume of cryogenic liquids required for a room to be classified as containing cryogenics?

4 liters (D) Signup and view all the answers

Under what condition must a flammable cabinet be used for storing flammable liquids?

If the room contains 10 gallons or more of flammable liquids (D) Signup and view all the answers

What is the defining characteristic of a flammable gas?

Flash point below 100°F (B) Signup and view all the answers

Which of the following best describes the required amount of flammable gas for room classification?

100 cubic feet or more (D) Signup and view all the answers

Which of the following chemicals would not be classified as corrosive?

Liquid nitrogen (D) Signup and view all the answers

At what temperature do cryogenic materials remain in liquid form?

Below -238°F (C) Signup and view all the answers

Study Notes

Safety Instruction: Lab Caution Signs & Notice Signs

Standardized lab caution signs are used at OSU to warn those entering labs and hazardous areas.
Notice signs indicate that the area is a lab or shop but lacks typical lab safety hazards.
Signs are required at main entrances to labs, workshops, and similar areas, but not in offices, break rooms, or classrooms.
EH&S creates the signs, but lab/shop managers are responsible for providing accurate information.

Sign Components

Caution and Notice signs are examples.
Signs must include specific hazard warning icons.
Hazard Warning Icons—required for equipment/materials at specified amounts (see definitions below)
Restricted Area Icon—required for labs with active permits (e.g., laser, radiation, chemical, biosafety level 2, carcinogen).
No Food or Drink Icon—required for labs with active permits (same as restricted area).
Emergency Contact Information—lists names/contact information of individuals responsible for the space, for EH&S' use in emergencies.

Hazard Warning Icon Definitions

Biohazard: Biological agents capable of self-replication, posing a human health risk.
Plant Materials: Includes transgenic plant research (e.g., Arabidopsis, tobacco).
Carcinogen: Substances associated with cancer (e.g., arsenic, ethylene oxide).
Chemical Use/Chemical Storage: Chemicals are used/stored in the room. (Additional smaller hazard warning icons typically accompany this symbol).
Corrosive Materials: Corrosive materials (liquid pH < 2 or > 12).
Cryogenics: Liquefied gases at very low temperatures (e.g., liquid nitrogen).

Additional Hazard Warning Icon Definitions

Flammable Gas: 100+ cubic feet of flammable gas (STP). Flammable gas definition includes flash point, temperature, and container pressure.
Flammable Liquids: 1+ gallon of flammable liquids. Definition includes flash point.
Inert Gas: 100+ cubic feet of inert gases (STP). Inert gas is non-reactive.
Laser Lights: Class 3B or 4 lasers (ANSI Standard Z136.1), power exceeding 0.5W require a special sign from EH&S.
Magnetic Field: >0.5mT magnetic fields (static or time-varying).
Nanomaterials: Engineered nanomaterials that may pose risks via inhalation or skin contact (1-100nm in size).
Oxidizing Materials: 1+ pound of oxidizers (includes increasing rate of burning materials).
Radioactive Material: Any amount. Must adhere to radiation safety guidelines
X-Ray Equipment: Machines producing X-ray radiation. Must adhere to radiation safety guidelines.
Recombinant DNA: Work involving recombinant DNA requires a biohazard symbol in supplement.
Toxic Gas: Toxic gases (LC50 200-2000ppm) and highly toxic gases (LC50 < 200ppm).
Toxic Materials: 1+ pound of toxic chemicals; oral LD50 < 50 mg/kg or skin toxicity <200 mg/kg. Includes example chemicals.
Ultraviolet Light: UV light-emitting equipment. Wavelengths between visible light and x-rays.

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Description

This quiz covers the importance of lab caution and notice signs used at OSU for safety in hazardous areas. Learn about the different components of these signs, including hazard warning icons and required information for lab environments. Familiarize yourself with the essential safety protocols to ensure a secure laboratory experience.