Lab Exam - All Safety Quizzes

In case of a chemical splash to the eyes, how long should you rinse your eyes in an eyewash station?

15 minutes

When working in a lab it is important to orient yourself and identify locations of a fire blanket, fire extinguisher, the exits, eyewash stations, emergency showers, fire alarms, and waste containers. A) True B) False

A) True

Match each statement with either True or False. A) Hot glass looks the same as cold glass. B) All chemicals in the lab are to be considered dangerous. C) Work areas should be kept clean and tidy. D) Never remove chemicals or other equipment from the laboratory E) Chipped or cracked glassware is okay to use. F) Read all procedures thoroughly before entering the laboratory.

A) True B) True C) True D) True E) False F) True

Flame temperature can be adjusted by: (select all that apply) A) adjusting the gas flow by turning the handle on the natural gas valve B) adjusting the metal collar on the burner C) lighting the burner with a match

A) adjusting the gas flow by turning the handle on the natural gas valve B) adjusting the metal collar on the burner

In a laboratory, the following should not be worn A) all of the above B) leggings C) dangling jewelry D) sandals

A) all of the above

Which is the best definition of teratogen? A) can cause birth defects B) can cause cancer C) can cause ruptures in skin on exposure D) explosive

A) can cause birth defects

Which is the best definition of corrosive? A) can cause damage to living tissue B) can irritate eyes and cause tearing C) can cause birth defects D) can cause cancer

A) can cause damage to living tissue

What is the 'signal word' (if any) for silver nitrate? A) danger B) warning C) alert D) none

A) danger

After completing an experiment, all chemical wastes should be A) disposed of according to your TA's directions B) dumped in the sink C) taken home D) left at your lab station for the next class

A) disposed of according to your TA's directions

Personal eyeglasses provide as much protection as A) none of the above B) splashproof chemical goggles C) a face shield D) safety glasses

A) none of the above

Which of the following personal items are permitted to be at your workstation in the laboratory? Select all that apply. A) pen or pencil B) drinking water bottle C) lab manual (printout)

A) pen or pencil C) lab manual (printout)

What do the pictograms for 1-naphthol indicate? Select all that apply. A) skin corrosion/burns B) oxidizer C) irritant D) acute toxicity (fatal) E) flammable

A) skin corrosion/burns C) irritant

If you wear contact lenses in the school laboratory A) take them out before starting the lab and wear glasses under lab goggles B) keep the information to yourself C) you do not have to wear protective goggles D) advise your instructor that you wear contact lenses

A) take them out before starting the lab and wear glasses under lab goggles

When you finish working with chemicals, biological specimens, and other lab substances, always A) wash your hands thoroughly with soap and water B) treat your hands with skin lotion C) wipe your hands on a towel D) wipe your hands on your clothes

A) wash your hands thoroughly with soap and water

Is silver nitrate light sensitive? A) yes B) no C) unknown

A) yes

NFPA Diamond

Blue indicates the health hazard Red indicates flammability hazard Yellow indicates instability hazard White indicates special hazards

If I make a mistake in my lab notebook, I should... A) tear out the page and throw it away B) write the correct information on top of the mistake C) scribble out the mistake D) use white-out to cover up the mistake E) draw a single line through the mistake, then enter the correct information

E) draw a single line through the mistake, then enter the correct information

CAS Registry Number

Each substance has a unique numeric identifier designating only that substance, called the CAS Registry Number. The number can contain up to 10 digits, divided by hyphens, into three parts, much like a social security number.

What is the melting point of 1-naphthol, according to the SDS? A) 542 C B) 1.224 C C) 233 C D) 96 C E) 1870 C

D) 96 C

Horseplay or practical jokes in the laboratory are A) okay B) okay if you are working alone C) not dangerous D) always against the rules

D) always against the rules

Is 1-naphtol air and/or light sensitive? A) air sensitive only B) light sensitive only C) neither light nor air sensitive D) both air and light sensitive E) impossible to determine

D) both air and light sensitive

Which is the best definition of lachrymator? A) can result in skin rash B) irritates the lungs C) burns the skin D) can irritate eyes and cause tearing

D) can irritate eyes and cause tearing

Which is the best definition of asphyxiant? A) poisonous B) spontaneously catches on fire C) ignites in air D) can result in suffocation

D) can result in suffocation

The following footwear is best in the laboratory. A) crocs B) open-toed shoes C) sandals D) closed-toed shoes

D) closed-toed shoes

If a lab experiment is not completed, you should A) sneak into a different lab period to finish B) copy the results from another student in the lab C) make up results D) discuss the issue with your instructor/TA

D) discuss the issue with your instructor/TA

What does the exclamation mark represent when used as the pictogram on an SDS? A) carcinogen B) mutagen C) flammable D) irritant E) oxidizer

D) irritant

If a laboratory fire erupts, immediately A) run for the fire extinguisher B) open the windows C) throw water on the fire D) notify your instructor

D) notify your instructor

Long hair in the laboratory must be A) held away from the experiment with one hand B) always neatly groomed C) cut short D) tied back or kept securely out of the way with a hair band, hairpins, or other device

D) tied back or kept securely out of the way with a hair band, hairpins, or other device

If a piece of equipment is not working properly, stop, turn it off, and tell A) your lab partner B) the custodian C) your best friend in the class D) your TA/lab staff

D) your TA/lab staff

Chemical Splash Goggles

Tight fitting and cover the eye, eye sockets, and facial area around the eye completely. They provide protection from impact, dust and splashes.

Examples of combustible liquids

motor oil, kerosene, mineral oil, and diesel fuel

What is the CAS registery number for sodium hypochlorite?

7681-52-9

Dust Goggles

Also tight fitting, and resist the passage of large particles into the goggles.

When gathering glassware and equipment for an experiment, you should A) read all directions carefully to know what equipment is necessary B) all of the above C) examine all glassware for chips or cracks D) clean any glassware that appears dirty

B) all of the above

Flammable materials, like alcohol, should never be dispensed or used near A) another student B) an open flame C) a sink D) an open door

B) an open flame

If you do not understand a direction or part of a lab procedure, you should A) figure it out as you do the lab B) ask the TA before proceeding C) skip it and move on to the next part D) try several methods until something seems to work

B) ask the TA before proceeding

Approved eye protection devices (such as goggles) are worn in the laboratory A) only if you don't have corrective glasses B) at all times C) to avoid eye strain D) to improve your vision

B) at all times

You are heating a substance in a test tube. Always point the open end of the tube A) toward another classmate B) away from all people C) toward yourself D) toward your lab partner

B) away from all people

Which is the best definition of mutagen? A) can cause radiation B) can cause genetic mutation C) can cause birth defects D) can cause cancer

B) can cause genetic mutation

What happens when silver nitrate is heated to composition? A) nothing B) may emit toxic fumes C) releases water D) forms carbon dioxide

B) may emit toxic fumes

You have been injured in the laboratory (cut, burn,etc.). First you should A) apply first aid on your own B) notify your TA/instructor immediately C) call your doctor after class D) visit the infirmary after class

B) notify your TA/instructor immediately

What effect (if any) does silver nitrate have on aquatic species? A) none B) toxic C) unknown D) is beneficial

B) toxic

What does the skull and crossbones represent when used as the pictogram on an SDS? A) carcinogen B) flammable C) acute toxicity D) corrosive E) explosive

C) acute toxicity

Which is the best definition of the term 'cryogenic'? A) may cause cancer B) poses a threat to the health of living organisms C) being or related to very low temperature D) being or related to very high temperature E) none of these

C) being or related to very low temperature

What color is silver nitrate? A) white B) yellow C) colorless D) silver E) orange

C) colorless

Which pictogram(s) appear on the SDS for silver nitrate? Select all that apply. A) carcinogen B) flammable C) irritant D) skin corrosion/burns E) explosive F) oxidizer

C) irritant D) skin corrosion/burns F) oxidizer

If an acid is splashed on your skin, wash at once with A) weak base B) oil C) plenty of water D) soap

C) plenty of water

You are heating a piece of glass and now want to pick it up. You should A) pour cold water on it B) pick up the end that looks cooler C) use tongs D) use a rag or paper towels

C) use tongs

What should be used to extinguish a fire containing silver nitrate? A) carbon dioxide B) halons C) water D) tri-class dry chemical

C) water

Face Shield

Extend from above the eye to below the chin across the width of the head. Provide protection against splashes or sprays. Can also be used for UV protection if designed to do so.

Laser Eyewear

Eye protection is required for particular classes of laser where eye irradiation is possible. Must be used only at the wavelength and energy/power for which intended.

Although eating and drinking are not permitted in the laboratory, chewing gum and candy are allowed. True or False

False

Cryogenics are stored at high temperatures. True or False

False

Halogens are unreactive. True or False

False

Hot objects can be placed directly on the lab benchtop to cool. True or False

False

Hydrogen gas is considered a carcinogen. True or False

False

Magnesium chloride solution is considered flammable. True or False

False

Mercury is readily absorbed through the skin. True or False

False

Oxidizing agents and reducing agents should be stored close to one another for safety. True or False

False

Peroxides can be stored indefinitely. True or False

False

This concentration of HCl solution is considered flammable. True or False

False

This concentration of aqueous HCl is light blue in color. True or False

False

You can always tell if an object is hot by looking at it. True or False

False

Flammability

Flammable and combustible liquids are liquids that can burn. The main difference between the two is that flammable liquids can catch fire and burn easily at ambient temperatures, whereas combustible liquids require higher than normal temperatures to ignite.

Is 1-octanol a flammable liquid according to NFPA?

Flash point of 81C<100C, so 1-octanol is flammable

Safety Glasses

Have metal or plastic safety frames and impact-resistant lenses. Side protection is also required.

Welding Shield

Protect eyes from burns caused by intense light. Protect eyes/face from flying sparks and metal spatter.

Fluid Resistant Shield

Provide splash protection from biological materials, and do not provide protection against chemicals or impact hazards. They are not compliant with Z87.1. (ex. Dr. Pimple Popper often wears a fluid resistant shield during surgery)

Which form of eye protection is most appropriate for use in the general chemistry lab?

Safety glasses or goggles

Shown is the NFPA diamond for sodium (Na). What is the health hazard of Na? Blue - 3 Red - 3 Yellow - 2 White - W

Serious or permanent injury

Flash Point

The flash point is the minimum temperature at which a liquid forms a vapor above its surface in sufficient concentration that it can be ignited. Liquids with lower flash points ignite more easily. Flammable liquids have a flash point of <100°F. Combustible liquids have a flash point of >100°F.

Fire Point

The lowest temperature at which the vapors keep burning after the ignition source is removed. The fire point is higher than the flash point for a substance.

Both acids and bases can be corrosive. True or False

True

Electricity can be hazardous. True or False

True

Flammable liquids should be used with care near sources of ignition. True or False

True

Hydrogen gas is considered an asphyxiant. True or False

True

Hydrogen gas is considered flammable. True or False

True

It is important to check glassware for scratches, nicks and cracks before heating. True or False

True

It is safe to wash with water if one's skin is exposed to magnesium chloride solution. True or False

True

Long hair should be tied back when using a Bunsen burner. True or False

True

Magnesium is considered flammable. True or False

True

Magnesium reacts with water and acid solutions. True or False

True

Pyrophoric substances can burn spontaneously in air. True or False

True

Water can be safety added to this concentration of aqueous HCl solution. True or False

True

Examples of flammable liquids

diethyl ether, pentane, acetone, ethanol and benzene

An acetone wash bottle is shown below. What is the stability of acetone? Blue - 1 Red - 3 Yellow - 0

stable